ML-2570/FEV Basic Model : ML-2571NSERVICE LASER PRINTER Manual The keynote of Product - Speed : 25ppm (Ltr) / 24ppm(A4), 600dpi - Paper Path : MPF Type Cassette - Emulation : SPL (ML-2510) PCL (ML-2570/ML-2571N) - Processor : 150MHz Jupiter4e CPU 400MHz SPGP V3 CPU - Memory : ML-2510(SDRAM, 8MB), ML-2570/2571N(SDRAM, 32MB) - MP Cassette : 250 pages / Face Down (100 pages) - Fuser Design : Lamp Type - I/O : ML-2510(USB1.1+IEEE 1284), ML-2570/2571N(USB2.0+IEEE 1284) ML-2571N - Machine Life : 50K(pages) ELECTRONICS GSPN (Global Service Partner Network) North America : service.samsungportal.com Latin America : latin.samsungportal.com CIS : cis.samsungportal.com Europe : europe.samsungportal.com China : china.samsungportal.com Asia : asia.samsungportal.com Mideast & Africa : mea.samsungportal.com Samsung Electronics Co.,Ltd. February. 2006 Printed in Korea. VERSION NO. : 1.00 CODE : JC-0173K Contents 1. Precautions 1.1 Safety Warning 1.2 Safety Caution 1.3 ESD Precautions 1-1 1-2 1-4 2. Product spec and feature 2.1 Product Specifications 2.1.1 Product Overview 2.1.2 Specifications 2.1.3 Model Comparison Table 2.1.4 ACCESSORY 2.2. System Overview 2.2.1 System Outline 2.2.2 H/W Structure and Descriptions 2.2.3 S/W Structure and Descriptions 2.2.4 Initial Product Installation 2-1 2-1 2-1 2-5 2-6 2-7 2-7 2-13 2-29 2-33 3. Disassembly and Reassembly 3.1 General Precautions on Disassembly 3.2 Disassembly and Reassembly 3.2.1 Front Cover 3.2.2 Cassette Tray 3.2.3 SMPS Cover (Rear Cover) 3.2.4 Main Cover (Top Cover & Side Cover L,R) 3.2.5 Cap-SMPS 3.2.6 HVPS 3.2.7 RX Drive 3.2.8 Fuser 3-1 3-2 3-2 3-2 3-3 3-4 3-5 3-6 3-7 3-8 5 Main Assembly Frame Assembly Fuser Unit Paper Path Assembly RX_Drive 5-2 5-4 5-6 5-8 5-10 .2 Control Panel 4.10 LSU 3.Continued 3.12 Pick_Up Roller 3-11 3-13 3-13 3-14 4.2.1. Exploded Views & Parts List 5.1 5.2.1.2.2.1 Sample Pattern 4.1 Checking Symptoms 4.2.2 Troubleshooting 4.5 How to use DCU 4.6 Paper Path 4.1 Alignment and Adjustments 4.4 Periodic Defective Image 4.2 5.2 Bad discharge 4.9 Engine Shield (Including Main PBA and SMPS) 3.5 Bad image 4-1 4-1 4-3 4-4 4-5 4-6 4-11 4-17 4-17 4-20 4-27 4-36 4-40 5.1.2.2.3 Malfunction 4.11 Paper Path Frame 3.3 5.4 Bad Software Environment 4. Alignment & Troubleshooting 4.1.1.2.1.4 5.2.3 Consumables and Replacement Parts 4. System Diagram 6.3 7.2 ML-2570/2571N H/W Block Diagram 6.2 7.1 Block Diagram 6.1.1.2.2.1 ML-2510 Connection Diagram 6.2 Connection Diagram 6. Reference Information 7.2 ML-2570/2571N Connection Diagram 6-1 6-1 6-2 6-3 6-3 6-4 7.Continued 6.4 Troubleshooting Tools Acronyms and Abbreviations Selecting printer locations Sample Tests Patterns 7-1 7-2 7-4 7-5 .1 ML-2510 H/W Block Diagram 6.1 7. (2) Do not rebuild. printer will abnormally work and electric shock or fire may occur.1 Safety Warning (1) Request service by qualified service person. If so. these basic safety precautions should always be followed to reduce risk of fire. It is dangerous if unqualified service personnel or users try to fix the machine. Service for this machine must be performed by a Qualified service person. and injury to persons. When using this product. although invisible. chapter 1 Subchapter J for Class 1(1) laser products. The reflected beam. is certified as a Class I laser product conforming to the requirements of IEC 825. The laser system and printer are designed so there is never any human access to laser radiation above a Class I level during normal operation. 1. electric shock. Service Manual Samsung Electronics 1-1 . or prescribed service condition. Do not attach or change parts discretionary. and elsewhere. Warning >> Never operate or service the printer with the protective cover removed from Laser/Scanner assembly. fix of rebuilt it.1 Precautions 1. (3) Laser Safety Statement The Printer is certified in the U. Class I laser products are not considered to be hazardous. can damage your eyes. Do not dissemble. Please read carefully and keep the contents in mind to prevent accidents while servicing and to prevent the machine from getting damaged. user maintenance. to conform to the requirements of DHHS 21 CFR.S. Precautions The cautions below are items needed to keep in mind when maintaining and servicing. A damaged power cord must be replaced immediately.2 Safety Caution 1. Do not spread insecticide on the power cord. An electric shock could happened. chopped. a fire can be occurred. When servicing. 1-2 Service Manual Samsung Electronics . (4) Do not put water or extraneous matter in the PRINTER. a fire or electric shock can happen. or sound from the machine. A fire or electric shock could happen. (11) Avoid direct sunlight. repair it immediately. strange smell. A plug part need to clean well with dried fabric to remove dust. grip the plug and take it off. or bind it and place other materials on it. A fire or electric shock can be happen due to thinner(weak) cover of the power cord.2 Electric Shock or fire Precaution It is possible to get electric shock or burn by fire if you don't fallow the instructions of the manual. (7) Management of power cord. Take the power plug off there is thunder. a fire can be caused due to poor contact. If not. The power plug has to be inserted completely. Do not put steel or metal piece into a ventilator. remove the power plug from outlet. Do use the power cord supplied with PRINTER. If water drops are dripped on the place covered with dust. If grip the line and pull over. When such inferiorities are found. Do not install the printer where lots of dust or around humidifier. other liquid. turn off the power and remove the power plug from outlet immediately. (1) Use exact voltage. A fire can be occurred due to flow over current in an outlet. Please use an exact voltage and wall socket. Do not bend. (5) Do not touch the power plug with wet hand. If not. If you keep using it. A fire can happen when over current flows in the power cord. (12) Turn off the power and take off the plug when smoke. Please do not put water. and being flash of lightening. Do not make it pressed or chopped when moving the machine.2. pin. Do not touch cable and device when thundering and flash of lightening. a fire or an electric leakage can be caused. It causes a fire or electric shock. (2) Use authorized power cord. (3) Do not insert many cords in an outlet. or blazing fire or not. a fire can occurred. A repaired part with plastic tape can be cause a fire or electric shock. If the machine contacts sunlight long time. A fire can occur. clip. A fire can occurred. twist. the machine cannot work properly because inner temperature of the machine is getting hotter. (9) Caution when there is thundering or lightning. which may harm human body if it is swallowed. Do not spread chemicals on the power cord. or malfunction. (13) Do not insert steel or metal piece inside/outside of the machine. 1. (6) Caution when inserting or taking off the power plug. electric shock. Please keep children out of reach of the toner cartridge. If this occurs.2.1 Noxious Material Precaution The toner in a printer cartridge contains a chemical material. Do not install the printer near window where direct contacts to the sunlight. When taking off the power plug. If the power cord gets damaged. Do not insert or take off it with wet hand. etc. Electric shock can be occurr. (8) Check whether the power outlet and the power plug are damaged. It can cause a fire. it could be damaged. Do not fix with staples. Do not repair the damaged part and reuse it.Precautions 1. (10) Avoid the place where is moisture or has dust. pressed. (5) Do not over-force when release or tighten up the plastic parts. check the assembling state whether it is same as before the repair or not.2. Please confirm whether it is balanced or not after installation. Once it happens. (2) Be careful not to insert a finger or hair in the rotating unit. (2) Before servicing or replacing electric parts. (5) Do not place a candlelight. rated voltage. (4) Use formal parts and same standardized goods when replacing parts. A fire or electric shock can be caused. an accident can be happened due to the machine falling over. or etc. paper feeding part. (4) Do not install it where lots of moisture or dust exists or where raindrop reaches. rated current. on the machine. you could be harmed. etc) while the machine is operating. fan. A fire can be occurred.3 Handling Precautions If you ignore this information. or slanted floor. (8) Remove dust or foreign matters completely to prevent fire of tracking. take off plug. (3) Take off printer cables and power cord connected to printer. Be careful not to insert a finger of hair in the rotating unit (motor. part cord. operating temperature.4 Assembly/Disassembly precaution When replacing parts. and etc. (6) Be careful not to drop small parts such as screws in the printer. Do not install it near to heater. short. (1) Check the contents stored in the memory. Memorize the location of each cable before replace parts for reconnecting it afterwards. etc. (7) Be careful not to change the location of small parts such as screws when assembling and disassembling. you could harm machine and could be damaged. a fire or electric shock can be occurred. Please perform the steps below before replace or disassembly the parts. Memorize.2. (3) Do not place a pot containing water/chemical or small metals. 1.Precautions 1. burning cigarette. Service Manual Samsung Electronics 1-3 . (1) Do not install it on different levels.Must check the product name. If it is unbalanced. If they got caught into the inner side of machine. do it very carefully. The information needed to keep has to be written down. (9) After finished repair. All the information will be erased after replacing main board. Normal motions. can generate static electricity sufficient to damage an ESD. such as aluminum or copper foil. 8. Maintain continuous electrical contact between the ESD and the assembly into which it will be installed.Precautions 1. Most replacement ESDs are packaged with all leads shorted together by conductive foam. 6. these can generate electrical charges sufficient to damage ESDs. Alternatively. Immediately before removing the protective shorting material from the leads of a replacement ESD. Do not remove a replacement ESD from its protective packaging until immediately before installing it. Minimize bodily motions when handling unpackaged replacement ESDs. such as the brushing together of clothing fabric and lifting one’s foot from a carpeted floor. some field effect transistors. When sprayed. Examples of typical ESDs are: integrated circuits. 2. and observe all other safety precautions. Immediately before handling a semiconductor component or semiconductor-equipped assembly. Do not use Freon-propelled chemicals. Some solder removal devices not classified as “anti-static” can generate electrical charges sufficient to damage ESDs. 7.3 ESD Precautions Certain semiconductor devices can be easily damaged by static electricity. 1. Use only a grounded tip soldering iron to solder or desolder ESDs. Such components are commonly called “Electrostatically Sensitive (ES) Devices”. After removing an electrical assembly equipped with ESDs. or a comparable conductive material. to prevent electrostatic charge buildup in the vicinity of the assembly. or conductive foam. 4. 5. Use only an “anti-static” solder removal device. until completely plugged or soldered into the circuit. 1-4 Service Manual Samsung Electronics . place the assembly on a conductive surface. and semiconductor “chip” components. aluminum foil. The techniques outlined below should be followed to help reduce the incidence of component damage caused by static electricity. employ a commercially available wrist strap device. drain off any electrostatic charge on your body by touching a known earth ground. touch the protective material to the chassis or circuit assembly into which the device will be installed. or ESDs. 9. Caution >>Be sure no power is applied to the chassis or circuit. 3. which should be removed for your personal safety reasons prior to applying power to the unit under test. Manual Feeder : 16 ~ 43 lb 352 X 298 X 243 mm Net : 5.1.2.1 Product Overview Item ML-2571N ML-2510.) 24ppm(Ltr.1. 3K(sailes) USB 1. Jupiter 4e 150MHz.2 Specifications Product Specifications are subject to change without notice. 1200 X 1200(ML-2570/2571N) Laser diode (LSU : Laser Scanning Unit) Cold Warm-up : 15sec.6Kg with out toner cartridge(W/O) Gross : 8. Product specification and feature 2.7Kg(41Ib) Acoustic Noise Power save mode Toner save mode Machine Life Stand by : Less than 35 dB Printing : Less than 53 dB Yes Yes 50.0) + IEEE 1284 Parallel : ML-2510 USB 2. 32Mbytes SDRAM 1K(initial).5 X 14”) Cassette : 16 ~28 lb .1 (Compatible with USB 2. 8Mbytes SDRAM. 2.1 General Specifications Item Print Method Developing system Descriptions Electro-photographic Printing Non-Magnetic. 100pages Face Down Series Model Market of Sailes Specification Descriptions Remark 2. ML-2570 Persnal user Laser printer.000pages Source of Light Warm-Up Time First Print Time Feed Method Media Size Paper thickness Size(W X D X H) Weight Service Manual Samsung Electronics 2-1 . ML-2571N 250pages feeding. Sleep mode : 15sec Less than 9 seconds (Ready to 1st page out) Cassette & Manual 76 X 128mm (3 x 5”) to 216 X 356mm (8.(Low Price for small work Group. Mono-Component Developing System 24 PPM : A4 size 25 PPM (Letter size) True 1200 X 600 DPI.1.0 + IEEE 1284 Parallel : ML-2570. 25ppm). SPGP V3 400MHz. See below for product specifications.Product spec and feature 2 Basic Model Print Speed Resolution 2.1 Product Specifications 2. 0 + IEEE 1284 Parallel port) 2-2 Service Manual Samsung Electronics .ML-2510/32MB(Max.000 Pages Fuser Assembly : 50.0)+IEEE 1284 for ML-2510.1 (Compatible with USB 2.Paper capacity : 250sheets .2 Controller Item Processor(CPU) Memory Descriptions Jupiter 4e 150MHz/SPGP V3 400MHz Standard/Max.Product spec and feature Item Periodic Replacing Parts Same with Machine Life Descriptions Pick Up Roller : 50.000 Pages Toner Sensor Toner Type Toner Initial Toner sale No Non-Magnetic Contact System 1.000 Pages Transfer Roller : 50.1. 8MB) . Type : NO Compression Technology : MET(Memory Enhancement Technology) (Emulation) (Interface) Standard : SPL/PCL Auto Emulation Sensing : YES USB 1.000 sheets@ISO 5% coverage 3. 32MB) .Paper weight : 60 ~ 163 g/ 2. : 8MB(Max.2.000 sheets@ISO 5% coverage / 16 ~ 43 lbs Cassette .0+IEEE 1284 for ML-2570/2571N Option : NO Auto Interface Sensing : YES Font Test Print Type : Windows Fonts Number : NO Demo Mode : Press the Demo Key for 2 Seconds Configration Mode : Press the Demo Key for 4 Seconds Cleaning Mode : Not Support Service Mode : Press the Demo Key when Power on(F/W Download) ML-2510 model : I/O Support(USB 1. USB 2.1 + IEEE 1284 Parallel port) ML-2570/2571N model : I/O Support(USB 2.ML-2570/2571N Type : SDRAM Expand Memory Slot. 5W Ave or less-ML-2570/2571N Model 2.2.000 Pages(sailes) Developing Method Charging Method Toner Empty sensor Ozone Cartridge Style Non-magnetic Contact Developing Conductive Roller Charging No 0.5 Toner Cartridge Item Life span Descriptions Starter: 1.2. ISO 19752 Pattern 5% Coverage SIMPLEX Service Manual Samsung Electronics 2-3 .000 Pages(initial) Running : 3. 