Internal Use OnlyWebsite http://biz.lgservice.com SERVICE MANUAL MODEL: CM7520 (CM7520, CMS7520F/W) Mini Hi-Fi System SERVICE MANUAL MODEL: CM7520 (CM7520, CMS7520F/W) CAUTION BEFORE SERVICING THE UNIT, READ THE “SAFETY PRECAUTIONS” IN THIS MANUAL. P/NO : AFN75814417 JUNE , 2012 CONTENTS SECTION SECTION SECTION SECTION 1 ........ GENERAL 2 ........ CABINET & MAIN CHASSIS 3 ........ ELECTRICAL 4 ........ REPLACEMENT PARTS LIST 1-1 SECTION 1 SUMMARY CONTENTS SERVICING PRECAUTIONS ................................................................................................................... 1-3 ESD PRECAUTIONS .................................................................................................................................. 1-5 HIDDEN KEY MODE................................................................................................................................... 1-6 SERVICE INFORMATION FOR EEPROM .......................................................................................... 1-7 PROGRAM DOWNLOAD GUIDE ........................................................................................................... 1-8 1. AUDIO PROGRAM ................................................................................................................................... 1-8 2. CD PROGRAM ......................................................................................................................................... 1-9 3. EQ PROGRAM ....................................................................................................................................... 1-10 SPECIFICATIONS ..................................................................................................................................... 1-11 1-2 SERVICING PRECAUTIONS NOTES REGARDING HANDLING OF THE PICK-UP 1. Notes for transport and storage 1) The pick-up should always be left in its conductive bag until immediately prior to use. 2) The pick-up should never be subjected to external pressure or impact. Storage in conductive bag Drop impact 2. Repair notes 1) The pick-up incorporates a strong magnet, and so should never be brought close to magnetic materials. 2) The pick-up should always be handled correctly and carefully, taking care to avoid external pressure and impact. If it is subjected to strong pressure or impact, the result may be an operational malfunction and/or damage to the printed-circuit board. 3) Each and every pick-up is already individually adjusted to a high degree of precision, and for that reason the adjustment point and installation screws should absolutely never be touched. 4) Laser beams may damage the eyes! Absolutely never permit laser beams to enter the eyes! Also NEVER switch ON the power to the laser output part (lens, etc.) of the pick-up if it is damaged. NEVER look directly at the laser beam, and don’t allow contact with fingers or other exposed skin. 5) Cleaning the lens surface If there is dust on the lens surface, the dust should be cleaned away by using an air bush (such as used for camera lens). The lens is held by a delicate spring. When cleaning the lens surface, therefore, a cotton swab should be used, taking care not to distort lens. Pressure Magnet Pressure How to hold the pick-up Cotton swab Conductive Sheet 6) Never attempt to disassemble the pick-up. Spring has excess pressure. If the lens is extremely dirty, apply isopropyl alcohol to the cotton swab. (Do not use any other liquid cleaners, because they will damage the lens.) Take care not to use too much of this alcohol on the swab, and do not allow the alcohol to get inside the pick-up. 1-3 NOTES REGARDING COMPACT DISC PLAYER REPAIRS 1. Preparations 1) Compact disc players incorporate a great many ICs as well as the pick-up (laser diode). These components are sensitive to, and easily affected by, static electricity. If such static electricity is high voltage, components can be damaged, and for that reason components should be handled with care. 2) The pick-up is composed of many optical components and other high-precision components. Care must be taken, therefore, to avoid repair or storage where the temperature or humidity is high, where strong magnetism is present, or where there is excessive dust. 2. Notes for repair 1) Before replacing a component part, first disconnect the power supply lead wire from the unit 2) All equipment, measuring instruments and tools must be grounded. 3) The workbench should be covered with a conductive sheet and grounded. When removing the laser pick-up from its conductive bag, do not place the pick-up on the bag. (This is because there is the possibility of damage by static electricity.) 4) To prevent AC leakage, the metal part of the soldering iron should be grounded. 5) Workers should be grounded by an armband (1 MΩ) 6) Care should be taken not to permit the laser pick-up to come in contact with clothing, in order to prevent static electricity changes in the clothing to escape from the armband. 7) The laser beam from the pick-up should NEVER be directly facing the eyes or bare skin. Armband Resistor (1 MΩ) Resistor (1 MΩ) Conductive Sheet 1-4 ESD PRECAUTIONS Electrostatically Sensitive Devices (ESD) Some semiconductor (solid state) devices can be damaged easily by static electricity. Such components commonly are called Electrostatically Sensitive Devices (ESD). Examples of typical ESD devices are integrated circuits and some field-effect transistors and semiconductor chip components. The following techniques should be used to help reduce the incidence of component damage caused by static electricity. 1. Immediately before handling any semiconductor component or semiconductor-equipped assembly, drain off any electrostatic charge on your body by touching a known earth ground. Alternatively, obtain and wear a commercially available discharging wrist strap device, which should be removed for potential shock reasons prior to applying power to the unit under test. 2. After removing an electrical assembly equipped with ESD devices, place the assembly on a conductive surface such as aluminum foil, to prevent electrostatic charge buildup or exposure of the assembly. 3. Use only a grounded-tip soldering iron to solder or unsolder ESD devices. 4. Use only an anti-static solder removal device. Some solder removal devices not classified as "anti-static" can generate electrical charges sufficient to damage ESD devices. 5. Do not use freon-propelled chemicals. These can generate electrical charges sufficient to damage ESD devices. 