420W) .Product spec and feature 2.1.1.5W Ave or less-ML-2510 Model 8.1.3 Electrical Specification Item Input Voltage Nominal input voltage Input voltage range Nominal frequency Frequency tolerance Power Consumption Descriptions 220~240 VAC 198~255 VAC 50/60 MHz +3Hz Remark Printing : 390W Ave(Max.1PPM or less Single cartridge Remark A4 Size.4 Environmental Range Item Temperature Humidity 20~80%RH Operating 10~30 oC(50-90 oF) Storage -20~40 oC (-4~104 oF) 10~80%RH 2.2570/2571N Model Idling : 65W Ave or less-ML-2510 Model 70W Ave or less-ML-2570/2571N Model Power Save : 6.2. 400W) .2510 Model 400W Ave(Max. 1.2.25 X10.6(a) Input Paper Size Paper A4 Letter US Folio(Legal13") Legal(Legal14") Executive Statement ISO B5 JIS B5 A5 A6 No.5 X 11") 216 X 330(8.5") 98 X191(3.5 x8.01") 114 X 162(4.6 Paper Handling Specifications Please refer to Paper Secifications on user Guide.5") 176 X 250 182 X257 148 X 210 105 X148 105 X 241(4.6(b) Input capacity Item Cassette 250 sheets Descriptions 2.66") 162 X 229(6. 2.38") A4 or Letter A4 or Letter O( O( O( O( O( O( O( O( paper size Cassette O O O O O O O O O ) ) ) ) ) ) ) ) 2.10 Env.38 X 9.5") 140 X 216(5.6(c) Output capacity 2-4 Service Manual Samsung Electronics .49 X 6. C6 Env.2.5 X 13") 216 X 356(8.5") 110 X 220(4.2.15 X 9.5 X14") 184 X 267((7. C5 Env.1.33 X 8.2. DL Env.1.Product spec and feature 2. Monarch Env.1.87 X 7. Transparency(OHP) Label paper 210 X 297 mm 216 X 279(8. Thick stock Physical Type Dimensions w/output tray extended(WxDxH) Weight(without cartridge) Carton Dimensions (WxDxH) Weight(as shipped) Electical Power Requirements Power Consumption Energy Star* Compliant Environmental Temprature : .6kg 455mm x 415mm x 325mm 8. Index(163g/m2) Laser Printer with Internal Controller 352mm x 298mm x 243mm 5. Bond(60 to 90g/m2) 24 .0)+ IEEE 1284 Parallel Cable Not Supply(KOR. Standby : <35dB(A) Consumables Starter up to 1.000 prints per month Samsung SPGP V3 400MHz 32MB SDRAM(32MB) Win9X/ME/2000/XP/Linux7/NT4. Up to 25ppm in letter 9sec 1200x1200 up to 5000 prints per month Samsung SPGP V3 400MHz 32MB SDRAM(32MB) Win9X/ME/2000/XP/Linux7/NT4.6 PCL USB 2.Product spec and feature 2.5W Down Sleep Mode Yes Power Consumption 400W printing.000 pages(A4/Letter) at ISO 5% coverage continuous printing. Index(163g/m2) Laser Printer with Internal Controller 352mm x 298mm x 243mm 5.0/Mac OS8.000 pages(A4/Letter) at ISO 5% coverage Service Manual Samsung Electronics 2-5 .Operating 10 to 32 .Plain paper .0 IEEE 1284 Parallel N/A 250 Sheets Multi-purpose Tray 100 Sheet Face Down Tray Manual 16 to 24 lb.6 PCL USB 2. Bond(60 to 90g/m2) 24 .3 Model Comparison Table Model Name Company Printing Process Print Method: Print Speed FPOT Resolusion Duty Cycle.000 pages(A4/Letter) at ISO 5% coverage continuous printing.5W Down Sleep Mode Yes 10 to 32 0 to 40 : 20% to 80% RH : 20% to 80% RH Operating : <53dB(A). Monthly Hardware Software Processor Type Memory OS Standard Emulations Interface Support Standard Interfaces ML-2510 Samsung Electrophotographic Laser Up to 24ppm in A4.Operating : 20% to 80% RH .Non-Operating : 20% to 80% RH Noise Level : Operating Operating : <53dB(A). Up to 25ppm in letter 9sec 1200x600 up to 5000 prints per month Samsung Jupiter 4e 150MHz 8MB(8MB) Win9X/ME/2000/XP/Linux7/NT4. up to 3.000 pages(A4/Letter) at ISO 5% coverage Power Consumption 390W printing.0/Mac OS8.1(Compatible with USB 2. Bond(60 to 90g/m2) 24 .7kg Optional Interfaces Paper Handling Standard Paper Input Paper Output Duplexing Paper Weight : .6 SPL USB 1.90 lb.000 pages(A4/Letter) at ISO 5% coverage up to 1.6kg 455mm x 415mm x 325mm 8. Replacement up to 3. Standby : <35dB(A) up to 1. continuous printing.Non-Operating 0 to 40 Humidity : . 8.6kg 508mm x 425mm x 265mm 8.5W Down Sleep Mode Yes Power Consumption 400W printing.000 pages(A4/Letter) at ISO 5% coverage up to 3. 8.CHINA is Supply) N/A 250 Sheets Multi-purpose Tray Face down : 100 Sheet(TBD) Manual 16 to 24 lb.7kg ML-2571N Samsung Electrophotographic laser Up to 24ppm(A4) 9sec 1200x1200 up to 15. Index(163g/m2) Laser Printer with Internal Controller 352mm x 298mm x 243mm 5.90 lb.0 IEEE 1284 Parallel N/A 250 Sheets Multi-purpose Tray Face down : 100 Sheet(TBD) Manual 16 to 24 lb.90 lb.7kg ML-2570 Samsung Electrophotographic Laser Up to 24ppm in A4. Standby : <35dB(A) 10 to 32 0 to 40 : 20% to 80% RH : 20% to 80% RH Operating : <53dB(A).0/Mac OS8.1. 6. Acessory INA-ACCESSORY S/W APPLICATION-CD COVER-M_PAPER (PAPER COVER) MANUAL-(CARD)WARRANTY CARD Code JC99-01993J JC46-00287A JC63-01119A JC68-00690A Quantity 1 1 1 Acessory INA-ACCESSORY S/W APPLICATION-CD COVER-M_PAPER (PAPER COVER) MANUAL-(CARD)WARRANTY CARD Code JC99-01986C JC46-00291A JC63-01119A JC68-00690A Quantity 1 1 1 2-6 Service Manual Samsung Electronics . These model are as yet undeveloped.Product spec and feature *. 2. System Overview 2.1 System Outline Paper Path Layout 14 12 13 BIN PATH 12 13 MAIN PBA HVPS SMPS 14 Service Manual Samsung Electronics 2-7 .2.Product spec and feature 2. Product spec and feature Unit Layout Panel HVPS LSU Motor SMPS Main PBA 2-8 Service Manual Samsung Electronics . 1. and it has the sensor function to check the existence of the loading paper. it supplies the power to the feeding unit. It adheres the toner on the paper with pressure and heat to complete the printing job. Envelope etc. the fusing unit.(Motor drive IC : A3977) .2. 1) Feeding Type : MPF Type 2) Feeding Standard : Center Loading 3) Feeding Qty : Cassette 250 sheets (75g/ .4 FUSER The fuser is consisted of the Heat Lamp.1.2 Transfer Ass’y The transfer roller delivers the toner of the OPC drum to the paper.) 5) Separating Type : Cassette .1 Feeding There are the C-path type.1. OHP.2.2.3 Driver Ass’y It is a power delivery unit by gearing. 20lb paper standard) 4) Manual 1 sheet (Paper.Heat Roller.Life Cycle : 50K(pages) Service Manual Samsung Electronics 2-9 .2.It is a power delivery unit by gearing : Feeder/Developer Motor Fuser/Exit 2. and the distributing unit.Friction Pad Type 6) Manual : None 7) Driver Type : Driving by Gearing from Main Motor 8) Pick_up Roller Driver : Solenoid 9) Paper detecting Sensor : Photo Sensor 10) Paper Size Sensor : None 11) Paper Exit Type : Face Down 2. and the manual feeder. which loads papers.1.000 sheets (in 16 ~30 ) 2.The life span : Print over 50.Thermister and Thermostat.Pressure Roller. . By driving the motor.Product spec and feature 2. .The cassette has the function pad which separates paper one by one. which supplies paper one by one. .Length : 222 mm 6) Paper separation method Teflon Coating with mold Claw System 7) Safety Relevant Facts . Life : 3000 Hr 2) Thermostat . SYSTEM Temperature SETTING .5 (before 30pages) 75 + /. Shaft .5 . Rubber .1st protecting device : H/W cuts off when detecting an overheating .5 mm . Protecting device when overheating .The surface temperature of the Fuser Cover is under 80 2-10 Service Manual Samsung Electronics . Safety device . GND Type : H/R Bearing Grounding type By SECC Fuser frame 5) Pressure roller .Overshoot : 200 or less .5 % 220 V : 230 + /.30 W . Valid length : 222 mm .3st protecting device : Thermostat cuts off the power .2st protecting device : S/W cuts off when detecting overheating . Voltage 120 V : 115 + /.Printing : 180 + /.The power of Fuser is cut-off after front cover is open. Temperature Resistance : 7 (180 ) . Length : 254 mm . Capacity : 750 Watt + /.The overheating safety device for customer .Length : 239.Stand by : 160 + /. Thermistor Type : FS-50004 (SEMITEC 364Fs Type) .Product spec and feature 1) Heat Lamp .5 (after 30pages) . Thermostat Type : Non-Contact type THERMOSTAT . Control Temperature : 150 5 3) Thermistor . Heat Lamp Terminal Shape : Terminal Single Type .5 % .Overheat : 210 or less 4) Heat roller . Product spec and feature 2. The OPC drum rotates as the same speed as the paper feeding speed.. After detecting the /HSYNC signal. It scans the video data received from video controller with laser beam by using the rotation principle of the polygon mirror to create the latent image on the OPC drum. and the engine detects the /HSYNC signal to arrange the vertical line of the image on the paper.1.2. the image data is sent to the LSU to arrange the its margin on the paper.5 LSU (Laser Scanner Unit) The LSU unit is controlled by video controller. It creates the /HSYNC signal and sends it to the engine when the laser beam of the LSU reaches the end of the polygon mirror. The one side of the polygon mirror is one line for scanning. It is the core part of LBP. OPC Drum Photo Diode Polygon Mirror Polygon Motor Motor Driver LD Driver circit Protector panel LD(Laser Diode) Service Manual Samsung Electronics 2-11 . and blade (Doctor blade) .000) . toner cartridge. developing roller.OPC Drum protecting Shutter: None .Toner: Non magnetic 1 element shatter type toner .Product spec and feature 2.Developing Method: Non magnetic 1 element contacting method .000).No disusable toner) .6 Toner Cartridge By using the electronic photo process.Toner remaining amount detecting sensor: None . 2-12 Service Manual Samsung Electronics . and the developer unit has toner.The life span of toner: 3.OPC Cleaning: Collect the toner by using electric static + FILM OPC . supply roller.000 sheets (ISO 19752 Pattern/A4 standard) . it creates a visual image.Management of disusable toner: Collect the toner by using electric static (Clenerless Type.2.Classifying device for toner cartridge: ID is classified by interruption of the frame channel. Sales(2. The OPC unit has OPC drum and charging roller.1. In the toner cartridge.Toner Cartridge : Initial(1. the OPC unit and the developer unit are in a body. PWM controller and Bi-polar Stepper Motor Controller and has USB and IEEE 1284 Parallel Interface capacity. SMPS OPE B'D (Build-in HVPS) HVPS Main Controller LSU Jupiter IV ASIC for 2510 SPGP V3 for 2570/2571N V1.0 USB for 2570/2571N DRAM 8M Byte for 2510 32MByte for 2570/2571N Printer Engine B'D Motor Flash Memory for 2510 8MByte for 2570/2571N 2. I/o . each Driver and PC Interface Main Control operate its full function on the Main B'd and CPU control Controller ASIC.2. 2.2.1(a) Main Control ML-2510/2570/2571N of Main Control are composed of CPU and Print and operate follows function by CPU .2. Main Controller uses Jupiter4E for ML-2510 and SPGP V3 for ML-2570/2571N. which is built in Memory.2.1 USB for 2510 V2. They control system by operating operation block of the system. while ML-2570/2571N sue SPGP V3.Bus Control.1 H/W Overview ML-2510/2570/2571N is roughly made up Main Control part and SMPS/HVPS part.Product spec and feature 2.2.2.2. which is on chip micro controller and developed for Low-end Laser Beam Printer. Jupter4E and SPGP V3 provide provides the integrated printing functions such as Printer video controller.Handling.1(b) CPU ML-2510 Use 32Bit RISC Processor of Jupiter4e.2 H/W Structure and Descriptions 2. Service Manual Samsung Electronics 2-13 . Laser Scan Unit controller. Product spec and feature .8M capa : 8M Byte basic for ML-2510 8M :Printing System Working Memory Area .3V .1(e) ENGINE This recording method is electrophography method using LSU. ML-2510 uses 0. Envelop .6ms below 2.Folio : 208 x 325 mm . OHP. use Band Buffer. Manual : N/A((DRIVE Selection : Paper.POWER ON RESET TIME : 6.2.Operation Frequency : 150MHz for ML-2510/400MHz for ML-2570/2571N .2.Legal : 208 x 350 mm .Top Margin : 4.23 ° 3 mm . System Working Memory Area .A4 : 202 x 291 mm . Width = 76 ~ 216mm.Main Function Block: Completely Integrated System for Embedded Applications.000pages Printing(A4.5M Byte ASIC built flash memory .2. 5% Pattern Printing) 8) First Print Out Time : within 9sec( Standby ) 9) Warming up time : within 15sec (Ambient : 25° ) 2-14 Service Manual Samsung Electronics .2.1(d) DRAM When Printing. printing pages from 2nd to last during 1min) 3) Recording Density : 1200 x 600dpi 4) Cassette Capa. 1) Recording Method : LSU(Laser Scanning Unit) 2) Printing Speed :24ppm (In continuing printing base A4.2. Right Margin : 4.Access Time : 70 nsec 2. : Cassette : 250sheets(75g Base).Letter : 208 x 273 mm .2.Manual. Length = 125mm ~ 356mm 6) Effective recording size .32M capa : 32M Byte basic for ML-2570/2571N 32M :Printing System Working Memory Area .Access Time : 60 nsec 2.23 ° 3 mm 7) CRU(Toner Cartridge)Life : 3. . 32 Bit Risc Architecture for ML-2510 and ARM10 CPU for ML-2570/2571N ARM9 CPU LSU Interface Module for Interfacing PVC with LSU 2 Channel General Purpose DMA Controller for High Speed I/O Dual Memory Bus Architecture . which toner is composed of 1 component and non magnetic.Operation Voltage : 3.Left.1(c) Flash Memory Store System Program and can be down load System Program through PC Interface .Capacity : 8M Byte for ML-2570/2571N.1 sheet) 5) Paper Size : Cassette . Main Board control to send Current Imagedml Video Data to LSU to print and have motor Driving and Circuit for the current driving and also include Paper Exit Sensor. panel s/w. < ML-2510 > < ML-2570/2571N > Service Manual Samsung Electronics 2-15 .Product spec and feature 2.2.2 Main Board Main Board are composed of Engine and Controller on the one-Board.2. Cover Open s/w. A3977 . 24C32 for ML-2570/2571N.Product spec and feature U6(Jupiter 4E for ML-2510 and SPGP V3 for ML-2570/2571N) . If a harness is not normally connected to this connector. LSU connector(CN12) .It is an EEPROM with 12C method. SDCLIC is 100Mhz for ML-2570/2571N. Built in Flash Memory.3V for operation voltage and I/O.ML-2510 use Jupiter4E which has a CPU core CLK with over 150MHz and a System bus 80MHz. supplies the power.It connects a LSU. SDRAM .It interface the computer.Main memory.It supplies the core sltage to CPU by Converting 3.It Supplies the core voltage to CPU by converting 3. SDCLK is 75Mhz for ML-2510.It connects SMPS. . HVPS connector(CN10) . It uses 80MHz for system bus CLK.It is an Main motor driver IC and controls the motion of main motor.It interface the computer. DC Motor connector(CN11) . . . Network Connector(ML-2571N only) .8V for ML-2510 EEPROM(U8 : 93C66 for ML-2510.It connects a HVPS.It connects an main motor and drive a DC motor.ML-2570/2571N use SPGP V3 which has a CPU core CLK with over 400MHz and a System bus 100MHz.It use 3. SMPS connector(CN8) . DC To DC Converter . Regulator . and delivers the high voltage contol signal.3V to 1. etc.3V for ML-2570/2571N 2-16 Service Manual Samsung Electronics .It interface a DCU-JIG USB connector(CN6) . DCU connector(CN1) .3V to 1. power cannot be supplied.It interface the network IEEE 1284 Parallel Connector . AHB(75MHz).8V power operation . 32MB Special function Register Area 5.3V tolerant input and bi-directional I/Os . 