6. Do not remove a replacement ESD device from its protective package until immediately before you are ready to install it. (Most replacement ESD devices are packaged with leads electrically shorted together by conductive foam, aluminum foil or comparable conductive materials). 7. Immediately before removing the protective material from the leads of a replacement ESD device, touch the protective material to the chassis or circuit assembly into which the device will by installed. CAUTION : BE SURE NO POWER IS APPLIED TO THE CHASSIS OR CIRCUIT, AND OBSERVE ALL OTHER SAFETY PRECAUTIONS. 8. Minimize bodily motions when handing unpackaged replacement ESD devices. (Otherwise harmless motion such as the brushing together of your clothes fabric or the lifting of your foot from a carpeted floor can generate static electricity sufficient to damage an ESD device). CAUTION. GRAPHIC SYMBOLS THE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHIN AN EQUILATERAL TRIANGLE, IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED “DANGEROUS VOLTAGE” THAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK. THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE. 1-5 HIDDEN KEY MODE Push both Front key and RCU key to activate it for 5 seconds. 1. Disc Lock On/Off (CD Function Only Active) Front Key : STOP RCU Key : STOP 2. Check Version and Option code Front Key : STOP RCU Key : PLAY/PAUSE You can change [Audio MCU Version <-> CD Controller Version <-> EEPROM Option] by SKIP+/-. 3. Clear EEPROM Front Key : STOP RCU Key : SKIP- 4. Edit EEPROM Front Key : STOP RCU Key : SKIP+ You can change the digit of option by SKIP+/-. You can edit 0~f by REPEAT or PLAY/PAUSE key. 5. Bluetooth DUT Front Key : STOP RCU Key : PROGRAM Bluetooth model only 6. Power Disc Lock On/Off (CD Function Only Active) Front Key : STOP RCU Key : EQ 7. Amp Clip On/Off Front Key : STOP RCU Key : Mute Amp Clip Mode Change (Amp Clip On --> Amp Clip Off --> Level Down display) 1-6 SERVICE INFORMATION FOR EEPROM POWER ON FLD no disc status Remote control ‘ ’ + Front ‘STOP’ push at a time for 5 seconds FLD ‘OP-0…. Move to appropriate position and make changes with remote control. ( , , /■ , REPEAT ) DETECT NEW EEPROM (OPTION EDIT SCREEN) NAME HEX OP0 OP1 OP2 OP3 OP4 OP5 OP6 OP7 OP8 OP9 05 00 00 00 00 09 80 06 00 00 Press STOP key FLD ‘write ok’ Remote control ‘ ’ + Front ‘STOP’ at a time FLD ‘E2P CLR’ Completed 1-7 PROGRAM DOWNLOAD GUIDE 1. AUDIO PROGRAM Download program file name must be CM7520_YYMMDDX.HEX If security program (Water Wall) is activated on your PC, you must save the file to the usb storage device and disable the security software, then download the file to your set. Caution: When downloading the file, you should neither unplug the usb device, change to the other function, nor power off the device. Usb device must be unplugged when the downloading process is completed. ON VFD DISPLAY SCREEN NO USB ↓ ← Insert usb device at usb function READ ↓ FIRMWARE ↓ WRITE 00 .. 100 ↓ UPDATED ↓ POWER OFF AUTOMATICALLY ← When completed, remove usb device. 1-8 2. CD PROGRAM Download program file name must be HE003_DATE_00.BIN If security program (Water Wall) is activated on your PC, you must save the file to the usb storage device and disable the security software, then download the file to your set. Caution: When downloading the file, you should neither unplug the usb device, change to the other function, nor power off the device. Usb device must be unplugged when the downloading process is completed. ON VFD DISPLAY SCREEN NO USB ↓ ← Insert usb device at usb function READ ↓ FIRMWARE ↓ FINISH ← When completed, remove usb device. ↓ POWER OFF / ON 1-9 3. EQ PROGRAM Download program file name must be EQ_PRG.BIN If security program (Water Wall) is activated on your PC, you must save the file to the usb storage device and disable the security software, then download the file to your set. Caution: When downloading the file, you should neither unplug the usb device, change to the other function, nor power off the device. Usb device must be unplugged when the downloading process is completed. ON VFD DISPLAY SCREEN NO USB ↓ ← Insert usb device at usb function READ ↓ EQ DOWNLOAD ↓ UPDATED ↓ POWER OFF AUTOMATICALLY ← When completed, remove usb device. 1-10 SPECIFICATIONS • GENERAL Power requirements Power consumption Dimensions (W x H x D) Net Weight (Approx.) Operating temperature Operating humidity Bus Power Supply Refer to main label Refer to main label 285 x 349 x 370 5.6 kg 5 °C to 35 °C (41 °F to 95 °F) 5 % to 90 % USB DC 5 V 500 mA • INPUTS AUX IN PORT. IN 2.0 Vrms (1 kHz, 0 dB), 600 Ω, RCA jack (L, R) x 1 1.2 Vrms (3.5 mm stereo jack) • TUNER FM Tuning Range AM Tuning Range 87.5 to 108.0 MHz or 87.50 to 108.00 MHz 522 to 1 620 kHz, 520 to 1 710 kHz or 522 to 1 710 kHz AMPLIFIER Stereo mode Surround mode Front Subwoofer 310 W + 310 W (4 Ω at 1 kHz, THD 10%) 310 W + 310 W (4 Ω at 1 kHz, THD 10 %) 310 W (4 Ω at 1 kHz, THD 10 %) • CD Frequency Response Signal-to-noise ratio Dynamic range 40 to 20 000 Hz 75 dB 80 dB • FRONT SPEAKER Type Impedance Rated Input Power Max. Input power Net Dimensions (W x H x D) Net Weight 2 Way 2 speaker 4Ω 310 W 620 W 264 x 475 x 330 mm 7.8 kg • SUBWOOFER Type Impedance Rated Input Power Max. Input power Net Dimensions (W x H x D) Net Weight 1 Way 1 speaker 4Ω 310 W 620 W 346 x 452 x 330 mm 9.6 kg • Design and specifications are subject to change without notice. 1-11 MEMO 1-12 SECTION 2 CABINET & MAIN CHASSIS CONTENTS EXPLODED VIEWS..................................................................................................................................... 2-3 1. 2. 3. 4. CABINET AND MAIN FRAME SECTION (CM7520) ................................................................................ 2-3 MECHANISM DECK SECTION (DP-12A) ................................................................................................ 2-5 PACKING ACCESSORY SECTION ......................................................................................................... 2-7 SPEAKER SECTION ................................................................................................................................ 2-8 2-1 MEMO 2-2 EXPLODED VIEWS NOTES) THE EXCLAMATION POINT WITHIN AN EQUILATERAL TRIANGLE IS INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE LITERATURE. 1. CABINET AND MAIN FRAME SECTION (CM7520) 464 268 464 464 270 464 CABLE6 K VFD H 269 CABLE4 464 A43 464 464 E 464 A54 J MIC CABLE5 G C 464 D 462 CABLE7 464 I 464 VOLUME 277 464 F SMPS A47 A 464 B 267 276 A42 275 462 464 265 A44 464 I 464 462 252 300 K C J 464 266 D G MAIN 464 251 464 271 274 254 272 A46 H F E 464 B A MEMO 2. MECHANISM DECK SECTION (DP-12A) 001 002 A02 A01 003 439 018 013 014 020 017 435 015B 016 015 015A 440 026 010 442 012A 012 A03 037 019 012 442 3. PACKING ACCESSORY SECTION 801 Owner’s Manual AAA 900 Remote Control AA A 808 Battery 824 AM Loop Antenna 825 FM Wire Antenna 803 Packing 804 Bag 803 Packing 802 Box 4. SPEAKER SECTION 4-1. FRONT SPEAKER (CMS7520F) A60 4-2. PASSIVE SUBWOOFER (CMS7520W) A90 MEMO 2-10 SECTION 3 ELECTRICAL CONTENTS TRAINING MASTER ................................................................................................................................... 