1.SDRAM and IO Address / Data signals multiplexing 2.Allows to access peripheral devices such as GPIO control logic 6.Programmable refresh interval 8. . APB(75MHz). Directly connected to 3 external IO banks (IOC) .Product spec and feature 2. Directly connected to two SDRAM banks (SDRAMC) .2.Internally flash memory read / write operation support . hold timing . Directly connected to 1 external ROM bank (ROMC) .2.AMBA AHB used for high speed bus transactions between masters and slaves .AMBA APB used for low speed bus transactions between ARM core and peripherals .One external flash memory attachable. One Chip Laser Beam Printer Controller .Support for SDRAM configurations including programmable column address .4MBits (128Kx32bits) .Single memory bus architecture 3.Programmable Interrupt Enable/Disable Service Manual Samsung Electronics 2-17 .3(a) Introduction Jupiter4E is One-Chip micro-Controller for Low cust Laser beam Printer.3 PLLs ( 2 Dithered PLL and 1 General PLL) first for CPU(150MHz).Programmable recovery time for slow devices .Serial programming mode using flash programmer tool .75MHz core frequency operation . second for USB(48MHz) third for PVC(59MHz) . Integrated ARM940T 32-bit RISC embedded processor core . Interrupt Controller (INTC) .1.Two external SDRAM attachable.Harvard Architecture Cache : 4KByte Instruction cache. Built in Flash Memory .FIQ or IRQ mode operation selectable .2.GDI only . 7.Programmable access timing control 4.32 MB size for one ROM bank .SDRAM controller supports PC-100 and PC-133 SDRAM running at 75MHz .Extensible architecture . 4KByte Data cache .3 Asic(Jupiter 4E) Specification 2.32 MB size in each IO bank .3.2. access. .Up to 32MB per bank.Programmable setup.75MHz system operation . .2 channel Independent Full Duplex UART . A4 : 20ppm) .THV.Version 1.21 ppm.Interrupt based phase change operation 16. no DMA based interface support . Timer . PWM Controller .Watch Dog Timer for S/W Trap 17. .Project code added. .Programmable Baud Rate .Four 128x8 FIFOs for Data transmission.USB wrapper for AHB interface . .4 PWM output ports .Laser Scan Unit (LSU) Interface for Laser Diode turn on/off timing control . . USB interface .3 Independent Programmable Timers . ADC Interface .20MHz video rate (Hummingbird 2 : letter . . Miscellaneous . Printer video controller for LBP engines (PVC) . BIAS.Programmable Bus Master Priority. Laser Scan Unit (LSU) Controller .Auto Power Control for Laser Diode with PID control method using internal 10 bits DAC.video data transmitted through LSU Controller 12.Sample & hold period generation. 14.programmable phase and interval time .Mutual exclusive GPO/GPIO ports control by the port control enable register . 28 GPO & 5 GPIO ports .Max 16 byte FIFO to handle SIR Bit Rate Speed 11.LSU clock generation .Programmable ADC Clock Cycle.fixed hardware phase and current table . Serial port interface (UART) . .Product spec and feature 9.Automatic or Manual AD Conversion support.AHB Bus interface 10. Interrupt based operation support .Polling.Interrupt based input / output interface.Brushless DC motor control clock generation 13.1 . FAN control and AC ELECTRIFICATION 15. Bi-polar Stepper Motor controller (MOTORC) .Mux controlled 24 GPI. .4 channels ADC interface for analog devices such as temperature sensor.Phase generation for the purpose of paper feeding .4 Special Function Registers for monitoring the ADC results for 4 channels. 2-18 Service Manual Samsung Electronics . nACK. PERROR. nSLCTIN. SELECT. D EC.3(b) Jupiter4E Internal Block Diagram AHBC ( ARB. MU X) TMS TCK TDI TDO nTRST SCL ARM CORE ( ARM940T I / C 4 KB D/ C 4 KB ) ( SDA FL AS H CORE mfl130_128Kx32 ) PROGRAM ENEXHV EXHV DC2-0 TIC nSRAS PVC PPD[7:0] nSTROBE.2. nAUTOFD A H B A H B nSCAS SDRAMC ( EXT : 2 CH) nSCS DQM1-0 BA1-0 SCKE ADDR18-0 ADDR / DATA PPI BUS M U X DATA15-0 nSWE/nWE PDE.Product spec and feature 2. nFAULT nIOCS1-0 nIOCS2_WE I OC ( 3 CH) RXD1-0 TXD1-0 nIOCS2_OE nIOCS_ALL nROMCS nOE / ROM C (1 CH) UART D+ DDpullup VBUS USB CORE ( USB1 . BUSY. pll 2073x) PW M PWM3-0 CL O CK & RESE T M OT OR C MOTPAT5-0 Service Manual Samsung Electronics 2-19 .2.1 ) A P B APB BRI D GE nLREADY nHSYNC VDO INTC L SUC ( dac1264x_1455) LSUCLK SHPERIOD nLDON TCU DACOUT BLDC_CLK GPIO4-0 GPO27-0 TEST OM2-0 MISC AD C INTERFACE ( adc1275x_pc) ADCIN3-0 nRESET XI XO CAP2-0 SCLK EXTCLK PL L ( pll 2096x. nINIT. 8/16Bits. 33/66MHz .Capacity : 32M Byte(STD/MAX) . etc.Full IEEE 802. PVC 2.LVDS Pad(VDO.2.PCI Local Bus Specification rev2. It stores Font List.2. compressed into Flash memory.ADC : 6 Channels I2C Controller .3 Compatibility Engine Controller .Type : SDRAM 100MHz/133MHz. System Working Memory Area. and in case of model for export it compresses the PCL font. PCI.4 Channels HPVC .I2C(S-BUS) Slave Device Support(I2C Version 2.Host / Agent Mode (Support 4 Devices in Host Mode) NAND Flash Controller .LSU Interface Unit .6 Banks (Up to 16MB per Bank DMAC .CPU Core : over 300MHz . when printing.Product spec and feature 2.2.10M/100Mbps .32Bits. . .Step Motor : 2 Channels .32Bits Only.32KB instruction cache and 32KB data cache Operating Frequency . 100MHz . on DRAM and uses it as PCL font in case of model for export. 4KB) MAC .Capacity : 8M Byte (Nor Flash) .1) RTC .System Bus : 100MHz SDRAMC .Random Access Time : 10 us (Max) .4 Banks (Up to 16MB per Bank) IOC .5 Banks (Up to 128MB per Bank) ROMC .2 Complaint . HSYNC) UART .Dual/Single Beam . then stores it.Auto Boot Mode (Using Internal SRAM.3 PLL : MAIN.2. 16bit 2-20 Service Manual Samsung Electronics .3(d) Memory Flash Memory : It stores System Program and downloads the System Program through PC Interface.5 Channels (1 Channels Supports DMA Operation) PCI Controller .Serial Page Access Time : 50ns (Min) DRAM : It is used as Swath Buffer. H/W EEC Generation .3(c) Asic(SPGPv3) CPU Core : ARM1020E .RTC Core Voltage : 3V PLL .PWM : 8 Channels . 2.3(e) SPGPv3 Internal Block Diagram Service Manual Samsung Electronics 2-21 .Product spec and feature 2.2. Capacity : The 32M Byte is for this model (32M :Printing System Working Memory Area ) 2-22 Service Manual Samsung Electronics .3(g) SDRAM It is used as swath buffer.2.2.2.2.3(f) Flash Memory It stores the system program and downloads system program through the PC Interface. system working memory area. Capacity : 8M Byte (NOR Flash) Random Access Time : 10 us (Max) Serial Page Access Time : 50ns (Min) 2.Product spec and feature 2. while Printing. etc. 4(c) Jam Cover/Cover Open Sensing ML-1610 uses two M/S:one senses the cover open and the other senses the jam cover open. +24V supplied to each unit (DC fan. informs the existing OPC unit to CPU. it informs the status to user by turning on the red LED among OP panel LEDs.Main Motor.4(d) Solenoid Driving Circuit The solenoid consists of two used for paper pick-up and MP signal. a paper jam0 (CPU#_) occurs.2. ML-1610 differs from other general printers because it doesn’t have a paper empty sensor.2. and then stays at the status. If a paper is not fed.2. Main Motor. 2. In this case.2.4(a) Paper Feeding/Width When a paper passes an actuator of a feed sensor unit after feeding a paper into a set.it detects a signal of the photo interrupter and informs the paper feeding status to CPU. and D7 bit of CPU detects the existence of OPC. Service Manual Samsung Electronics 2-23 . Paper senses the on/off time of the empty sensor by using CPU and informs the normal operation status and the jam occurrence status to CPU. 2.(Related in Paper Front Edge Adjustment) If it could not detect the feed sensor within 1 second after feeding a paper.Solenoid.Product spec and feature 2.4(b) Paper Empty Sensing The paper empty is detected by the empty sensor mounted to an engine board and the actuator mounted to a frame. The diode protects the drive TR from the pulse (noise)generated by de-energizing operation of solenoid.2. The jam cover open sensor is located on the left bottom of SMPS. Solenoid. +24V supplied to each unit (DC fan. it recognizes the state as no paper (Red and Yellow lights turn on among other LEDs). D0 bit of CPU detects the jam cover open/cover open. and its driving time is 300ms.When the front cover is open. After OPC unit is mounted. With the same principle. Polygon Motor Unit of LSU in Fusing Unit. It recognizes the paper existing status by using a firmware. When it passes the actuator of sensor unit. D4 bit of CPU turns it on/off.2.2.and HVPS)is interrupted.Polygon Motor Unit of LSU in Fusing Unit. it senses the OPC unit.2. and HVPS) is interrupted.2.2. The cover open sensor is located on the left bottom of HVPS. When the jam cover is open. it strews an image data. After sensing the signal and certain time later. 2.the actuator operates. it detects the signal of the photo interrupter.4 Sensor Controller 2. 2. It takes 110V/220V and outputs the +5V. It is consisted of the AMPS part. which supplies the DC power for driving the system.5 SMPS board (Switching Module Power Supply) The SMPS supplies DC Power to the System. and the AC heater control part. SMPS has two output channels. +24V to supply the power to the main board and other board.Product spec and feature 2. Which are 5V and +24V Pin Signal <CON2> Pin No 1 2 3 4 5 6 7 8 9 Pin Name +24VS2 +24V +24VS1 +24VS1 +5V DGND DGND P_REGI FUSER ON 2-24 Service Manual Samsung Electronics .2. which supplies the power to fuser. 12 GND PIN : 8.0A 100mVp-p or less 4W 5W CH2 +24.6V) 2. Falling Time : over 20ms . Running Current : under 40A PEAK (AT 25 . Insulating revisiting pressure : Must be no problem within 1 min. (at 1000Vac. the status when lamp is off or rated voltage is inputted/outputted ) . Common) Service Manual Samsung Electronics 2-25 . Insulating Resistance : 100 or more (at DC 500V) .8 A CH2(+24V) 0.Rated Output Power No 1 2 Items Channel Connector pin CH1 +5V CON 3 5V PIN : 11.25V) 0.0Arms / 2. Leaking Current : under 3.Product spec and feature 1) SMPS Specification .5Arms (But.4 A System AVG : 55 Wh AVG : 350 Wh AVG : 10 Wh .5mA .0V CON 3 24V PIN : 2.Feature . 7 +24V 5% (20.4 ~ 27.0 A 0.AC Input Input Rated Voltage : AC 220V ~ 240V AC 120V / AC 220V(EXP version) Input Voltage fluctuating range : AC 90V ~ 135V / AC 180V ~ 270V(EXP version) Rated Frequency : 50/60 Hz Frequency Fluctuating range : 47 ~ 63 Hz Input Current : Under 4.10mA) .Consumption Power No 1 2 3 Items Stand-by PRINTING Sleep-Mode CH1(+5V) 1.5 A 0.75 ~ 5. 9 +5V 5% (4. 3.7A 500mVp-p or less 60W 65W Remarks 3 4 5 6 7 8 9 Rated Output Max. Output current Peak Loading current RIPPLE NOISE Voltage Maximum output Peak output Protecttion for loading shorage and overflowing current 1ms 1ms .Power Cord Switch : Use . 4 GND PIN : 6. Surge : Ring Wave 6KV-500A (Normal.Power Cord Length : 1830° 50mm . Rising Time : within 2Sec .5A 2.8A 1.0 A 1.4 A 2. COLD START) under 50A PEAK (In other conditions) . Out Voltage Rising Time : 50 ms Max . and recalculate it to resistence . . and the outputted high voltage is supplied to the toner. of environment sensing voltage is input and get feed back current.Output Voltage: -350V 4. 1) Transfer High Voltage (THV+) . Power Save 2.Loading contrast : 5 % or less .Out Voltage Rising Time : 100 ms Max . EK. MIC.6% .CB. CE.Out Voltage Falling Time : 50 ms Max .transfer Active signal.Input Voltage Variation : 5 % below(Variation 21. OPC cartridge. 90% Duty : +5KV 5% 2) Charge Voltage (MHV) . 10% Duty : +650V.Output Voltage Fluctuation range: PWM Control . C-UL.Transfer Variation Voltage on Environment Variation : +650 V(Duty 10%) ~ 5KV (Duty 90%) . CCC(CCIB).EMI Requirement : CISPR .Control Method on environment : THV-PWM ACTIVE.3KV ° 15% (Cleaning.GOST. EPA.Semko.FCC. . Maintaining temperature range : -20 40 .Out Voltage : Max.5 .Out Voltage Trigger : 6.Output Control Signal(MHV-PWM) : CPU is HV output when PWM is Low 3) Developing Voltage (DEV) .6V°≠26. CSA950.Control method on transfer output voltage : It is controlled by changing its duty of THVPWM Signal as follows.2.6 HVPS board (High Voltage Power Supply) The HVPS board creates the high voltage of THV/MHV/Supply/Dev and supplies it to the developer part for making best condition to display the image.Out Voltage Range : 30 ~ 1000 .Product spec and feature .Out Voltage : -1.200 ) .2.IInput Voltage : 24 V DC 15% . +1. The HVPS part takes the 24V and outputs the high voltage for THV/MHV/BIAS.Environment Condition . Operating atmospheric pressure range : 1atm . Preserving Humidity Condition : 10% ~ 90% RH .Output Voltage Rising Time : 50 ms Max 2-26 Service Manual Samsung Electronics .Input Voltage : 24 V DC ° 15% .Input contrast of the output stability degree : 5 % or less .Input Voltage : 24 V DC 15% .Safty Requrement : IEC950 UL1950. and transfer roller.2% .3KV ~ 3.4V) Load Variation : % below .Out Voltage Falling Time : 100 ms Max . Operating temperature range : 0 40 . Output Loading range : 10Mߟ ~ 1000 . Input Service Manual Samsung Electronics 2-27 .Output Voltage : -550 V 8.Output Voltage Falling Time : 50 ms Max .Output Voltage Falling Time : 50 ms Max .Output Control Signal (BIAS-PWM) : the CPU is HV output when PWM is low.6%(ZENER using.Loading contrast : 5 % or less .Product spec and feature . 4) Supply .Output Loading range : 10 ~ 1000 .Input contrast of the output stability degree : under 5 % .Output Voltage Rising Time : 50 ms Max .Output Control Signal (BIAS-PWM) : the CPU output is HV output when PWM is low. DEV ) . a semiconductor switch. and then the heat lamp is turned off. the PC1 is off. the voltage is cut off at the gate of Triac.7 FUSER AC POWER CONTROL Fuser(HEAT LAMP) gets heat from AC power. the AC control part is passive circuit. High Repetive Peak Off State Voltage : Min 600V 2-28 Service Manual Samsung Electronics . so it turns the heater on/off with taking signal from engine control part. As a result. and heat is occurred.2. 1) Triac (THY1) feature :16A. The AV power controls the switch with the Triac. the AC current flows in the heat lamp. The 'ON/OFF control' is operated when the gate of the Triac is turned on/off by Phototriac (insulting part). when the signal is off. the Triac becomes off. On the other hand. the Triac part (light receiving part) takes the voltage. From the flashing light. and the voltage is supplied to the gate of Triac and flows into the Triac. the LED of PC1 (Photo Triac) takes the voltage and flashes. Turn On If Current : 16mA .2. When the 'HEATER ON' signal is turned on at engine. 600V SWITCHING 2) Phototriac Coupler (PC3) . In other words.Product spec and feature 2. 2.Engine Main Control. 2. . Interface Control and Sensing & Unit Control Module.3 S/W Structure and Descriptions The purpose of this document is to describe the design specification of the Engine Control F/W for the ML-1610. Major operations of the Engine Control F/W are following.Control the LSU .Control the HVPS for the Developer Process . this firmware monitors the enable print command from the main system. This firmware is executed every 10msec as an interrupt routine of the main system.2 Engine Control F/W Overview Engine Control F/W is executed every 10msec by timer interrupt of main system.3.Control the Pick-Up.3. 