3-2 1. 2. 3. 4. 5. 6. 7. NO NO NO NO NO NO NO SOUND FROM SPEAKERS ............................................................................................................ 3-2 SOUND IN AUX FUNCTION............................................................................................................ 3-3 SOUND IN PORT. IN FUNCTION ................................................................................................... 3-4 SOUND IN AM/FM FUNCTION ....................................................................................................... 3-5 SOUND IN CD FUNCTION .............................................................................................................. 3-6 SOUND IN USB FUNCTION............................................................................................................ 3-8 POWER ............................................................................................................................................ 3-9 ONE POINT REPAIR GUIDE................................................................................................................. 3-10 1. 2. 3. 4. 5. 6. NO POWER .......................................................................................................................................... 3-10 NO BOOTING WHEN POWER ON THE SET ..................................................................................... 3-12 VFD IS NOT DISPLAYED WHEN POWER ON THE SET................................................................... 3-13 NO BOOTING IN CD/USB FUNCTION ................................................................................................ 3-14 NO OPERATION OF MD ..................................................................................................................... 3-19 NO SOUND .......................................................................................................................................... 3-24 ELECTRICAL TROUBLESHOOTING GUIDE.................................................................................. 3-32 1. 2. 3. 4. POWER SUPPLY ON SMPS BOARD ................................................................................................. 3-32 SYSTEM PART .................................................................................................................................... 3-36 NO AUDIO PART ................................................................................................................................. 3-37 DIGITAL AUDIO AMP CHECK ............................................................................................................. 3-41 WAVEFORMS............................................................................................................................................. 3-42 WIRING DIAGRAM ................................................................................................................................... 3-47 BLOCK DIAGRAMS ................................................................................................................................. 3-49 1. SMPS BLOCK DIAGRAM..................................................................................................................... 3-49 2. MAIN SYSTEM BLOCK DIAGRAM ...................................................................................................... 3-51 CIRCUIT DIAGRAMS ............................................................................................................................... 3-53 1. SMPS CIRCUIT DIAGRAM .................................................................................................................. 3-53 2. MAIN - MICOM CIRCUIT DIAGRAM.................................................................................................... 3-55 3. MAIN - PWM / FILTER CIRCUIT DIAGRAM........................................................................................ 3-57 4. MAIN - IR AMP CIRCUIT DIAGRAM ................................................................................................... 3-59 5. MAIN - DSP / USB / IPOD CIRCUIT DIAGRAM .................................................................................. 3-61 6. MAIN - RF SERVO CIRCUIT DIAGRAM ............................................................................................. 3-63 7. MAIN - ADC CIRCUIT DIAGRAM ........................................................................................................ 3-65 8. MAIN - BEAT BOX CIRCUIT DIAGRAM .............................................................................................. 3-67 9. FRONT - VFD CIRCUIT DIAGRAM ..................................................................................................... 3-69 10. FRONT - VOLUME CIRCUIT DIAGRAM ............................................................................................. 3-71 11. FRONT - MIC & PORTABLE CIRCUIT DIAGRAM .............................................................................. 3-73 CIRCUIT VOLTAGE CHART ................................................................................................................. 3-75 PRINTED CIRCUIT BOARD DIAGRAMS ......................................................................................... 3-79 1. 2. 3. 4. 5. SMPS P.C.BOARD ............................................................................................................................... 3-79 MAIN P.C.BOARD ................................................................................................................................ 3-83 FRONT_VFD P.C.BOARD ................................................................................................................... 3-87 FRONT_MIC & PORTABLE P.C.BOARD ............................................................................................ 3-89 FRONT_VOLUME P.C.BOARD ........................................................................................................... 3-91 3-1 TRAINING MASTER 1. NO SOUND FROM SPEAKERS Are the speaker cables connected correctly between the speaker terminals on the unit and the speakers? NO Make sure to connect the cables to each specified connector tightly on the unit. Connect the woofer cables to the WOOF SYSTEM connectors on the rear panel. YES Does the customer select correctly the input function he or she wants to listen to? NO Make sure to connect some cables like A/V cables and FM/AM antenna cables. NO Make sure to select the desired input function pressing FUCTION button. NO The volume level LEDs around the master volume will be turned on more and more while turning it clockwise for the volume up. NO Refer to a device’s instruction manual and then check if there is sound output from it connecting another audio system. YES After pressing FUNCTION, is “CD, USB, AUX, IPOD, AM or FM” displayed? YES Turn the master volume clockwise for the volume up. YES Is there any sound from the selected input source? (AUX IN, USB, TUNER or CD Disc) YES Are the sound spectrum level LEDs on the left and right side of the front panel being changed up and down according to the sound input gain? NO YES The sound is output from the speakers. YES Sound OK 3-2 The sound spectrum level LEDs will be turned on/off repeatedly at regular intervals. The speakers cables might be short-circuited with the chassis ground. Be careful not to be shorted each other. TRAINING MASTER 2. NO SOUND IN AUX FUNCTION Does the customer select correctly the AUX function he or her wants to listen to? NO Make sure to connect some cables between the AUX IN jacks of the unit and the Audio output jacks of a external Audio device. NO Make sure to select the AUX IN function pressing the AUX/IPOD/PORT. IN button. NO The volume level LEDs around the master volume will be turned on more and more while turning it clockwise for the volume up. NO Refer to a device’s instruction manual and then check if there is sound output from it connecting another audio system YES After pressing the FUNCTION, is “AUX” displayed on VFD? YES Turn the master volume clockwise for the volume up. YES Is there any sound from the selected input source? YES Are the sound spectrum level LED’s on the left and right side of the front panel being changed up and down according to the sound input gain? NO The sound spectrum level LED’s will be turned on/off repeatedly at regular intervals. A speaker cable might be short-circuited with the chassis ground. Be careful not to be shorted each other. YES Are the speaker cables connected correctly between the speaker terminals on the unit and the speakers? NO YES The sound is output from the speakers. YES Sound OK 3-3 Make sure to connect the cables to each specified connector tightly on the unit. Connect the woofer cables to the WOOF SYSTEM connectors on the rear panel. TRAINING MASTER 3. NO SOUND IN PORT. IN FUNCTION Does the customer select correctly the PORT. IN function he or her wants to listen to? NO Make sure to connect a cable between the PORT. IN jack of the unit and the Audio output jack of a portable device like a MP3 player. NO Make sure to select the PORT. IN function pressing the AUX/IPOD/PORT. IN button. NO The volume level LEDs around the master volume will be turned on more and more while turning it clockwise for the volume up. NO Refer to a portable device’s instruction manual and then check if there is sound output from it connecting another audio system. YES Is “PORT. IN” displayed on VFD? YES Turn the master volume clockwise for the volume up. YES Is there any sound from the selected input source? YES Are the sound spectrum level LED’s on the left and right side of the front panel being changed up and down according to the sound input gain? NO The sound spectrum level LED’s will be turned on/off repeatedly at regular intervals. A speaker cable might be short-circuited with the chassis ground. Be careful not to be shorted each other. YES Are the speaker cables connected correctly between the speaker terminals on the unit and the speakers? NO YES The sound is output from the speakers. YES Sound OK 3-4 Make sure to connect the cables to each specified connector tightly on the unit. Connect the woofer cables to the WOOF SYSTEM connectors on the rear panel. TRAINING MASTER 4. NO SOUND IN AM/FM FUNCTION Does the customer select correctly the AM/FM function he or she wants to listen to? NO Make sure to connect AM/FM antennas on the rear panel of the unit. NO Make sure to select AM or FM function pressing the TUNER button. YES Is “AM or FM” displayed on VFD? YES After tuning a desired channel using the TUNING± button, is the sound quality good to listen to the music? NO To prevent noise pickup, keep the AM Loop antenna away from the unit and other components. Be sure to fully extend the FM wire antenna. After connecting the FM wire antenna, keep it horizontal. YES Is the signal strength of the radio station too week? NO Make sure to tune the station manually. YES Are the sound spectrum level LED’s on the left and right side of the front panel being changed up and down according to the sound input gain? NO The sound spectrum level LED’s will be turned on/off repeatedly at regular intervals. A speaker cable might be short-circuited with the chassis ground. Be careful not to be shorted each other. YES Are the speaker cables connected correctly between the speaker terminals on the unit and the speakers? NO YES The sound is output from the speakers. YES Sound OK 3-5 Make sure to connect the cables to each specified connector tightly on the unit. Connect the woofer cables to the WOOF SYSTEM connectors on the rear panel. TRAINING MASTER 5. NO SOUND IN CD FUNCTION Does the customer select correctly the CD function he or she wants to listen to? NO Make sure to put on a CD disc on the tray. YES Is a CD disc put on the tray correctly? NO Make sure to insert the CD disc upside down. YES Does the unit display “NO DISC” on VFD when a disc is inserted on the tray? NO Place the disc with the label or printed side facing upwards. NO Check the playable disc. Make sure that the file extensions are “.mp3” or “.wma”. NO Make sure to check the supported MP3/WMA music file on the CD disc. Refer to the owner’s manual. NO The volume level LEDs around the master volume will be turned on more and more while turning it clockwise for the volume up. YES Does the customer use the supported mp3 or WMA music files on the disc? YES When the unit searches music files in a CD disc, are the following messages displayed on VFD? “SELECTED” “TRACKING #” and “TIME” YES After selecting a track number using the SCAN or DISC# button, press PLAY button and turn the master volume clockwise for the volume up. YES Is the sound quality good to listen to the music? NO Make sure to clean CD discs with a commercially available cleaner. If the surface of the disc is polluted or scratched, the sound quality can become bad or the customer