2.1 Introduction This Engine Control Firmware is a program that controls LBP Engine of the ML-1610. If the enable print command is detected. Feeding and Discharging of Paper . .2.2. this firmware controls the Engine Mechanism according to the printing process and paper feeding state. And it consists of 3 control modules. .Control the Temperature of Fixing unit Controlling selection to here is added. At stand-by state. this firmware controls the Engine state.Second Cassette Feeder(SCF) : N/A Service Manual Samsung Electronics 2-29 . And with the Sleep command or Wake-Up command.Product spec and feature 2. Product spec and feature .Architecture of Engine Control F/W Main F/W of the printer controller Power On Initial Engine F/W Device Units Fixing Unit LSU HVPS Engine Main Control Module Fan Unit Motors Solenold & Clutch Interface Control Module Sensing & Unit Control Module Hardware Devices & Mechanical Device 2-30 Service Manual Samsung Electronics . Probably from usual state it will be able to rehabilitated a prior to entry error state in error condition it is to confirm. However. it does not indicate an error.3.2.e. The other is a function that informs the main system of the current engine status for the requested item. One is a function to receive the command from the main system. When the if rehabilitation is possible then after rehabilitating it goes back in usual state. There are three control modules. . it is formed that an error occurrs. Currently the rehabilitation function of the low heat error . Engine Main Control Module. It stores the present temperature and supplies the heat to the fixing unit during the scheduled time.3. And the engine checks the LSU error in itself. If the temperature goes up after scheduled time.. else with an error condition it goes in error state. The second one is a fixing unit control function. If the temperature goes down after scheduled time. The first function is an ADC function that reads the ADC values of the temperature of the fixing unit. And the last one sets the flag that describes the present status of each sensor. . 2.4 Engine Interface Module Design Engine Interface Module communicates with the main system in order to receive the command from main system and to transmit the present engine status for the requested status. This function regulates the temperature of the fixing unit within a fixed range to be set by the paper type and the number of pages to print out. The third one is a fan control function that controls the fan unit. If the error doesn’t happen. And then the engine mode is changed to recovery mode and the engine informs the main system of the engine mode.Low Heat Error When the error occurrs. it informs an error first. it goes back to a normal state.Product spec and feature 2. There are two sub functions. if not. if the LReady or Hsync error happens. If even time when it judges an error.2. then it goes back to a normal state.3 F/W Architecture of Engine Control Firmware . the printing job will be proceeding. 2. the over heat error and the LSU error is embodied. However.3. It stores the present temperature as well and waits a scheduled time. if not.Lsu Error When the error occurrs. the paper exits out beforehand. .5 Engine Sensing & Unit Control Module Design Engine Sensing & Unit Control Module consists of 4 sub-functions. it does not indicate an error. Engine Interface Module and Sensing & Unit Control Module. i.2.Over Heat Error When the error occurs. it is formed that an error occurrs. It accomplishes printing only again. it informs an error. . Concretely speaking. Service Manual Samsung Electronics 2-31 .The Engine Control Module is executed every 10msec as interrupt job of main system. Product spec and feature .. . ) Control the fixing unit & Check error condition for the fixing unit Control the fan unit Get status value of each sensor & Set present status flag of each sensor 2-32 Service Manual Samsung Electronics .F/W Architecture START Global Timer Increment Get A DC Value (Tempe rature. 4. Make sure that the printer has been packed with the following items: 2. Service Manual Samsung Electronics 2-33 . Grasp the front cover and pull it toward you to open.Product spec and feature 2.4 Initial Product Installation 2.2.1 Accessory List Remove the printer and all accessories from the packing carton.2.4.2 Installing the Toner Cartridge 1.2. 3. one on each side. Locate the cartridge slots inside the printer. Gently shake the cartridge from side to side to distribute the toner evenly inside the cartridge. 4. 2-34 Service Manual Samsung Electronics .Product spec and feature 2. Remove the toner cartridge from its bag and remove the paper covering the cartridge. 6. If the cover is not firmly closed.Product spec and feature 5. printing errors may occur when you print. Unfold the toner cartridge handle and grasp it. Insert the cartridge in the printer until it snaps into place. Close the front cover. Make sure that the cover is securely closed. Service Manual Samsung Electronics 2-35 . 1. Make sure that all four corners are flat in the tray.4. Pinch the rear guide and pull it out to extend the tray. 2. Grasp the paper input tray and pull it toward you to open.Product spec and feature 2. Prepare a stack of paper for loading by flexing or fanning them back and forth. 2-36 Service Manual Samsung Electronics . 3. Load paper with the print side facing up.3 Loading Paper You can load approximately 150 sheets of paper in the tray.2. Straighten the edges on a level surface. 2. Pay attention not to overload paper.2. If necessary. Service Manual Samsung Electronics 2-37 . Connect the other end of the cable to the USB port on your computer. 3. you need to connect your printer to your computer with a Universal Serial Bus (USB) cable. Make sure that both the printer and the computer are turned off.4 Connecting a Printer Cable To print from your computer. pinch the rear guide to adjust for the paper length and pinch the side guide and slide it to the left flush against the paper.Product spec and feature 4.4. 5. Paper overloading may cause paper jams. 2. 1. Plug the USB printer cable into the connector on the back of the printer. See your computer User’s Guide if you need help. 2. Plug the other end into a properly grounded AC outlet and turn on the printer using the power switch.Product spec and feature 2. The Demo page shows the printer’s current configuration. 2-38 Service Manual Samsung Electronics . 1. 2. To print from your computer. 2.5 Turning the Printer on 1.6 Printing a Demo Page Print a demo page to make sure that the printer is operating correctly. 2.4. Press and hold down the Cancel button on the control panel for about 2 seconds to print a demo page. you need to connect your printer to your computer with a Universal Serial Bus (USB) cable.4.2. 3. Linux printing software.7 Installing Printer Software The supplied CD-ROM contains Windows printing software. • Windows 98/Me/2000/XP . For details.Product spec and feature 2. Use this driver to take full .advantage of your printer’s features. • Status Monitor allows you to see the printing status of the printer.The following table shows Windows requirements. If you are printing in Linux .4. see Software User Guide.0 of higher Pentium II 400 or higher Pentium II 933 Ghz or higher 64 MB or higher 128 MB or higher 300 MB or higher 1 GB or higher Service Manual Samsung Electronics 2-39 .2. For details. 1. 2. see Software User Guide.Go to Software User Guide for information about installing the Linux driver. System Requirements Your machine supports following operating system. • Printer driver for Windows.You can install the following printer software using the CD-ROM. Item Operating System CPU RAM Free Disk Space Internet Explorer Requirements Window 98/Me/2000/XP Window 98/Me/2000/XP Window XP Window 98/Me/2000 Window XP Window 98/Me/2000 Window XP 5. on-line User’s Guide and Acrobat Reader to view the User’s Guide. If you are printing from Windows . 1 Sample Pattern This product has the several sample patterns for maintenance. check the existence of the abnormality. Adjustment and Troubleshooting 4. The patterns help to regularly maintain the product. Service Manual Samsung Electronics 4-1 .1. With the sample patterns. 4.Adjustment and Troubleshooting 4 4. 1) Hold down the Cancel button for about 2 seconds to print a demo page.1.1.1 Printing a Demo Page Print a demo page or a configuration sheet to make sure that the printer is operating correctly.1 Alignment and Adjustments 4. 4-2 Service Manual Samsung Electronics .Adjustment and Troubleshooting 2) The Demo page or the configuration sheet shows the printer’s current configuration. 1 OP Panel 4. This may take some time depending on the size of the print job.Adjustment and Troubleshooting 4. The On Line/Error LED blinks while the print job is cleared from both the printer and the computer. you can’t cancel the print job by pressing this button.2 Cancel button LED Printing demo page Manual feeding Canceling print job Description In Ready mode. Press this button each time you load a sheet of paper in the tray.2. and release.1. and then return to Ready mode. In Manual Feed mode.1. Service Manual Samsung Electronics 4-3 . Press this button during printing. when you select Manual Feed for Source from your software application.2.1. press and hold this button for about 2 seconds until all LEDs blink slowly.2 Control Panel 4. 1.000 Pages(Initial) 4-4 Service Manual Samsung Electronics .000 Pages 3.Adjustment and Troubleshooting 4. 1.000 Pages 50. COMPONENT Pick-up Roller Transfer Roller Fuser Toner Cartridge REPLACEMENT CYCLE 50. The cycle period given below is for reference only. Environmental conditions and actual use will vary these factors.000 Pages(Sales).3 Consumables and Replacement Parts The cycle period outlined below is a general guideline for maintenance.000 Pages 50. The example list is for an average usage of 50 transmitted and received documents per day. 1.2mm 46. it is due to delinquent or damaged roller. Refer to the table in below and check the condition of the roller.75 8 BIN PATH 1 2 3 4 OPC Drum Charge Roller Supply Roller Developing Roller 5 6 7 8 Transfer Roller Heat Roller Pressure Roller Feed Roller Service Manual Samsung Electronics 4-5 .7mm 47.2mm 77.4 Periodic Defective Image If the delinquent image regularly occurs in the printed-paper.4mm ? Typical defect white spot on black image or black spot black spot light or dark horizontal image band horizontal image band image ghost Black spot and image ghost. H/R : black spot on the backside ? 24.5mm 37. No 1 2 3 4 5 6 7 8 Roller OPC Drum Charge Roller Supply Roller Developing Roller Transfer Roller Heat Roller Pressure Roller Feed Roller Defective image 75.5mm 35.Adjustment and Troubleshooting 4.7mm 75. 4-6 Service Manual Samsung Electronics .5.1. ALL HV & FAN ON THV(+) REFERENCE ON OFF STATUS CODE 61 WARM UP 00 01 02 03 04 20 30 40 50 69 READY READY READY READY READY (REGAL) (LETTER) (A4) (EXECUTIVE) (B5) PRINT START FEED SENSOR ON FEED SENSOR OFF PAPER OUT SLEEP MODE ERROR STATUS CODE 60 62 68 64 70 71 72 73 95 OPEN FUSER ERROR LOW TEMPERATURE ERROR OVER HEATING ERROR COVER OPEN ERROR NO PAPERR PAPER JAM 0 PAPER JAM 1 PAPER JAM 2 LSU NOT READY DIAGNOSTIC MODE DOWN UP SHIFT STOP ENTER TO ENTER DIAGNOSTIC MODE. ML SERIES DIAGNOSTIC CONTROL UNIT 04 DEV 300 05 LSU READY 07 PAPER EMPTY 08 DEV 350 LSU MT & LD PAPER WIDTH EXIT SENSOR DEV 350 LSU MOTOR NEW CRU FEED SENSOR SELF TEST STATUS DIAGNOSTIC 09 COVER OPEN 10 COER HEATING PRINTING TEMP READY HEAT ON DIAGNOSTIC CODE 00 01 02 03 04 05 06 07 08 09 10 11 12 13 14 MAIN MOTOR OPERATING SYSTEM MAIN HIGH-VOLTAGE ON TRNSFER HIGH-VOLTAGE (-)ON THV(+) REFERANCE VOLTAGE DEV/SUPPLY HIGH-VOLTAGE ON/PTL ON LSU OPERATING SYSTEM PICKUP CLUTCH ON PEEMPTY/PWITH/NEW CRU TEST FEED & EXIT SENSOR TEST COVER OPEN SENSOR TEST FUSER TEST HOT BURN TEST CLEAN MODE PRINT THV(+)TRIGGER.1.Adjustment and Troubleshooting 4. open the front discharge cover and leave the connect the harness wire(10 pin/4 pin) to the CN1(ML-1610) of the Main control board. PUSH THREE BUTTONS SIMUL ANEOUSL AND TURN THE PRINTER POWER ON.1 DCU Setup You can examine the malfunction of the printer. To perform DCU.5 How to use DCU 4. 21: MP.05: Folio. The paper has passed out of the Feed Sensor. The Out bin is filled with paper.1.03: EXEC . 64 65 70 71 72 73 76 95 Cover Open CRU Error No Paper Paper Jam 0 Paper Jam 1 Paper Jam 2 Out Bin Full LSU Not Ready Service Manual Samsung Electronics 4-7 . 00: Legal . The front part of paper is jammed between the Discharge sensor and Feed sensor. the paper is detected when the first paper is printed. it indicate the position of the paper Code 61 00~05 20.Adjustment and Troubleshooting 4. 62. • 60: Open Fuser Error • 62: Low Heat Error • 68: Over Heat Error The Printer Cover is open. 22: SCF The paper is passing out of the Feed Sensor. The printer is ready. Low Temperature Error occurs.01: Letter . It show 7 Segment FND on the panel and each code tells the function of the printer.2 Code Connect DCU to the printer and turn the power on. No paper in the paper cassette. 21. The Toner Cartridge not installed. LSU Scanner Motor not ready or Hsync signal not output. Code 60. 06: A5/A6 The engine controller received the print order from the video controller.02: A4 . There is a short circuit in the thermistor and the thermostat while printing. The front part of paper is jammed just after passing through the discharge sensor. the printing is stopped to indicate error code. The paper has passed out of Exit Sensor. 1) Normal Code While printing or warming up. 22 30 40 50 69 State Warm up Ready(kind of paper) Print Start Feed Sensor On Feed Sensor off Paper Out Sleep Mode Description The printer is on.04: B5 . The front part of paper is jammed between pickup unit and Feed sensor. The fuser power turned off to minimize the power consumption.5. 68 State Fuser Error Description The error in the fuser occurred. the cover is open or close. 20: 1st. 2) Error Code When detecting the malfunction. Press the [Up] button to Check LD. Caution : High voltage probe should be used. turn the power on pressing the buttons of [Down]. The left one of the three LEDs in the self-test panel is on when DEV high voltage Supply high voltage output by each HV terminal. press the button [Up] or [Shift] to select the self+test . Caution : High voltage probe should be used. Press the button [shift] and [Enter] together. Release the button within 2 or 3 seconds if 78 shows in the DCU. To stop the operation. Caution : High voltage probe should be used. [Shift] and [Stop] at the same time. press the button of [shift] and [Enter] together. Code 00 Main Motor Operating System Only the main motor is in operation. LD is functioning and the middle button is on. 03 04 DEV/supply High Voltage : DEV/Supply High Voltage Test. Main High Voltage On(THV-) -1400 voltage output by MHV terminal. perform Self Diagnostic Mode to solve the problem. Description 01 02 Transfer High Voltage(-)On(THV-) -1000 voltage output by MHV terminal. Pickup clutch on The Solenoid in the printer is in operation.1.3 Self Diagnostic Mode If Error code occurs due to malfunction of the printer. If the LD is normal. 06 4-8 Service Manual Samsung Electronics . To enter the self-test mode. If 00 shows in the DCU. the right LED of the three buttons on.5. The printer works only in the self-test mode to solve the malfunction problem. all LEDs are on. Caution : High voltage probe should be used. To stop. Press the [Up] button to switch the voltage.Adjustment and Troubleshooting 4. and press the button of [Enter] to operate. 05 LSU Operating System The scanning motor of LSU is in operation. Transfer High Voltage (+)Reference on (THV +) +1300 voltage output by MHV terminal. The middle and right one of the three LEDs are on and -350 voltage output by DEV HV terminal. Fan Test : Indicates the function of the Fan. ALL HV : All high voltage output by each HV terminal and LSU and the fan is in operation. PTL Test : (ML-1610 : not design) Indicates the function of the PTL. Cleaning Mode Print Mode Print the paper to clean the OPC Drum in the Cartridge. same method of the code ‘07’. same method of the code ‘07’. same method of the code ‘07’. the left LED is on and temperature of the fuser is up to overheat Mode. Hot Burn Test If the [enter] button pressed. the right LED is on and temperature of the fuser is up to READY Mode. the middle LED is on and temperature of the fuser is up to Printing Mode. the left and right of the three LEDs are on. THV(+) TRIGGER. same method of the code ‘07’. 08 09 10 11 12 13 14 15 16 17 Service Manual Samsung Electronics 4-9 . Feed Sensor ON/OFF 2nd LED ON/OFF Exit Sensor ON/OFF 3rd LED ON/OFF Cover Open Sensor Test Test the Cover Open Sensor in th same way as code '07’ Cover Open Sensor ON/OFF1st LED ON/OFF Fuser Test If the [Enter] button pressed. If you press the button once more. If the [Up] button pressed. Turn the power off to stop operation. In this mode. Manual Sensor Test : Indicates the function of the Manual Sensor. the printer is continuously printing without detection. Paper Empty Sensor ON/OFF 1st LED ON/OFF Feed & Exit Sensor Test Test the Feed sensor and Discharge sensor in the same way as '07'. Manual Pickup Test : Indicates the function of th Manual Pickup.Adjustment and Troubleshooting Code 07 Description Paper Empty Sensor Test : If activate the Actuator of the PEMPTY Sensor. electronic resistance of transfer roller and high voltage is detected. Adjustment and Troubleshooting No. 00 01 02 03 04 Function Motor MHV THV(-) THV(+) DEV Enter Motor Run Mhv On Thv Negative On Thv On Supply Dev On Up/Down Stop Motor Stop Mhv Off Thv Negative Off Thv Off DEV Dev Off Remark - 1300V -1000V +1300V -350V 0 : -550V 0 : -350V 05 06 07 LSU PickUp PEmpty LSU Run Pickup On On Off Ready LSU Stop Pickup Off 020mV Paper Empty 08 Sensor Exit Feed 09 10 11 12 13 14 15 16 Cover Fuser Hot Burn Clean Print Thv Reference PTL FAN Manual Pic kUp Manual PTL On Fan On Manual Pickup On Fuser On Hot Burn On Clean Printing Cover Open Fuser Off low adequate high PTL Off Fan Off Manual Pickup Off PTL No 17 Sensor Manual Sensor 4.1.5.4 Self Test Button If the Self-Test button pressed, vertical lines are printed. Turn the power on while pressing this button, '89' shows in the DCU and the printer is warming up. After warmingup the printer is in READY Mode, and '88' shows in the DCU. In this mode, without any detection, the printer begins printing(trial printing and data from the PC). It is convenient to use this mode when the engine malfunction is detected in the control board. 4-10 Service Manual Samsung Electronics Adjustment and Troubleshooting 4.1.6 Paper Path 14 15 11 12 13 10 9 8 BIN PATH 1 SMPS 4 LSU 7 Pick-Up Roller 10 Ass'y Holder PAD 13 SMPS 2 Fuser 5 Exit Roller 8 Knock-Up Plate 11 Feed Sensor 14 HVPS 3 Toner Cartridge 6 OPC 9 Knock-Up Plate Down 12 Main PBA 15 Feed Roller 1) After taking order, the printer feeds the printing paper from the cassette or manual feeder. 2) The fad paper passes the paper feeding sensor. (Jam 0 occurs if the sensor is not operated after certain time passes) 3) The paper passed the paper feeding sensor moves to the paper exit sensor via printing process. (Jam 1 occurs if the sensor is not operated after certain time passes) 4) The paper passed the paper exit sensor moves out from the set. (Jam 2 occurs sometime after if the tailing edge of the paper is not coming out from the set after the leading edge of paper passes the paper exit sensor.) BIN PATH BIN PATH BIN PATH Service Manual Samsung Electronics 4-11 Adjustment and Troubleshooting 4.1.6.1 Clearing Paper Jams Occasionally, paper can be jammed during a print job. Some of causes include: • The tray is overfilled. • The front cover has been opened during a print job. • Paper that does not meet paper specifications has been used. • Paper that is outside of the supported size range has been If a paper jam occurs, the On Line/Error LED on the control panel lights red. Find and remove the jammed paper. If it is invisible, look inside the printer. 4.1.6.2 In the Paper Exit Area 1. Open and close the front cover. The jammed paper is automatically ejected from the printer. 2. Gently pull the jammed paper out of the output tray. 3. Open the top cover and inner cover. If you do not see the jammed paper or if there is any resistance when you pull, stop pulling and go to the next step. Caution : • When removing the jammed paper, be careful not to touch the heat roller (located underneath the inner cover). It is hot and could cause burns! • The top and inner cover themselves may also be hot due to the heat roller. Allows the printer to cool before opening the covers. 4-12 Service Manual Samsung Electronics Adjustment and Troubleshooting 4. Close the inner cover and top cover. Then gently pull the jammed paper out. Loosen the jammed paper if it is caught in the heat roller. Service Manual Samsung Electronics 4-13 . Printing automatically resumes. 5. Open and close the front cover to resume printing the document from failed pages. 2. or if you do not see the paper in this area. or if you do not see the paper in this area.6. 4-14 Service Manual Samsung Electronics . If the paper does not move when you pull. Make sure that all of the paper is properly aligned in the standard tray. check the fuser area around the toner cartridge. 2. check the fuser area around the toner cartridge. Remove the jammed paper by gently pulling it straight out. Open and close the front cover to resume printing the document from failed pages.Adjustment and Troubleshooting 4. Remove the jammed paper in the manual tray by gently pulling it straight out.1. In the manual tray 1. If the paper does not move when you pull.3 In the Paper Feed Area In the standard tray 1. reinsert the manual tray. 2. do not expose it to light for more than a few minutes. 3. Cover it with a piece of paper. If necessary. Open the front cover and pull the toner cartridge out.6. Service Manual Samsung Electronics 4-15 . If necessary. 1. Replace the toner cartridge and close the front cover.4 Around the Toner Cartridge Note : The fuser area is hot.1. if necessary.Adjustment and Troubleshooting 4. Caution : • To prevent damage to the toner cartridge. 5. pull the manual tray out. • Do not touch the green surface underside of the toner cartridge. 4. Remove the jammed paper by gently pulling it out. Be careful when removing paper from the printer. If you do not see the jammed paper or if there is any resistance removing the paper. Printing automatically resumes. Use the handle on the cartridge to avoid touching this area. stop pulling and go to the paper exit area. • Do not overload the tray. • Flex.1.5 Tips for Avoiding Paper Jams By selecting the correct paper types. • Ensure that the adjustable guides are positioned correctly. and check the print quality 4-16 Service Manual Samsung Electronics .6. • Use only recommended print media.Adjustment and Troubleshooting 4. • Redistribute toner in the toner cartridge • Clean the inside of the printer • Adjust the print resolution from the printer properties • Ensure that the Toner Save mode is off • Clear general printing problems • Install a new toner cartridge. • Do not remove the paper from the tray while printing.6 Solving Print Quality Problems Print Quality Checklist Print quality problems can be resolved by following the checklist below. damp or highly curled paper. 4.1.6. • Do not use creased. • Do not mix paper types in the input tray. most paper jams can be avoided. • Ensure that the recommended print side is facing up when loading paper into the input tray. fan and straighten the paper before loading. Power On On-Line LED ON? .2 Troubleshooting 4.Power Module error .1 Checking Symptoms Before attempting to repair the printer first obtain a detailed description of the problem from the customer.Alignment & Troubleshooting 4.No Power .4" Print(test pattern) printing Quality is Nomal? Refer to "Solution of Image Problem" END Service Manual Samsung Electronics 4-17 .1.Main PBA On-Line LED Green OK? Indicate "Lamp toggle" Refer to "Chapter 4.2. •Is there are a Print Quality Problem? --> Refer to section 4. •Using the keys print the Test Pattern. • Paper Jam occurs repeatedly at a specific point in the Paper Path --> Open the fuser cover. Check the LED of Panel. (Especially. Print the Information Page (Configuration). compare this with the figures printed and replace as required 4-18 Service Manual Samsung Electronics . switch or SMPS.1. • Is there On-Line LED ON? --> If not check power cable. • Try printing a test page from a computer.2. Jam clear. Check the Power. check if paper fragments are caught in the Fuser 4. 3. 5. switch or SMPS. --> Does the wall socket work? • Do the Motors or other components initialize (listen for main motor. --> If there is an error check cables and driver installation.).Alignment & Troubleshooting 4. --> Does the wall socket work? 2. 6.5 (Page 6-17).2. --> Expected life of various consumable parts.1 Basic Check List 1. fan and LSU sounds)? --> If not or there are none of the normal startup sounds check cable. switch SMPS or Main board. --> Does the wall socket work? • Is the abnormal Lamp? --> Check the main PBA and cable harness. Check the Print Quality. --> Dismantle the machine and carefully inspect the region where the jam occurs. Check consumables (toner etc. Check the Paper Path • Is there a Paper Jam? --> Remove any paper fragments caught in the paper path. • Does "Warming Up" appear on the display? --> If not check power cable. Move the printer away from this type of air pollution 3.2 Initial Inspection 1. The printer does not work no matter how long you wait. Use only paper which is of a suitable quality. Is the printer properly maintained ? Clean the Paper Transport Passages. Ensure the printer is installed in a clean dust free environment. A. Check paper type.(F1) 2. 4.Alignment & Troubleshooting 4. B.1. Is the Power Switch (printer and wall socket) turned on ? B. 4. 1. Check Power part 1. Does the Fan work when power is turned on? A. 5. Move the printer to clean area if necessary. level and free from vibration. Ensure the printer is not positioned in direct sunlight.2. 6. Is the Power Cord connected to the printer correctly ? C. Service Manual Samsung Electronics 4-19 . Check the Installation Environment. Check the connectors on the SMPS. If necessary move the printer. Is the unit rated at the same voltage as the supply ? 2. Ensure that the temperature and humidity of the surroundings are within specification If necessary move the printer. Ensure that the printer is position away from any air conditioning or other heating or cooling equipment. 2. If it is unavoidable use a curtain to shade the printer. Any rollers with dirt surfaces should be cleaned or replaced. Is wall socket working ? E. Also ensure that is not positioned in a direct draft from any air conditioning. Is the Power cord connected to the wall socket correctly ? D. 1. Check the fuses in the SMPS. Some industrial or cleaning processes give of fumes which can affect the printer. Check the overall condition of the printer 1. 3. Ensure the installation surface is flat. fan or open window. If necessary move the printer. weight and size? See the user guide. 2 Bad discharge 1) Wrong Print Position • Description Printing begins at wrong position on the paper.2. Wrong sense time caused by defective feed sensor actuator.Alignment & Troubleshooting 4. Replace the defective actuator 4-20 Service Manual Samsung Electronics . Alignment & Troubleshooting 2) JAM 0 • Description 1. Check the Solenoid by using DCU diagnostic mode 06. 2. Check if the pad is loose due to bad sealing of the side-pad. Replace the solenoid. Check the surface of the roller-pickup for foreign matter. 2. if necessary. Jam-0 occurs if the paper feeds into the printer. Paper is not exited from the cassette. Clean with soft cloth dampened with IPA(Isopropyl Alcohol) or water. Replace the SMPS. HVPS or Sensor. perform DCU to check feed-sensor of the engine board. 1. 3. BIN PATH Service Manual Samsung Electronics 4-21 . If the paper feeds into the printer rand Jam 0 occurs. 4. Replace the side-pad Assembly L or R. Alignment & Troubleshooting 3) JAM 1 • Description 1. 2. Reassemble the Actuator-Feed and Spring-Actuator if the returning is bad. Recording paper is jammed in front of or inside the fuser. Feed Actuator may be defective. If the recording paper is jammed in front of or inside the fuser. 2. BIN PATH 4-22 Service Manual Samsung Electronics . Recording paper is stuck in the discharge roller and in the fuser just after passing through the Actuator-Feed. If the recording paper is stuck in the discharge roller and the fuser just after passing through the Actuator-Feed. 1. (Perform DCU diagnostic code 08) Replace the SMPS. If the paper is stuck in the fuser : disassemble the fuser and remove the jammed paper. • Check the assemblage and performance of the exit. actuator Exit should return to the original position to shut the photo-sensor. • After the paper is completely discharged. 2. Check if the exit sensor actuator is defective. Sometimes it takes longer hour than it should and does not return. • Check if the actuator exit is unformed (Check if the lever part is unformed in shape). BIN PATH Service Manual Samsung Electronics 4-23 . Paper is accordion in the fuser. 2. 1. If the paper is completely fed out of the printer. • It occurs when the Heat-Roller or Pressure-Roller is seriously contaminated with the toner. • Check if foreign matters and wire get caught in the actuator exit's operation.Alignment & Troubleshooting 4) JAM 2 • Description 1. 3. Remove the jammed paper after disassembling the fuser : Clean the surface of the pressure roller with dry gauze. Recording paper is stuck in the discharge roller and in the fuser just after passing through the Actuator-Feed. but Jam 2 occurs : Exit sensor is defective. If the paper is rolled in the Fuser Roller: • This occurs when a Guide claw is broken away or transformed. and clean the surface of the pressure roller with dry gauze. • Check whether burrs occur in the assembly part of the actuator exit or not and if the actuator is smoothly operated. • Remove the toner particles stained on the rib. • It occurs when the Spring of a Guide claw is broken away or transformed. Recording paper is jammed in front of or inside the fuser. Solenoid malfunction (the solenoid does not work properly): Perform DCU Diagnostic Code 06. Pad-Friction is contaminated with foreign matter. 