can not listen to the music. YES Are the sound spectrum level LED’s on the left and right side of the front panel changed up and down according to the sound input gain? NO YES 3-6 The sound spectrum level LED’s will be turned on/off repeatedly at regular intervals. A speaker cable might be short-circuited with the chassis ground. Be careful not to be shorted each other. TRAINING MASTER YES Are the speaker cables connected correctly between the speaker terminals on the unit and the speakers? NO Maker sure to connect the cables to each specified connector tightly on the unit. Connect the woofer cables to the WOOF SYSTEM connectors on the rear panel. YES The sound is output from the speakers. NO 3-7 Sound OK TRAINING MASTER 6. NO SOUND IN USB FUNCTION Does the customer select correctly the USB function he or she wants to listen to? NO Make sure to insert a USB into the USB ports. YES Is “USB” displayed on VFD? NO Make sure to select the USB function pressing the CD/USB button. NO When “No USB” is displayed, make sure that the customer uses the recommended USB which support USB2.0 or USB1.1. NO Check if it is the playable disc or not. Make sure that the file extensions are “.mp3”or “.wma”. NO Make sure to check the compatible USB device and the supported MP3/WMA music file requirement. Refer to the owner’s manual. NO The volume level LEDs around the master volume will be turned on more and more while turning it clockwise for the volume up. YES Does the unit display “SELECTED” on VFD when a USB is inserted into the USB port? YES Does the customer use the supported mp3 or WMA music files on the disc? YES When the unit searches music files in a USB, are the following messages displayed on VFD? “SELECTED” “TRACKING #” and “TIME”. YES After selecting a track number using the SCAN button, press PLAY button and turn the master volume clockwise for the volume up. YES Are the sound spectrum level on the left and right side of the front panel being changed up and down according to the sound input gain? NO The sound spectrum level will be turned on/off repeatedly at regular intervals. A speaker cable might be short-circuited with the chassis ground. Be careful not to be shorted each other. YES Are the speaker cables connected correctly between the speaker terminals on the unit and the speakers? NO YES 3-8 Make sure to connect the cables to each specified connector tightly on the unit. Connect the woofer cables to the WOOF SYSTEM connectors on the rear panel. TRAINING MASTER YES The sound is output from the speakers. NO Sound OK 7. NO POWER Is the power cord plugged into a electrical outlet? NO Make sure to plug the power cord of the unit into a electrical outlet. YES Does the Standby LED light in red color? NO If the customer can not see the red light on the front panel, the SMPS might have any problem. Please solve the problem referring to the service manual. YES Is the Standby LED turned off after pressing the Power button on the remote control? NO Replace the batteries with new ones if the remote control doesn’t work. NO The SMPS might be not able to supply the power to drive the VFD. Refer to the service manual to fix it. YES Are the messages displayed in the following order on VFD? “HELLO” “VOLUME 15” “FUNCTION” YES Is there any sound from the speakers each input function? NO YES Power & Sound OK 3-9 Make sure to connect speaker cables. ONE POINT REPAIR GUIDE 1. NO POWER If the unit doesn’t work by no power problem, repair the set according to the following guide. 1-1. FUSE & BRIDGE DIODE 1-1-1. Solution Please check and replace F901, BD901, TH901, TH902 on SMPS board. 1-1-2. How to troubleshoot (Countermeasure) 1) Check if the fuse F901 is open or short-circuit. 2) Check if the bridge diode BD901 is short-circuit by over current with a digital multi meter. 3) Check if the NTC thermistor TH901 and TH902 is normal or open. 1-1-3. Service hint (Any picture / Remark) < F901 > If F901 is not short-circuit, replace it with a same specifications one. < BD901 > If BD901 is short-circuit, replace it with a new one. 3-10 < TH901, TH902 > If TH901 or TH902 is open, replace it with a new one. ONE POINT REPAIR GUIDE NO POWER If the unit doesn’t work by no power problem, repair the set according to the following guide. 1-2. D951 / D952, ZD951 1-2-1. Solution Please check and replace D951 / D952, ZD951 on SMPS board. 1-2-2. How to troubleshoot (Countermeasure) 1) Check the Anode-Cathod Voltage of D951 / D952 with a digital multi-meter, it is normally 0.2 ~ 0.3 V. If it doesn’t have any voltage, it’s destroyed. Replace it with a new one. 2) Check if ZD951 is short-circuit. If it is short-circuit, and then replace it with a new one. 1-2-3. Service hint (Any picture / Remark) < SMPS schematic diagram > 3-11 ONE POINT REPAIR GUIDE 2. NO BOOTING WHEN POWER ON THE SET The set doesn’t work when press the power button on the front board or the remote control. 2-1. FLASH MEMORY (IC101) 2-1-1. Solution Please check and replace IC101 on MAIN board. 2-1-2. How to troubleshoot (Countermeasure) 1) Check the 3.7 VA to CN102, CN103, and CN104 in standby mode. If there is no 3.7 VA, check the SMPS. 2) Check 5.6 VA, 12 VA, FL+, FL- and 32 V when power on the set. - If the set doesn’t work regardless of what the KEY1 changes high to low while pressing the power button. X100 and X101 work normally but, if you can not power on the set, replace the IC101 with a new one on the main board. 2-1-3. Service hint (Any picture / Remark) w~ yj{ys OyX[`P rl X OX\P XWW O`UZ_ZWto¡P XWX OZYU^]_ro¡P < Signal check point > 3-12 ONE POINT REPAIR GUIDE 3. VFD IS NOT DISPLAYED WHEN POWER ON THE SET When power on the set, any icons or characters on VFD are not displayed. 3-1. VFD 3-1-1. Solution Please check and replace DIG301 on FRONT board. 3-1-2. How to troubleshoot (Countermeasure) 1) 2) 3) 4) Check if VKK(-32 V), FL+ and FL- are output from SMPS to VFD via the main board. Check if 3.3 VA enters IC301. Check if the IC101 outputs VFD_RST, VFD_CLK, VFD_STB, and VFD_STB to the front board. Check if pin P1~15G of DIG301. If there is no signal, replace IC301 with a new one. If there is no problem, replace VFD with a new one. 3-1-3. Service hint (Any picture / Remark) VFD_CLK 3.3 VA VFD_RST VFD_STB IC301 < Fronnt - VFD board bottom view > 3-13 ONE POINT REPAIR GUIDE 4. NO BOOTING IN CD/USB FUNCTION After you turn on power key and displayed message in the following order (HELLO --> VOL XX --> CD or USB) on VFD, it will not display other message on VFD, and it will not boot-up normally. 4-1. NO VCC33, VCC12 4-1-1. Solution Please check and replace IC505, IC509 on MAIN board. 