2.) Clean the pad friction with soft clothe dampened with IPA (Isopropyl Alcohol).Alignment & Troubleshooting 5) Multi-Feeding • Description Multiple sheets of paper are fed at once.. Replace the solenoid if necessary. Use the smooth paper.(oil. 1.. The face of paper is blended. 4-24 Service Manual Samsung Electronics . 3. Service Manual Samsung Electronics 4-25 .Alignment & Troubleshooting 6) Paper rolled in the Fuser • Description If contaminated at intervals of 57mm on the back of a paper. After disassembling the fuser. The surface of the heat roller with IPA or water 3. Contamination of the pressure roller or heat roller (Background. Check the claw of the fuser whether it is unfitted. Hot off set). clean contamination between the heat roller and the thermostor and remove the contamination of the pressure roller. If there is heavy background. 1. 2. 1. Check the warp or separation of the sprint claw and the holder plate claw. and then manage it. 2. repair it by the background troubleshooting method. 1. How to remove the rolled in the OPC Drum. The face of paper is curled. 2. • Remove the paper while turning the OPC Drum against the ongoing direction. Paper is too much thin. 4-26 Service Manual Samsung Electronics . Recommend to use normal paper.Alignment & Troubleshooting 7) Paper rolled in the Toner Cartridge (OPC Drum) • Description Paper is rolled up in the OPC. 1. replace the fuser. Replace Fuser. AC wire and Heat Lamp is open. Check if the heat lamp works properly. All the lamps on the operator panel blink. Check if the overheat circuit works properly. 5. Check if the thermistor sensor is in place.2. Service Manual Samsung Electronics 4-27 . Run DCU mode : Perform DCU diagnostic code 10. 2. Gear of the fuser does not work and breaks away melt away. 4. If the thermistor sensor device is located deep in the sponge. Check if the thermostat. Check if the circuit of overheat mode works properly.Alignment & Troubleshooting 4. If the thermostat is open replace the fuser and check following items. When printing. The fuser gear is defective due to melting away. 2. motor breaks away from its place due to defective fuser gear.3 Malfunction 1) All LEDs blinking (Fuser Error) • Description 1. 3. Replace the Main Control board. 3) Not function of the gear of the fuser due to melting away • Description The motor breaks away from its place due to gear melting away. DCU Mode : Perform DCU diagnostic code 05. Check the operation of Fuser Erasing Lamp On/Off with the Error Code Check -10-. 4-28 Service Manual Samsung Electronics . replace the main board. Replace LSU. All lamps on the operator panel blink. 1.Alignment & Troubleshooting 2) All LEDs blinking (Scan Error) • Description 1. DCU Mode : Check if the Error States '60' '62' '68' occur. If you cannot solve the problem after you replace LSU. If the DCU error code 95 is displayed. Replace the Fuser. 2. replace LSU. Alignment & Troubleshooting 4) Paper Empty • Description The paper lamp on the operator panel is on even when paper is loaded in the cassette. 1. Bending or deformation of the actuator of the paper sensor. Replace the defective actuator. 2. The function of the engine board is defective Perform DCU mode : Perform DCU diagnostic code 8. Replace the engine board. Service Manual Samsung Electronics 4-29 Alignment & Troubleshooting 5) Paper Empty without indication • Description The paper lamp on the operator panel does not come on when the paper cassette is empty. 1. Bending or deformation of the actuator of the paper sensor. Replace the defective actuator. 2. The function of the engine board is defective Perform. DCU mode : Perform DCU diagnostic code 8. Replace the engine board. 4-30 Service Manual Samsung Electronics Alignment & Troubleshooting 6) Cover Open • Description The ERROR lamp is on even when the print cover is closed. 1. The Hook Lever in the top cover may be defective. Replace the hook lever, if defective. 2. Check the connector (Engine B’d´HVPS) and circuit of the cover switch department in the Main Control board. Perform DCU mode : If Error state '64' occurs, Check the related codes of the Cover Open Error. 1. Check the insertion of the Cover Open S/W Connect. 2. Replace the Main Control board or Cover Open S/W. Service Manual Samsung Electronics 4-31 Alignment & Troubleshooting 7) No lamp on when the cover is open • Description The ERROR lamp does not come on even when the printer cover is open 1. Check the insertion of the Cover Open S/W Connect. Perform DCU mode : If Error state '64' occurs. 2. Check the related codes of the Cover Open Error 1. 4-32 Service Manual Samsung Electronics . Replace the Main Control board or Cover Open S/W. Check the connector and circuit of the cover switch department in the Main Control board. if necessary. Motor harness or sub PCB may be defective. Service Manual Samsung Electronics 4-33 . Check the motor harness. Perform DCU diagnostic code 00 and Check the motor operation. replace it. if defective. Replace the SMPS. 2.Alignment & Troubleshooting 8) Defective motor operation • Description Main motor is not driving when printing. 1. and paper does not feed into the printer. resulting 'Jam 0'. 1. 1. 4-34 Service Manual Samsung Electronics . Replace the control board. Check if the power input and SMPS output are normal. 2. Check the inferiority of LED-Panel on the front-cover if the LED of Panel does not appear after normal warming-up. 2. all lamps on the operator panel do not come on.Alignment & Troubleshooting 9) No Power • Description When system power is turned on. Replace the LED-panel. Replace the power supply cord or SMPS. Replace LSU. 1. check drive by DCU Mode : LSU Check -05LSU Motor on. Service Manual Samsung Electronics 4-35 . 1. vertical line gets curved. If the supply of +24v is unstable in the Main Control board linking with LSU.Alignment & Troubleshooting 10) Vertical Line Getting Curved • Description When printing. Replace the Main Control board. 2. Run Self-Test Mode : Turn the power on while pressing the test printing button for 2 or 3 seconds before printing works. If the scanner needs to be connected to the printer. Solution 1. check if the printer driver in the controller is set up. check the amount of the remaining tone.Check the power of the printer and perform the SelfTest. Check if the PC and the printer is properly connected and the toner cartridge installed. And check the address of IRQ 7 and 378 4. If the test printing works. check in which program the printing is not working. that means no problems in the printer itself. Check and Cause 1. 3. 2. 4-36 Service Manual Samsung Electronics .2. first the remove the scanner from the PC to see if the printer is properly working alone. the printout is normal within the Windows basic programs. If not working in the Windows basic program. the printer is not working in the printing mode. 3. If it is not working in a certain program. Replace the printer cable. Printing is nor working in the Windows. If you use windows. but it's not working in a particular program. If the test printing does not work. The best way to find out is to open the memo pad to check the function of printing. 2. adjust the setup the program requires.4 Bad Software Environment 1) The printer is not working (1) • Description While Power turned on. Sometimes. If the printer driver is properly set up. that means bad functioning of the printer(not because of software).Alignment & Troubleshooting 4. Check the setup of the port of CMOS is on ECP. If the problems not solved even after the cable replaced. Check if the connection between PC and printer port is proper. Perform DCU to check the Error Status. Check if the printer cable is directly connected to peripheral devices 4. install the new driver again. In such case. Select ECP or SPP among SPP(Normal). and EPP modes(increase printing speed) SPP normal mode support 8-bit data transfer. In this case. The connection of the cable and printer port is not proper. Check and Cause 1.Alignment & Troubleshooting 2) The printer is not working (2) • Description After receiving the printing order. ECP. 4. As a printer port. Secure more space of the hard disk. 2. Reboot the system to print. 3. Secure more space using the disk utilities program. provide more space for the hard disk. while ECP Mode transfer the 12-bit data. If the regular font is not printing. Turn the PC and printer off. 4. Printing error occurs even if there is enough space in the hard disk. the cable or the printer driver may be defective. Service Manual Samsung Electronics 4-37 . no response at all or the low speed of printing occurs due to wrong setup of the environment rather than malfunction of the printer itself. and reboot the system to print again. Solution 1. double-click the printer in my computer If the regular fonts are not printed this time again. 2. If not solved. Check the parallel-port-related items in the CMOS Setup. the cable must be defective so replace the cable with new one. Check if the connection is properly done and if the parallel port in CMOS is rightly set up. Not working with the message 'insufficient printer memory' means hard disk space problem rather than the RAM problem. 3. (The printing job sometimes stops or due to insufficient virtual memory. Solution 1. EPP or SPP in the CMOS Setup. Check the printer in My Computer.Alignment & Troubleshooting 3) Abnormal Printing The printing is not working properly even when the cable has no problem. 2. Check and Cause 1. Printer Driver Error. Set up the parallel port in the CMOS SETUP. the printer driver may be defective or wrong setup in the CMOS Setup.) 3. Error message from insufficient memory.(to see if the printer driver is compatible to the present driver or delete the old driver. (even after the cable is replaced) If the printer won't work at all or the strange fonts are repeated. Delete the unnecessary files to secure enough space of the hard disk and start printing job again. but it actually comes from the insufficient space of the hard disk. • Description 2. if defective and reinstall the new driver) 3. Select SPP(Normal) or ECP LPT Port the among ECP. 4-38 Service Manual Samsung Electronics . check for viruses. 3. 4. • Description 2. In the spool manager. the installed drivers and the list of the documents waiting to be printed are shown.Alignment & Troubleshooting 4) SPOOL Error To spool which stands for "simultaneous peripheral operations online" a computer document or task list (or "job") is to read it in and store it. Delete them and Reboot the Windows to restart printing job. the data being transferred to the printer will be put out and then the document is removed. When some files related to OS are damaged or virus infected. when a printer is finished printing its current document). Service Manual Samsung Electronics 4-39 .jnl. 6. Delete the printer driver completely and reinstall it. the menu is still inactive. 6. Memory is less than suggested one. When expected to collide with other program. Delete the unnecessary files to provide more space to start printing job. If there are some files with the extension name of ****. restore the damaged files and reinstall the program to do the printing job. 4. Before choosing the document. Or put the document out of the list and repeat the routine as in the above or finish the spool manager. Insufficient space of the hard disk in the directory assigned for the basic spool. 2. usually on a hard disk or larger storage medium so that it can be printed or otherwise processed at a more convenient time (for example. Select the document to be deleted and check the delete menu. 5 After rebooting the computer. Shut down all other programs except the current one. How to delete the data in the spool manager. Check and Cause 1. Solution 1. When an application program or the printer driver is damaged. If you intend to delete the current document being printed. if possible. 3. 5. Add up enough memory to the PC. If the previous printing error not solved. Dark black vertical bands are shown in the print-out. 2. 3. Scratched surface of the charge roller in the toner cartridge. Replace the transfer roller if occurred as No. Partly depression or deformation on the surface of the transfer roller. 3.Alignment & Troubleshooting 4. 2. Deformed Doctor-blade or cleaning-blade. Straight thin black vertical lines are shown in the print-out. Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer 1.2. If causes 1 and 2 occur in the toner cartridge. Damaged develop roller in the Toner cartridge. 4-40 Service Manual Samsung Electronics . replace the toner cartridge and try to print out.5 Bad image 1) Vertical Black Line and Band • Description 1. ) Replace the toner cartridge. : Remove the foreign matter and burr of the exposure window. 4. If the problems are not solved. Foreign matter stuck onto the window of internal lenses of LSU mirror. replace the toner cartridge. (toner cartridge) 4. 2. Foreign matter or toner particles between the toner cartridge roller and blade. It may occur when foreign substances are on the OPC Drum. It may occur when Burr and foreign substances are on the window of the toner cartridge frame. white lines or light image occur in front of the image. Foreign matter stuck onto the window : Clean the LSU window with recommended cleaner(IPA) Clean the window with a clean cotton swab. 5. No 3. Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer 1. : Open the front cover and check ribs that corresponds to the position of the voids. Service Manual Samsung Electronics 4-41 . (In case the life of the toner cartridge has been expired. voids occur periodically at the top of a black image.Alignment & Troubleshooting 2) Vertical White Line • Description White vertical voids in the image. No. 3. Remove if found. If the fuser is defective. If the malfunction persists.9mm Pressure Roller = 75.(remove the toner particles and paper particles) 2.2mm Heat Roller = 63. Supply. Develop and Transfer roller.2mm Transfer ransfer Roller = 46. The rollers of developer may be stained.7mm Supply Roller = 47. Clean each voltage terminal of the Charge. (They may not occur periodically. replace the developer. OPC Drum = 75.4mm 1. Bad contacts of the voltage terminals to developer.Alignment & Troubleshooting 3) Horizontal Black Band • Description Dark or blurry horizontal stripes occur in the printing periodically.5mm Charge Roller = 37.) Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer 1. 4-42 Service Manual Samsung Electronics . 2.5mm Develop Roller = 35. Clean the right Gear that has relatively small gap of the teeth in the OPC. 2. cleanly remove foreign substances stuck on the OPC location equivalent to black spots and white spots with a dry duster.5 mm interval unremovable in 1. or black spots occur elsewhere. Clean the inside of the set against the paper particles and foreign matter in order not to cause the trouble. In case of 37. the transfer voltage is abnormal or the transfer roller's life has expired. 3. The transfer roller guarantees 50.5mm interval) Print several OPC cleaning Mode Prints and then run the Self-test 2 or 3 times. take measures as to replace the develop-er cartridge and try to print out.000 sheets printing. Dark or blurry spots occur periodically in the printing 2. 5. In case of 75. the OPC drum surface is damaged.7 mm interval unremovable in 1.7mm interval OPC drum : 75. White spots occur periodically in the printing Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer 1. (Charge roller : 37. If a black image is partially broken.5 mm. If dark or blurry black spots occur periodically. If the roller's life is expired. 2. the rollers in the Developer may be contaminated with foreign matte or paper particles. If faded areas or voids occur in a black image at intervals of 75. Service Manual Samsung Electronics 4-43 .Alignment & Troubleshooting 4) Black/White Spot • Description 1. 1. replace it. Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer 1. Bad contact caused by the toner stains between the high voltage terminal in the HVPS and the one in the set. 4. 2. Replace the developer cartridge and try to print out.Alignment & Troubleshooting 5) Light Image • Description The printed image is light. with no ghost. 3. Replace the HVPS if the problems are not solved by the above four directions. Ambient temperature is below than 10°C. Abnormal output from the HVPS. 1. Check if the Toner Save mode is off. 2. Wait 30 minutes after printer is powered on before you start printing. Develop roller is stained when the toner of toner cartridge is almost consumed. 4-44 Service Manual Samsung Electronics . Clean up the contaminated area by the toner. Check the state of the connector which connects the engine board and HVPS. ( Perform DCU diagnostic code 01) Clean the high voltage charge terminal. Replace the HVPS if not solved by the above direction 1 and 2. No charge voltage in the engine board. Charge voltage is not turned on due to the bad contacts between power supply in the side of the Developer and charge terminal of HVPS. Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer 1. Service Manual Samsung Electronics 4-45 . 2. 1. 2.Alignment & Troubleshooting 6) Dark Image or a Black Page • Description The printed image is dark. Alignment & Troubleshooting 7) Uneven Density • Description Print Density is uneven between left and right. Occur in the developer cartridge. The pressure force on the left and right springs of the transfer roller is not even. 4-46 Service Manual Samsung Electronics . Replace both the left and right Spring Holder. the transfer roller is improperly installed. replace the developer and try to print out. 1. or the transfer roller bushing or holder is damaged. 2. The toner level is not even on the developer roller due to the bad blade. the springs are damaged. 2. replace the developer. Is the HVPS normal? If the problem is still not solved. Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer 1.Alignment & Troubleshooting 8) Background • Description Light dark background appears in whole area of the printing. Service Manual Samsung Electronics 4-47 . 3. and hasn’t it been used long time? The toner cartridge is basically designed to print 2. Does character exist less than 2% per a page. 5. Is the movement(Up and Down) of the transfer roller smooth? Clean the bushing part of the transfer roller. Has the life span of the developer ended? Replace the developer when the life span of it has been ended. 4.000 sheets with 5% image. Does recycle paper be used? The A/S is not guaranteed if using recycle paper. The life of developer is expired. 4-48 Service Manual Samsung Electronics . replace the developer and try to print out.000 sheets) has expired. 2. 4. Wait about 1 hour after power on before using printer. Occur in the developer cartridge.5mm 1. check the transfer roller lifetime and replace it. Clean the terminals when contaminated by toner particles. 5. Abnormal low temperature (below 10°C). Bad contacts caused by contamination from toner particles between high voltage terminal in the main body and the electrode of the Developer.Alignment & Troubleshooting 9) Ghost (1) • Description Ghost occurs at 75. Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer 75.5 mm intervals of the OPC drum in the whole printing. Bad contacts caused by contamination from toner particles between high voltage terminal in the main body and the one in the HVPS board. Replace the engine board if not solved by the above directions 1-2. If not solved by the direction 3. Transfer roller lifetime (50. 3. 5 mm intervals of the OPC drum in the whole printing. Service Manual 4-49 .Alignment & Troubleshooting 10) Ghost (2) • Description Ghost occurs at 75. higher transfer voltage is required. (When printing on card stock or transparencies using manual feeder) Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Samsung Electronics 75.5mm When printing on card stock thicker than normal paper or transparencies such as OHP. Select 'Thick Mode' on paper type menu from the software application and after using returning to the original mode is recommended. Occur in the developer cartridge. replace the developer and try to print out. 2.5mm 1. Digital Digital Printer Printer Digital Digital Printer Printer Digital Digital Printer Printer 47.5mm intervals.Alignment & Troubleshooting 11) Ghost (3) • Description White ghost occurs in the black image printing at 47. The life of the developer may be expired. The abnormal voltage and bad contact of the terminal of the supply roller Check the approved voltage of the supply roller and contact of the terminal and adjust if necessary. 4-50 Service Manual Samsung Electronics . 9mm The temperature of the fuser is maintained high. ( Caution : can be deformed) Service Manual 4-51 . Disassemble the fuser and remove the contaminated toner particles on the roller and clean the foreign matter between Thermistor and Heat roller.5 or 63.5mm(or 63.9mm) intervals.Alignment & Troubleshooting 12) Ghost (4) • Description Ghost occurs at 47. Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Samsung Electronics 47. Alignment & Troubleshooting 13) Stains on the Face of Page • Description The background on the face of the printed page is stained. And perform Self-Test 2 or 3 times to remove contamination. If the transfer roller is contaminated. Toner leakage due to improperly sealed developer. run PC Cleaning Mode Print 2 or 3 times. Replace the developer cartridge. Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer 1. 2. If the transfer roller is contaminated. stains on the face of page will occur. 4-52 Service Manual Samsung Electronics . 2. Pressure roller is contaminated. Perform the OPC Cleaning Mode Print 2 or 3 times. Disassemble the fuser and clean the H/R(Heat Roller) and P/R (Pressure roller). Service Manual Samsung Electronics 4-53 . 1. Run Self-Test to remove the contamination of the transfer roller.Alignment & Troubleshooting 14) Stains on Back of Page • Description The back of the page is stained at 47 mm intervals. Transfer roller is contaminated. clean the area not to be deformed. If contaminated. And check the area between H/R and Thermistor. Digital Digital Pri Digital Printer Digital Printer Digital Printer 1. Replace the transfer roller if contaminated severely. 2. 4-54 Service Manual Samsung Electronics . Remove contamination of the terminals of the developer and the unit. Digital Printer Digital Printer Digital Printer Digital Printer Digital Printer Bad ground contacts in OPC and/or developer.Alignment & Troubleshooting 15) Blank Page Print out (1) • Description Blank page is printed. Remove contamination of the terminals of the developer. Abnormal solenoid. Perform the engine self test using DCU to check if the Solenoid is normal. Blank page is printed.Alignment & Troubleshooting 16) Blank Page Print out (2) • Description 1. delete the data of PC and try printing again. Replace the engine board. Bad ground contacts in OPC and/or developer. 1. If not solved by the above directions 1-2. 3. 2. One or several blank pages are printed. Turn the power off. 3. Service Manual Samsung Electronics 4-55 . 2. 1. several blank pages print. When the printer turns on.(refer to code 06) 2. Before removing any component from the machine. press the hook end of the latch away from the part to which it is latched. release them carefully. 3. Do not force plastic-material components. 5. Be sure to remove the toner cartridge before you disassemble parts. Use a flat and clean surface.Disassembly and Reassembly 3 3. 6. The latches break easily. Make sure all components are in their proper position. Check to verify that documents are not stored in memory. 7. note the cable routing that will be affected. Disassembly and Reassembly 3. Whenever servicing the machine. 2.1 General Precautions on Disassembly When you disassemble and reassemble components. To remove such parts. you must perform as follows: 1. If components are removed. you must use extreme caution. any cables disturbed by the procedure must be restored as close as possible to their original positions. 4. Replace only with authorized components. Service Manual Samsung Electronics 3-1 . The close proximity of cables to moving parts makes proper routing a must. Releasing Plastic Latches Many of the parts are held in place with plastic latches. Unplug the power cord. 2.open the tray. 2.) 2.1 Front Cover 1.Open the front cover.2 Disassembly and Reassembly 3. 1 2 Cassette Tray Front Cover 3.Separate the cover from the lock of the frame by pulling the right bottom of the cover toward the arrow direction.Separate the cassette tray by pulling it out to the left as shown as below.For separating only cassette tray.Disassembly and Reassembly 3. Pull out the front cover to the left as shown as below. 1 2 Cassette Tray 3-2 Service Manual Samsung Electronics .(The front cover and the cassette tray are assembled with the same assembly.2 Cassette Tray 1.Hold the set and lift up the hook on the left bottom toward the arrow direction.2. Remove the 4 screws securing the SMPS Cover and remove it in the direction of arrow. For easy disassembly.2. Jam Cover SMPS Cover (Rear Cover) 2. 1 2 Notice : Remove the SMPS Cover with carefulness That the Fan-DC Harness is not hooked on SMPS Cover. First open the Cover and take out the hook on the right toward the arrow direction. and then take out the Jam Cover to the right side.Disassembly and Reassembly 3.3 SMPS Cover (Rear Cover) 1. remove the Jam Cover. Service Manual Samsung Electronics 3-3 . Separate it by holding the both side of the Main Cover and carefully lifting it up. 3.4 Main Cover (Top Cover & Side Cover L. Remove the 2 screws securing the Main Cover.3) 2. Before Disassembling .Separate the Front Cover (Refer to 3. 3-4 Service Manual Samsung Electronics . 4.Separate the SMPS Cover (Refer to 3.2.2.R) 1. Main Cover Notice : To remove the Main Cover.1) . make sure the right side Power Switch and left side Connectors doesn't get jammed to the Main Cover.Disassembly and Reassembly 3.2. Hold the both ends of the Cover and pull it up bit by bit toward the arrow direction as shown below. as shown below. 5 Cap-SMPS 1. as shown below. Top Cover Side Cover.1) . Before Disassembling . To remove the Top Cover.Disassembly and Reassembly 5.3) .Separate the Main Cover (Refer to 3. Remove the 2 screws from the separated Top Cover as shown below. and then separate the LED Lens from the On-Line Key.Separate the SMPS Cover (Refer to 3.2. R 3.Separate the Front Cover (Refer to 3.R) and unlatch the hooks.2.4) 2.2. Remove the 1 screw and release the Harness from the Cap-SMPS and remove it. Then remove the Top Cover from the Side Cover(L.R). Cap-SMPS Harness Service Manual Samsung Electronics 3-5 . L Main Cover On-Line Key LED Lens Side Cover. as shown below. first remove the 4 screws securing the Side Cover(L. 6.2. 4) 2.6003-000269) 4.6003-000269) HVPS Sheet 3.Separate the HVPS with HVPS ground from the frame by releasing the remaining 3 screws.3) -Separate the Main cover.2. (Screw x 3:Gold_M3. HVPS Ground HVPS 3-6 Service Manual Samsung Electronics . (Screw x 3:Gold_M3.6 HVPS 1.(Refer to 3.(Refer to 3.(Refer to 3.Disassembly and Reassembly 3.2) -Separate the SMPS cover.Remove the sheet by releasing the 5 screws which connects the HVPS and the Sheet. -Separate the font cover.Before Disassembling.Remove the connector from the separated HVPS. (Refer to 3.2. 4.After removing the RX drive. OPC Gear.RDCN Gear.Disassembly and Reassembly 3. Fuser Gear. Separate the RX drive by pulling it out toward the arrow direction.Remove the connector from the separated RX drive.4) 2.7 RX Drive 1.(Refer to 3.Release 2 screws (Screw x 2:Silver_M3. Fuser Gear RDCN Gear OPC Gear Feed Gear RX Drive Note: Please.6001000130)connected to the engine shield and 6 screws (Screw x 6:Gold_M3.Before Disassembling -Separate the font cover. Service Manual Samsung Electronics 3-7 .2) -Separate the SMPS cover. and Feed Gear can be removed from the frame. be careful not to touch the protruding 4 screws at the outside of the RX drive.6003-000296)connected to the frame.(Refer to 3.3) -Separate the Main cover. 3. and then remove the 2 screws from the motor bracket.3) -Separate the Main cover.remove the motor bracket first by removing 4 screws as shown as below. Thermister Fuser 3-8 Service Manual Samsung Electronics .4) 2.(Refer to 3.8 Fuser 1.(Refer to 3.2) -Separate the SMPS cover.2. Gear Bracket RX Motor Motor Bracket 3.Before Disassembling -Separate the font cover.Separate 2 connectors from the SMPS and the Main PBA as shown as below.Disassembly and Reassembly 5.When separating the motor.(Refer to 3. Disassembly and Reassembly 3. F/Down Holder.Separate the fuser by unscrewing 4 screws on the frame.However.be careful that the Roller_Main.the Roller_FR. (Screw x 4:Gold_M3.roller_FR.At this time.and F/Down Holder could get into the inner frame due to the spring’ action.6003-000269) 4. (Screw x 2:Black_M3.the exit roller F/Down can be separated.and spring are separated with theses. Service Manual Samsung Electronics 3-9 . separate the Fuser Dummy cover. Lamp Cover_R Fuser Fuser Dummy Cover Lamp Cover_L 5.Separate the Exit roller F/Down and the exit gear (DRV17)by turning the left/right holder connected to the exit roller F/Down to the arrow direction.Remove the thermo cap by releasing 2 screws as shown as below.roller_main.6003-000282) Roller_FR Holder Roller_Main F/Down Holder Thermo Cap Note : Under the condition that the fuser is connected to the frame.After removing the Lamp Cover L/R. Exit Gear Exit Roller F/Down 6. Separate the Cover-M by releasing 2 screws as shown as below. (Screw x 2:Black_M3. 8. 6003-000196) Cover-M 3-10 Service Manual Samsung Electronics .After pulling out the thermostat as shown as below.Disassembly and Reassembly 7.After separating the CBF harness connected to the left/right side of the halogen lamp.6003-000196) 10.6003-000196) Thermostat Thermistor 9.Release the screw as shown as below. (Screw x 1:Black_M3. remove the CBF harness from its left/right side. release 2 screws from the halogen lamp. and then pull out the thermistor. remove the harness from the cover. (Screw x 2 : Black_M3. 2) -Separate the SMPS cover.Disassembly and Reassembly 11.3) -Separate the Main cover.(Refer to 3.Remove the halogen lamp from the heat roller by pulling it out to the arrow direction.