4-1-2. How to troubleshoot (Countermeasure) 1) Check Voltage of IC505 pin2 on MAIN board. If IC505 pin2(about 4.9 V) & D501 Input 5.6 VA doesn’t come out, check 5.6 VA from SMPS board. 2) If IC505 pin2(about 4.9 V) is normal, check the PWR_CTRL(IC505 pin1) is high (about 3.3 V). If PWR_CTRL isn’t high, check pin63 of IC101 & R149,R503. 3) If PWR_CTRL is high, check R592, R593 and if there’s no defective component then replace IC505. 4) If 3.3 V(VCC33) is normal, check output(pin2, 4) voltage of IC509. If 1.2 V of IC509 pin2,4 doesn’t come out, then replace IC509. 4-1-3. Service hint (Any picture / Remark) IC509 IC505 IC501 D501 < MAIN board top view > < MAIN board bottom view > 3-14 ONE POINT REPAIR GUIDE NO BOOTING IN CD/USB FUNCTION After you turn on power key and displayed message in the following order (HELLO --> VOL XX --> CD or USB) on VFD, it will not display other message on VFD, and it will not boot-up normally. 4-2. CRYSTAL (X501) 4-2-1. Solution Please check and replace X501 on MAIN board. 4-2-2. How to troubleshoot (Countermeasure) 1) If 3.3 V & 1.2V is normal, check Reset ‘High’ of IC501 pin153 on MAIN board. If MAIN_RESET isn’t high, check MICOM(IC101) pin59. 2) If MAIN_RESET is high, check the soldering status of 12 MHz crystal (X501). 3) If the crystal(X501) doesn’t oscillate, check R541,R542,C517,C518 around crystal(X501). If there’s no defective component, then replace X501. 4-2-3. Service hint (Any picture / Remark) p R546 IC501 v X501 < Signal check point > < Signal waveform > 3-15 ONE POINT REPAIR GUIDE NO BOOTING IN CD/USB FUNCTION After you turn on power key and displayed message in the following order (HELLO --> VOL XX --> CD or USB) on VFD, it will not display other message on VFD, and it will not boot-up normally. 4-3. SERIAL FLASH (IC503) 4-3-1. Solution Please check and replace IC503 on MAIN board. 4-3-2. How to troubleshoot (Countermeasure) 1) If the crystal(X501) does oscillate, check serial flash(IC503) on MAIN board. Check pin8(VCC), pin6(CLK), pin1(CS#), pin2(DO), pin5(DI) of below waveform. 2) If pin1, 2, 5, 6, 8 doesn’t come out, check damping resistor(R511, R513, R514, R515) of IC503. If damping resistor of IC503 is OK, then replace IC503. (it need to download program) 3) After change IC503, if It is still not below waveform, check IC501(DSP IC). 4-3-3. Service hint (Any picture / Remark) VCC CS# CLK DO < Signal check point > < Signal waveform > 3-16 ONE POINT REPAIR GUIDE NO BOOTING IN CD/USB FUNCTION After you turn on power key and displayed message in the following order (HELLO --> VOL XX --> CD or USB) on VFD, it will not display other message on VFD, and it will not boot-up normally. 4-4. SDRAM (IC502) 4-4-1. Solution Please check and replace IC502 on MAIN board. 4-4-2. How to troubleshoot (Countermeasure) 1) Check below waveform & soldering status of SDRAM (IC502) on MAIN board. If pin17(#CAS), pin18(#RAS), pin19($CS), pin38(CLK), pin29(address), pin2(DQ) doesn’t come out, check damping resistor (R508,R506,R504,R507). 2) If resistor is OK, then replace IC502(SDRAM). 3) After change IC502, if It is still not below waveform, check IC501(DSP IC). 4-4-3. Service hint (Any picture / Remark) } jj y V jz y hz V~l jhz < Signal check point > < Signal waveform > 3-17 ONE POINT REPAIR GUIDE NO BOOTING IN CD/USB FUNCTION After you turn on power key and displayed message in the following order (HELLO --> VOL XX --> CD or USB) on VFD, it will not display other message on VFD, and it will not boot-up normally. 4-5. DSP IC (IC501: MLC3700) 4-5-1. Solution Please check and replace IC501 on MAIN board. 4-5-2. How to troubleshoot (Countermeasure) 1)After check them by previous pages about NO Booting, if the set is still no booting, Check soldering status of IC501. Check boot strap option(R598, R594, R597) of IC501(DSP IC). 2) If below bootstrap waveform doesn’t come out, then replace IC501(DSP IC). 4-5-3. Service hint (Any picture / Remark) y\`_ y\`[ y\`^ R594 PGPB12 (Yellow) R598 PAD19 (Green) IC501 R597 PAD20 (Pink) < Signal check point > < Bootstrap Waveform > 3-18 ONE POINT REPAIR GUIDE 5. NO OPERATION OF MD When no sound output in the CD function, you can not listen to music reading data from a CD disc if the servo motors in MD don’t work. This step is for checking the SPINDLE MOTOR among them. 5-1. SPINDLE MOTOR 5-1-1. Solution Please check and replace IC407, IC408 on MAIN board. 5-1-2. How to troubleshoot (Countermeasure) 1) Check the SPDO signal from Pin16 of IC407. If no signal, check 3.3V(RF) and X402. 2) Check the SP- & SP+ from IC408 to CN405 for driving SPinDLE motor. It is about 3.6 Vp-p. If no signal, check +1.8 V and +5 V for IC408. 3) Check if the FFC cable is solidly connected between CN405 and MD. 4) Check the MD. If the spindle motor is sort-circuit or has any trouble, it can not rotate CD discs. Please check the function after changing another MD. 5-1-3. Service hint (Any picture / Remark) zwR _GGju[W\ G ZU]} T zwT `GGju[W\ zwT Gju[W\ zwRGGju[W\ < Waveform of SP- & SP+ for driving SPINDLE motor > < Signal check point > 3-19 pj[W_ ONE POINT REPAIR GUIDE NO OPERATION OF MD When no sound output in the CD function, you can not listen to music reading data from a CD disc if the servo motors in MD don’t work. This step is for checking the SLED MOTOR among them. 5-2. SLED MOTOR 5-2-1. Solution Please check and replace IC407, IC408 on MAIN board. 5-2-2. How to troubleshoot (Countermeasure) 1) Check the SLDO signal from Pin15 of IC407. If no signal, check 3.3 V(RF) and X402. 2) Check the SLED+ & SLED- from IC408 to CN405 for driving SPINDLE motor. It is about 2.9 Vp-p. If no signal, check +1.8 V and +5 V for IC408. 3) Check if the FFC cable is solidly connected between CN405 and MD. 4) Check the MD. If the sled motor is sort-circuit or has any trouble, it can not move the pick-up module. Please check the function after changing another MD. 5-2-3. Service hint (Any picture / Remark) hG YU`} T zsR [GGju[W\ zsT Gju[W\ zwT Gju[W\ zsRGGju[W\ zwRGGju[W\ zsT ZGGju[W\ < Waveform of SLED- & SLED+ for driving SLED motor > < Signal check point > 3-20 pj[W_ ONE POINT REPAIR GUIDE NO OPERATION OF MD When no sound output in the CD function, you can not listen to music reading data from a CD disc if the servo motors in MD don’t work. This step is for checking the TRAY OPEN/CLOSE MOTOR among them. 5-3. TRAY OPEN / CLOSE MOTOR 5-3-1. Solution Please check and replace IC407, IC408 on MAIN board. 5-3-2. How to troubleshoot (Countermeasure) 1) Check MOT_OPEN & MOT_CLOSE signals from Pin62 & 63 of IC501 to IC408. If no signal, check +1.8 V & + 5 V to IC408. 