(Refer to 3.9 Engine Shield (Including Main PBA and SMPS) 1.4) 2.Disconnect all connectors except the connector which connects the SMPS to the Main PBA. Thermister Clutch LSU Motor HVPS Fuser Service Manual Samsung Electronics 3-11 .(Refer to 3. Heat Roller Halogen Lamp 3.Before Disassembling -Separate the font cover.2. separate the main PBA connector. perform the follows in order : separate the SMPS cover (Refer to the 3.Disassembly and Reassembly 3. 6003-000269) SMPS Actuator Feed Sensor Lever 5.and then separate the engine shield with carefulness of the actuator feed sensor lever. 6003-000269) Main PBA 3-12 Service Manual Samsung Electronics . For removing only Main PBA. (Screw x 6:Silver_M3.3).Release 6 screws as shown as below. and then take out the main PBA.3). SMPS) 4. separate the harnesses from the shield.For removing only SMPS. separate the fuser connector and the main PBA connector. (Screw x 3 : Gold_M3. release 5 screws. (Screw x 5 : Gold_M3. perform the follows in order : separate the SMPS cover (Refer to the 3. release 3 screws.6003-000196) Engine Shield (W/Main PBA. and then take out the SMPS. 2.9) 2.(Refer to 3. lift up the LSU.(Refer to 3.Before Disassembling -Separate the font cover.2) -Separate the SMPS cover.4) -Separate the Fuser.(Refer to 3.3) -Separate the Main cover.2) -Separate the SMPS cover.6003-000196) Paper Path Frame Service Manual Samsung Electronics 3-13 .(Refer to 3.10 LSU 1.11 Paper Path Frame 1.2.3) -Separate the Main cover.Disassembly and Reassembly 3.(Refer to 3. (Screw x 2:Silver_M3.(Refer to 3.Before Disassembling -Separate the font cover. take it out toward the arrow direction with carefulness of ground and harnesses.4) 2. and then disconnect 2 connectors from the separated LSU.8) -Separate the Engine shield.After releasing 4 screws as shown as below. (Screw x 4:Silver_M3.Release 3 screws as shown as below.(Refer to 3.(Refer to 3.6003-000196) LSU 3. While pressing the hooks on the left/right side of the pick-up housing B. open the front cover.Disassembly and Reassembly 3.take out the transfer roller. pull out the pick-up housing U as shown as below.6003-000301) 1 Bush 2 Solenoid-MP Transfer Roller Bush(L) 3. 1 Housing B Toner Cartridge 2 Sponge Housing U 3-14 Service Manual Samsung Electronics .6003-000196) 4. (Screw x 1:Gold_M3. 2.For separating the pick-up roller sponge.Remove the solenoid-MP by releasing the screw from the left side of the frame. and then take out the toner cartridge.Then.After releasing the 2 hooks from the right side of the frame.2. (Screw x 2:Silver-M3.replace the sponge.12 Pick_Up Roller 1. 1 ML-2510 H/W Block Diagram Service Manual Samsung Electronics 6-1 .System Diagram 6 6. System Diagram 6.1.1 Block Diagram 6. System Diagram 6.1.2 ML-2570/2571N H/W Block Diagram 6-2 Service Manual Samsung Electronics . System Diagram 6.2 ML-2570/2571N Connection Diagram 6-4 Service Manual Samsung Electronics . Machine Life : 50K(pages) Service Manual Samsung Electronics 5-1 . 8MB).MP Cassette : 250 pages / Face Down (100 pages) .Memory : ML-2510(SDRAM.0+IEEE 1284) .4 Paper Path Assembly 5.Emulation : SPL (ML-2510) PCL (ML-2570/ML-2571N) .Speed : 25ppm (Ltr) / 24ppm(A4). ML-2570/2571N(SDRAM. 600dpi .1 Main Assembly 5. 32MB) .1+IEEE 1284).Exploded Views & Parts List 5 5. Exploded Views and Parts List Contents 5-2 5-4 5-6 5-8 5-10 5.5 RX_Drive LASER PRINTER The keynote of Product .2 Frame Assembly 5.Processor : 150MHz Jupiter4e CPU 400MHz SPGP V3 CPU .3 Fuser Unit 5.Fuser Design : Lamp Type .Paper Path : MPF Type Cassette . ML-2570/2571N(USB2.I/O : ML-2510(USB1. Exploded Views & Parts List 5.1 Main Assembly 0 2-5 2-1 2-2 2-3 2-6 2-9 2-7 2-8 2 2-4 5 21 9 4 12 7 11 14 6 1 8 15-1 15-2 10 18 15 16 28 3-4 17 13 20 19 3-2 3-3 3 3-1 5-2 Service Manual Samsung Electronics . Exploded Views & Parts List Main Parts List SA : SERVICE AVAILABLE, SNA : SERVICE not AVAILABLE Drawer# 5.1-0 5.1-0 5.1-0 5.1-1 5.1-2 5.1-2-1 5.1-2-2 5.1-2-3 5.1-2-4 5.1-2-5 5.1-2-6 5.1-2-7 5.1-2-8 5.1-2-9 5.1-3 5.1-3-1 5.1-3-2 5.1-3-3 5.1-3-4 5.1-4 5.1-5 5.1-6 5.1-7 5.1-7 5.1-8 5.1-9 5.1-10 5.1-10 5.1-11 5.1-11 5.1-11 5.1-12 5.1-13 5.1-14 5.1-15 5.1-15-1 5.1-15-2 5.1-16 5.1-17 5.1-18 5.1-19 5.1-20 5.1-21 SEC.Code ML-2510 ML-2570 ML-2571N JC96-04023A JC96-04160A JC61-01155C JC61-01156C JC63-01108B JC63-01105A JC63-01103A JC64-00266A JC66-01242A JC67-00167A JC63-01106B JC97-02654A JC63-01104A JC63-00617B JC63-00628D JC63-01112A JC96-04065A JC63-01107A JC96-03352K JC96-04061A JC96-04062A JC63-01109A JC39-00614A JC44-00101A JC44-00102A JC92-01803A JC92-01804A JC92-01805A JC39-00405A JC39-00400A JC39-00613A JC96-01672A JC61-00031A JC70-40912A JC44-00079A JC63-00722A JC63-00631A 3903-000042 JC61-01726A JC67-00190A Description MONO LASER,24PPM,GDI MONO LASER,24PPM,PDL MONO LASER,24PPM,PDL,N/W ELA UNIT-FRAME_LOWER ELA HOU-COVER GUIDE-STACKER GUIDE-SUB STACKER COVER-M_TOP COVER-M_SIDE R COVER-M_JAM KEY-M_ONLINE ACTUATOR-M_JAM LENS-M_LED COVER-M_SIDE L MEA UNIT-COVER FRONT COVER-M_FRONT TRAY-CASSETTE TRAY-M-EXTENSION LARGE TRAY-M_EXTENSION S ELA UNIT-LSU COVER-M_SMPS ELA UNIT-DEVE INITIAL ELA HOU-FUSER ELA HOU-FUSER SHIELD-P_ENGINE HARNESS-LSU SMPS-WHITNEY+ (V1) SMPS-WHITENY+(V2C) PBA MAIN-CONTROLLER ML-2510 PBA MAIN-CONTROLLER ML-2570 PBA MAIN-CONTROLLER ML-2571N CBF HARNESS-MOTOR CBF HARNESS-HVPS HARNESS-SMPS ELA UNIT-TERMINAL TR L SPRING ETC--HV LARGE ICT-SHAFT HV LARGE HVPS-SKYLARK SHEET-HVPS GROUND-P-HVPS CBF-POWER CORD PLATE-P_CHANNEL CAP-SMPS Location Service Remark O1113 O1036 O1037 O1060 O1059 O1077 O1061 O1118 O1116 O1062 O1115 O1115 O1063 O1025 O1027 O1027 SA SNA SA SA SNA SA SA SNA SA SNA SA SA SNA SNA SNA SNA SA SA SNA SA SA SA SA SA SA SA 110V 220V 110V 220V O1022 O1018 O1024 O1111 O1029 O1100 O1026 O1058 K2903 O1051 SA SA SA SA SA SA SA SA SNA SA SA SNA Service Manual Samsung Electronics 7-3 Exploded Views & Parts List 5.2 Frame Assembly 7 1 6 9 16 11 5 10 14 16 8 13 2 3 12 4 5-4 Service Manual Samsung Electronics 0 Exploded Views & Parts List Frame Assembly Parts List SA : SERVICE AVAILABLE, SNA : SERVICE not AVAILABLE Drawer# 5.2-0 5.2-1 5.2-2 5.2-3 5.2-4 5.2-5 5.2-6 5.2-7 5.2-8 5.2-9 5.2-10 5.2-11 5.2-12 5.2-13 5.2-14 5.2-16 SEC.Code JC96-04023A JC61-01703A JC97-02664A JC97-02670A JC96-04033A JC70-00527A JC70-00528A JG66-40003A JC66-01257A JC63-00622A JC61-01258A JC61-01259A 6107-001297 JB61-00076A JC66-00808A JC61-00836A FRAME-M_BASE Description ELA UNIT-FRAME_LOWER MEA UNIT-PAPER PATH MEA UNIT-KNOCK_UP ELA UNIT-RX DRIVE ADJUST-CASSETTE_L ADJUST-CASSETTE_R GEAR-PINION ACTUATOR-EMPTY GROUND-P-OPC SPRING ETC-TORSION DEVE_L SPRING ETC-TORSION DEVE_R SPRING-CS SPRING ETC-TORSION DOC (CC2-F) GEAR-FEED DR 41 FOOT-FRONT Location Service O1113 O1120 O1123 O1114 O1097 O1098 O1127 O1089 O1056 O1038 O1039 O1013 O1072 O1033 SA SNA SA SA SA SA SA SA SA SA SA SA SA SA SA SA Remark Service Manual Samsung Electronics 5-5 3 Fuser Unit 6 31 7 29 8 5 33 9 32 6 4 1 11 12 7 10 14 3 13 30 15 17 2 25 0 16 18 26 27 28 20 19 34 5-6 Service Manual Samsung Electronics 21 22 23 24 .Exploded Views & Parts List 5. 3-15 5.3-3 5.3-0 5.3-22 5.3-2 5.3-5 5.3-18 5.3-31 5.3-6 5.3-26 5.3-8 5.3-1 5.3-7 5.3-27 5.3-19 5.3-32 5.Code JC96-04061A JC96-04062A JC61-01720A JC63-01126A JC61-01719A JC66-00810A JC61-01172A 6107-001169 JC66-10901A JC61-00595A JC66-00600A JC66-01256A JC66-01254A JC61-00888A JC61-00887A 4713-001211 4713-001212 JC66-00824A JC66-00934A 6107-001163 1404-001373 4712-001032 JC39-00404A JC39-00403A JC61-00064A JC61-01721A JC66-00801A 6031-001051 JC63-01128A JC63-01130A JC63-01129A 6107-001167 JC66-01255A JC67-00085A ELA HOU-FUSER ELA HOU-FUSER FRAME-P_FUSER COVER-FUSER HOLDER-M-EXIT R GEAR-EXIT_DRV17 Description Location Service O1115 O1115 O1050 O1073 Z4415 O1091 O1067 O1088 O1086 O1035 O1034 O1012 O1012 O1011 O1021 O1020 O1032 O1087 SA SA SNA SNA SA SA SNA SA SA SNA SA SA SA SA SA SA SA SNA SNA SA SA SA SA SA SA SNA SNA SNA SNA SNA SNA SA SA SNA Remark 110V 220V HOLDER-M-EXIT F/DOWN SPRING-CS BEARING-PRESSURE/R GUIDE-M-INPUT ROLLER-PRESSURE ROLLER-HEAT GEAR-FUSER BUSH-M-HR L_R2 BUSH-M-HR R_R2 LAMP-HALOGEN LAMP-HALOGEN ROLLER-M-EXIT MAIN ROLLER-M_EXIT FR SPRING-CS THERMISTOR-NTC ASSY THERMOSTAT CBF HARNESS-FUSER JOINT CBF HARNESS-FUSER(110V) SPRING ETC-CLAW GUIDE-CLAW GEAR-EXIT_DR38/25 WASHER-PLAIN COVER-FUSER-DUMMY COVER-LAMP_L COVER-LAMP_R SPRING-CS ROLLER-EXIT F/DOWN CAP-M-THERMO 110V 220V 220V AC 110V Service Manual Samsung Electronics 5-7 .3-20 5.3-12 5.3-11 5.3-30 5.3-25 5.3-13 5.3-21 5.3-10 5.3-34 SEC.3-14 5.3-4 5. SNA : SERVICE not AVAILABLE Drawer# 5.3-33 5.3-0 5.3-16 5.3-29 5.3-9 5.Exploded Views & Parts List Fuser Unit Parts List SA : SERVICE AVAILABLE.3-23 5.3-14 5. Exploded Views & Parts List 5.4 Paper Path Unit 0 16 14 17 15 12 5 25 11-3 11-2 11-1 11 6 3 2 16 4 13 1 9-2 9-1 18 9 24 21 19 9-3 7 22 8 20 23 26 24 5-8 Service Manual Samsung Electronics . 4-25 SEC.4-2 5.4-9 5.4-19 5.4-3 5.4-23 5.4-24 5.4-12 5.4-1 5.4-0 5.4-17 5.4-13 5.4-7 5.Code JC97-02664A JC61-01710A JC66-01250A JB61-00107A JC70-10232A JC63-00625A JC63-00623A JC63-01125A JC97-02669A JC61-70911A JC69-00987A JC61-01711A JC97-02665A JC33-00015B JC66-01247A JC72-00102A JC61-70940A JC66-01218A JC70-00307A JC66-00829A JC61-01716A JC61-01717A JC73-00239A JC66-01258A JC66-00813A Description MEA UNIT-PAPER PATH GUIDE-PAPER PATH ACTUATOR-FEED SENSOR SPRING ETC-LEVER SENSOR IPR-PLATE SAW GROUND-P-VARISTOR GROUND-P-THV GROUND-P_SAW MEA UNIT-HOLDER_PAD SPRING ETC-EXIT ROLL FD PAD-FRICTION HOLDER-PAD MEA UNIT-PICK UP GEAR SOLENOID-MP_R2 GEAR-FEED PMO-BUSHING_TR(L) SPRING ETC-TR(12) ROLLER-TRANSFER IPR-P-EARTH TRANSFER SHAFT-P-PICK_UP HOUSING-PICK UP A HOUSING-PICK UP B RUBBER-PICK_UP CAM-PICK_UP GEAR-TRANSFER Location Service O1120 O1042 O1082 O1014 O1099 O1122 O1053 O1093 O1043 O1121 O1017 O1081 O1101 O1054 O1076 O1094 O1075 O1047 O1048 O1108 O1090 O1074 SA SA SA SA SA SNA SNA SNA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA SA Remark Service Manual Samsung Electronics 5-9 .4-21 5.Exploded Views & Parts List Paper path Unit Parts List SA : SERVICE AVAILABLE.4-20 5.4-8 5.4-9-2 5.4-15 5.4-5 5.4-9-3 5.4-4 5.4-11 5.4-22 5. SNA : SERVICE not AVAILABLE Drawer# 5.4-16 5.4-9-1 5. Exploded Views & Parts List 5.5 RX_Drive 5 7 8 11 9 10 0 4 3 5-10 Service Manual Samsung Electronics 6 2 . 5-6 5.Code JC96-04033A 6003-000269 6031-000023 JC31-00068A JC61-01708A JC61-01727A JC72-00825A JC66-00804A JC66-00805A JC66-01244A JC66-00806A JC60-00023A SCREW-TAPTITE WASHER-PLAIN MOTOR STEP Description ELA UNIT-RX DRIVE Location Service O1114 O1016 O1103 O1069 O1070 O1078 O1071 O1028 SA SA SNA SA SNA SNA SA SA SA SA SA SA Remark BRACKET-P_MOTOR BRACKET-P_GEAR PMO-IMPELLER_DRV GEAR-RDCN 139/83 GEAR-RDCN 113/83 GEAR-FUSER DRIVER GEAR-OPC DR 76/38/29 SPACER-GEAR Service Manual Samsung Electronics 5-11 .5-8 5.5-0 5.5-5 5.5-7 5.5-11 SEC.5-1 5.Exploded Views & Parts List Paper path Unit Parts List SA : SERVICE AVAILABLE. SNA : SERVICE not AVAILABLE Drawer# 5.5-3 5.5-4 5.5-10 5.5-9 5.5-2 5. • DVM(Digital Volt Meter) Standard : Indicates more than 3 digits. 7. the abbreviation table.1 Troubleshooting Tool The following tools are recommended safe and easy troubleshooting as described in this service manual. • Cleaning Equipments Standard : An IPA(Isopropyl Alcohol)dry wipe tissue or a gentle neutral detergent and lint-free cloth. and so on. for medical service. M2 short). • Driver Standard : "-" type. • Cotton Swab Standard : For general home use. • Software (Driver) installation CD ROM Service Manual Samsung Electronics 7-1 . "+" type (M3 long. and it is consist-ed of the tool list. the outline of model. M2 long. M3 short.Reference Information 7 7. • Vacuum Cleaner • Spring Hook Standard : For general use • Tweezers Standard : For general home use. Reference Information This chapter describes the reference information for applying this training manual. small type. Reference Information 7. Where abbreviations or acronyms are used in the text please refer to this table. Abbreviations AP AC APC ASIC ASSY BIOS BLDC CMOS CN CON CPU dB dbA dBM DC DCU DPI DRAM DVM ECP EDC EEPROM EMI EP EPP FPOT F/W GDI GND HBP HDD H/H HV HVPS I/F I/O IC IDE Access Point Alternating Current Auto Power Control Application Specific Integrated Circuit assembly Basic Input Output System Brush-less Direct Current Complementary Metal Oxide Semiconductor connector connector Central Processing Unit decibel decibel A decibel milliwatt direct current Diagnostic Control Unit Dot Per Inch Dynamic Random Access Memory Digital Voltmeter Enhanced Capability Port Embedded Diagnostic control Electronically Erasable Programmable Read Only Memory Electro Magnetic Interference electrophotographic Enhanced Parallel Port First Printout Time firmware graphics device interface ground Host Based Printing Hard Disk Drive High temperature and high marshy place high voltage High Voltage Power Supply interface Input and Output integrated circuit Intelligent Drive electronics or Imbedded Drive Electronics Explanation 7-2 Service Manual Samsung Electronics .2 Acronyms and Abbreviations(1) The table below explains the abbreviations and acronyms used in this service manual. Inc Isopropy Alcohol Images Per Minute local area network pound(s) Laser Beam Printer Liquid Crystal Display Light Emitting Diode Low temperature and low marshy place Laser Scanning Unit megabyte megahertz Multi Purpose Feeder Network Interface Card Normal temperature and normal marshy place nonvolatile random access memory Organic Photo Conductor Operate Panel Equipment Printed Board Assembly Printer Command Language .Reference Information Acronyms and Abbreviations(2) Abbreviations IEEE IPA IPM LAN lb LBP LCD LED L/L LSU MB MHz MPF NIC N/N NVRAM OPC OPE PBA PCL PDL PPM PPS PS PTL PWM Q-PID Q ty RAM ROM SCF SMPS SPGP SPL Spool SW sync USB WECA Explanation Institute of Electrical and Electronics Engineers. Printer Control Language Page Discription Language Page Per Minute Pulse Per Second Post Script Pre-Transfer Lamp Pulse Width Modulation Quick Printer Initiating Device quantity Random Access Memory Read Only Memory Second Cassette Feeder Switching Mode Power Supply Samsung Printer Graphic Processor Samsung Printer Language Simultaneous Peripheral Operation Online switch synchronous or synchronization Universal Serial Bus Wireless Ethernet Compatibility Alliance Service Manual Samsung Electronics 7-3 . and allow for proper ventilation.3 Selecting printer locations • Leave enough room to open the printer trays.Away from the direct airflow of air conditioners. dry.Free of extreme fluctuations of temperature. and free of dust 7-4 Service Manual Samsung Electronics . or humidity . (see diagram below) • Provide the proper environment : . heaters. level surface .A firm.Reference Information 7. or ventilators .Clean. covers. sunlight. The life of the toner cartridge.Reference Information 7. A4 ISO 19752 Standard Patterns Service Manual Samsung Electronics 7-5 . The A4 ISO 19752 standard pattern samples are reproduced reduced to 70% of the actual A4 size.4 Sample Tests Patterns The sample patterns shown below are the standard test patterns used in the factory. developer cartridge and printing speed are measured with the pattern shown below (5%).