2) Check LOAD± from IC406 to CN405 for driving the tray open / close motor. It is about 3.85 Vp-p. If no signal, check +5 V to IC406. If it has any trouble, replace it with a new one. 3) Check if the FFC cable is solidly connected between CN405 and MD. 4) Check the MD. If the tray motor is sort-circuit or has any trouble, it can not open or close the tray. Please check the function after changing another MD. 5-3-3. Service hint (Any picture / Remark) tv{vwlu hG ZU_\} T ^GGpj[W_ tv{jsvzl ]GGpj[W_ tv{vwlu tv{jsvzl svT Gju[W[ svRGGju[W[ svR YGGju[W\ svT XGGju[W\ < Waveform for driving TRAY open / close motor > < Signal check point > 3-21 ONE POINT REPAIR GUIDE NO OPERATION OF MD When no sound output in the CD function, you can not listen to music reading data from a CD disc if the pickup module in MD doesn’t work. This step is for checking the LASER TRACKING ACTUATOR. 5-4. LASER TRACKING ACTUATOR 5-4-1. Solution Please check and replace IC407, IC408 on MAIN board. 5-4-2. How to troubleshoot (Countermeasure) The tracking actuator makes the laser beam be positioned in the center of a track on CD disc. 1) Check the TRD signal from Pin14 of IC407. If no signal, check 3.3 V(RF) and X402. 2) Check T- & T+ from IC408 to CN404 for driving the tracking actuator. If no signal, check +1.8 V and +5 V for IC408. 3) Check if the FFC cable is solidly connected between CN404 and MD. 4) Check the MD. If the pick-up module has any trouble, it can not move the laser beam on the left or right side. Please check the function after changing another MD. 5-4-3. Service hint (Any picture / Remark) ju[W[ {R ZGGju[W[ {T Gju[W[ {RGGju[W[ {T YGGju[W[ < Waveform of T± for driving TRACKING actuator > < Signal check point > 3-22 ONE POINT REPAIR GUIDE NO OPERATION OF MD When no sound output in the CD function, you can not listen to music reading data from a CD disc if the pickup module in MD doesn’t work. This step is for checking the LASER FOCUSING ACTUATOR. 5-5. LASER FOCUSING ACTUATOR 5-5-1. Solution Please check and replace IC407, IC408 on MAIN board. 5-5-2. How to troubleshoot (Countermeasure) The focusing actuator makes the laser beam keep a regular interval with the surface of a CD disc. 1) Check the FOD signal from Pin13 of IC407. If no signal, check 3.3 V(RF) and X402. 2) Check F- & F+ from IC408 to CN404 for driving the focusing actuator. If no signal, check +1.8 V and +5 V for IC408. 3) Check if the FFC cable is solidly connected between CN404 and MD. 4) Check the MD. If the pick-up module has any trouble, it can not move the laser beam on the top or bottom side. Please check the function after changing another MD. 5-5-3. Service hint (Any picture / Remark) {T ju[W[ mR `GGju[W[ mRGGju[W[ mT ]GGju[W[ mT Gju[W[ < Waveform of TR± for driving FOCUSING actuator > < Signal check point > 3-23 ONE POINT REPAIR GUIDE 6. NO SOUND There is no sound output in the CD FUNCTION, repair the set according to the following guide. 6-1. IN THE CD FUNCTION 6-1-1. Solution Please check and replace IC501, IC602, IC801 on MAIN board. 6-1-2. How to troubleshoot (Countermeasure) 1) Check CD_BCK, CD_LRCK, & CD_DATA signals from IC407 to IC501. If no signal, check if the RF & servo signals from MD is entered to IC407. Refer to the “No operation of MD” guide. 2) Check the following I2S signal flow. < I2S audio signal Interface > - DAC_BCK: IC501_pin4 --> IC507_pin14, 16 --> R821 of IC801 (Beat option) & IC602_pin4 - DAC_LRCK : IC501_pin5 --> IC507_pin5, 7 --> R820 of IC801 (Beat option) & IC602_pin5 (44.1 kHz) - DAC_DATA : IC501_pin6 --> R817 next to IC801(Beat option) --> IC602_pin6, 9 - DAC_MCLK : IC501_pin3 --> R818 next to IC801 If there is any trouble, check the power for each IC. The power is normal but, if the signal waveform to the IC is distorted or no signal, replace it with a new one. 3) Check if “Digital audio AMP block”. 6-1-3. Service hint (Any picture / Remark) IC407 BU9543KV AMP IC TAS5631B khjtjsrGOX]U`Zto¡P khjijrGOXU[to¡P khjkh{h khjsyjrGO[[UXro¡P < Waveform of I2S audio interface signals > < I2S Signal Flow > 3-24 ONE POINT REPAIR GUIDE NO SOUND There is no sound output in the USB FUNCTION, repair the set according to the following guide. 6-2-1. IN THE USB FUNCTION 6-2-1-1. Solution Please check and replace IC501, IC504 on MAIN board & IC3U01 on USB board. 6-2-1-2. How to troubleshoot (Countermeasure) 1) Check +5VU to USB board. If +5.6VA to pin2 of IC3U01(LDO) doesn’t come out, check pin21~23 of CN103. If +5.6VA is normal & +5VU of IC3U01 pin3 doesn’t come out, then replace IC3U01. 2) Check USB D± from main board to USB board. a. Check USB_HUB_DN/DP signals to IC501(pin16, 17) b. Check USB1/2_DN/DP signals from IC504 to CN502 (pin1, 2, 4, & 5) If there is any trouble, check the power for each IC. The power is normal but , if the signal waveform to the IC is distorted or no signal, replace it with a new one. 3) Check if “Digital audio AMP block”. 6-2-1-3. Service hint (Any picture / Remark) {T IC504 USB2512B USB1_D+/USB2_D+/- USB Board kRGGXWGGju\WY USB kT GGXXGGju\WY USB_D+/- AMP IC TAS5631B < Waveform of USB D± signal > < USB function signal flow > 3-25 ONE POINT REPAIR GUIDE NO SOUND There is no sound output in the USB FUNCTION, repair the set according to the following guide. 6-2-2. IN THE USB FUNCTION 6-2-2-1. Solution Please check and replace IC501, IC504 on MAIN board & IC3U01 on USB board. 6-2-2-2. How to troubleshoot (Countermeasure) 1) Check +5VU to USB board. If +5.6VA to pin1 or pin2 of CN3U1. 2) Check USB D± from main board to USB board. a. Check USB_HUB_DN/DP signals to IC501(Pin16, 18) b. Check USB1/2_DN/DP signals from IC504 to CN502 (Pin1, 2, 4, & 5) If there is any trouble, check the power for each IC. The power is normal but , if the signal waveform to the IC is distorted or no signal, replace it with a new one. 3) Check if “Digital audio AMP block” Item 6-3 is normal. 6-2-2-3. Service hint (Any picture / Remark) {T {T IC504 USB2512A DAC_MCLK USB Board USB ADC_DATA IC501 MLC3700 DAC_DATA USB_D DAC_BCK DAC_LRCK IC602 PS9854 PWM AMP IC TAS5631 DAC_MCLK kT GG\GGju\WY IC801 FS503B BEAT_DATA BEAT BOX kRGGG[GGju\WY < Waveform of USB D± signal > < USB function signal flow > 3-26 ONE POINT REPAIR GUIDE NO SOUND There is no sound output by DIGITAL AUDIO AMP DAMAGE, repair the set according to the following guide. 6-3. BY DIGITAL AUDIO AMP DAMAGE (IN ALL FUNCTIONS) 6-3-1. Solution Please check and replace IC701, IC702, IC703 on MAIN board. 6-3-2. How to troubleshoot (Countermeasure) 1) Check FL±, FR±, RL±, RR±, SW1±, & SW2± signals from IC602 to IC701, IC702 & IC703 each input function. If no signal, check if I2S audio signals are entered to IC602. Refer to “I2S audio signal interface”. 2) Check PVDD_50V. If 50 V is abnormal, check the SMPS. 3) Check +12 for driving the gate of AMP IC. a. All the powers are normal, but if +12 V is low, there is possible for AMP IC to be damaged. b. Remove a ferrite bead among FB703, FB707 and FB713 one by one. When removed a ferrite bead, if +12 V is recovered, the IC connected to it was damaged. c. Replace the IC with a new one. 4) Check the impedance between SPK+ & GND and SPK- & GND. a. If the impedance is 0 Ω, the IC must be damaged. b. After removing the heat sink, replace it with a new one. Comments !! If a AMP IC among three is damaged, “AMP_PDN” to R103 changes HIGH to LOW at regular intervals. The sound is not output by AMP power down function. 6-3-3. Service hint (Any picture / Remark) msSGys pj^WX z~XVY pj^WY mySGyy y XWZOh tw wkuP pj^WZ pjXWX ilhk < Signal check point > 3-27 ONE POINT REPAIR GUIDE NO SOUND There is no sound output in the AUX FUNCTION, repair the set according to the following guide. 6-4. IN THE AUX FUNCTION 6-4-1. Solution Please check and replace IC202 on MAIN board. 6-4-2. How to troubleshoot (Countermeasure) 1) Check AUX_L/R signals to IC202 (Pin7, 8). 2) Check if ADC_BCK, ADC_LRCK, & DAC_MCLK are entered from IC501 to IC202. 3) Check if ADC_DATA is entered from IC202 to IC501. If no signal, check +5 V & +3.3 V(ADC) for IC202. If is NG, replace it a new one. 4) Check the following I2S signal flow from IC501 to IC602. (Refer to Item 6-1.) If there is any trouble, check the power for each IC. The power is normal but, if the signal waveform to the IC is distorted or no signal, replace it with a new one. 5) Check if the digital audio AMP block is okay. Refer to “Digital Audio AMP” guide on Item 6-3. If AMP is damaged, replace it with a new one. 6-4-3. Service hint (Any picture / Remark) {T {T IC202 CS5346 DAC_MCLK h| sGGyYWY h| yGGyYWZ AUX ADC_DATA IC501 MLC3700 DAC_DATA AUX_L/R khjtjsrGGyYYX DAC_BCK DAC_LRCK IC602 PS9854 PWM AMP IC TAS5631 pjYWY hkjkh{hGGGyYX\ DAC_MCLK IC801 FS503B BEAT_DATA BEAT BOX hkjijrGGyYX] hkjsyjrGGyYX` < AUX function signal flow > < Signal check point > 3-28 ONE POINT REPAIR GUIDE NO SOUND There is no sound output in the PORT. IN FUNCTION, repair the set according to the following guide. 6-5. IN THE PORT. IN FUNCTION 6-5-1. Solution Please check and replace IC202 on MAIN board. 6-5-2. How to troubleshoot (Countermeasure) 1) 2) 3) 4) 5) Check PT_L/R signal from Main board to USB board. Check if PT_LR is entered from Pin1 & 3 of CN3M01 to Pin1 & 3 to CN202. Check POT_L/R signals to IC202(Pin21, 22). Check if ADC_BCK, ADC_LRCK, & DAC_MCLK are entered from IC501 to IC202. Check if ADC_DATA is entered from IC202 to IC501. If no signal, check +5 V & +3.3 V(ADC) for IC202. If is NG, replace it a new one. 6) Check the following I2S signal flow from IC501 to IC602. (Refer to Item 5-1.) If there is any trouble, check the power for each IC. The power is normal but , if the signal waveform to the IC is distorted or no signal, replace it with a new one. 7) Check if the digital audio AMP block is okay. Refer to “Digital Audio AMP” guide on Item 6-3. If AMP is damaged, replace it with a new one 6-5-3. Service hint (Any picture / Remark) {T IC202 CS5346 DAC_MCLK MIC Board POT. IN w{sGGYX ADC_DATA IC501 MLC3700 DAC_DATA h| sGGyYWY POT_L/R DAC_BCK DAC_LRCK IC602 PS9854 PWM hkjtjsrGGyYYX AMP IC TAS5631 pjYWY DAC_MCLK w{yGGYY IC801 FS503B BEAT_DATA BEAT BOX hkjkh{hGGGyYX\ kRGGGXXGGju]WY hkjijrGGyYX] hkjsyjrGGyYX` < PORT. IN function signal flow > < Signal check point > 3-29 ONE POINT REPAIR GUIDE NO SOUND There is no sound output in the TUNER FUNCTION, repair the set according to the following guide. 6-6. IN THE TUNER FUNCTION 6-6-1. Solution Please check and replace IC202, TU101 on MAIN board. 6-6-2. How to troubleshoot (Countermeasure) 1) Check if TUNER_LR is entered from Pin1 & 3 of T1U01 to IC202(Pin23, 24). If no signals, Check +3.3 V for Tuner power. Check if the Tuner control signals (CLK, DAT, CE, RST, GPO2) are entered from IC101 to TU101. If it doesn’t work, replace TUNER with a new one. 2) Check if ADC_BCK, ADC_LRCK, & DAC_MCLK are entered from IC501 to IC202. 3) Check if ADC_DATA is entered from IC202 to IC501. If no signal, check +5 V & +3.3 V(ADC) for IC202. If is NG, replace it a new one. 4) Check the following I2S audio signal flow from IC501 to IC602. (Refer to Item 5-1.) If there is any trouble, check the power for each IC. The power is normal but, if the signal waveform to the IC is distorted or no signal, replace it with a new one. 5) Check if the digital audio AMP block is okay. Refer to “Digital Audio AMP” guide on Item 6-3. If AMP is damaged, replace it with a new one. 6-6-3. Service hint (Any picture / Remark) {T IC202 CS5346 DAC_MCLK TUNER ADC_DATA IC501 MLC3700 DAC_DATA h| sGGyYWY TUNER_L/R DAC_BCK DAC_LRCK IC602 PS9854 PWM hkjtjsrGGyYYX {|ulysG GYZ AMP IC TAS5631 pjYWY DAC_MCLK {|ulyyG GY[ IC801 FS503B BEAT_DATA BEAT BOX hkjkh{hGGGyYX\ hkjijrGGyYX] hkjsyjrGGyYX` < TUNER function signal flow > < Signal check point > 3-30 ONE POINT REPAIR GUIDE NO SOUND There is no sound output in the MIC IN FUNCTION, repair the set according to the following guide. 6-7. IN THE MIC IN FUNCTION 6-7-1. Solution Please check and replace IC603, IC605 on MAIN board. 6-7-2. How to troubleshoot (Countermeasure) 1) Check MIC_SIG signal to Pin6 of CN601. If no signal, Check the signal to Pin6 of CN3M01 on the MIC board. Check if the signal is entered from Pin6 of CN3M01 to MAIN board. 2) Check if MIC_SIG is entered from Pin6 of CN601 to pin3 of IC605 (MIC AMP). 3) Check if the amplified signal is entered from pin4 of IC605. If no signal output, check +12 V for IC605, replace IC605 with a new one if it has a problem. 4) Check if MIC_BCK & MIC_LRCK is entered from IC507 to IC603 and DAC_MLCK from IC501 to IC603. Check if MIC_DATA is entered from Pin9 of IC603 to pin7 of IC602. If no signal, check +5 V & +3.3 V for IC603. If it is abnormal, change replace it a new one. 6) Check the following I2S signal flow from IC603 to IC602. If there is any trouble, check the power for each IC. If the signals are abnormal, replace it a new one. 7) Check if the digital audio AMP block is okay. Refer to “Digital Audio AMP” guide on Item 6-3. If AMP is damaged, replace it with a new one. 6-7-3. Service hint (Any picture / Remark) IC603 AK5358 DAC_MCLK MIG_SIG MIC Board tpjtjsrUGwpuGXX tpjsyjrUGwpuGXW MIC_I_DATA IC501 MLC3700 DAC_DATA IC605 S4308 tpjijrUGwpuGXY MIC IN DAC_BCK DAC_LRCK IC602 PS9854 PWM AMP IC TAS5631 DAC_MCLK tpjpkh{hUGwpuG` IC801 FS503B BEAT_DATA BEAT BOX tpjzpnUGGXMYG < MIC IN function signal flow > < Signal check point > 3-31 ELECTRICAL TROUBLESHOOTING GUIDE 1. POWER SUPPLY ON SMPS BOARD No output 5.7 VA F901 normal? NO Replace F901 (same fuse). YES BD901 normal? NO Replace BD901. YES D904 normal? NO Replace D904. YES D933, D937 normal? NO Replace D933, D937. YES Power line of MAIN PCB is short. 3-32 ELECTRICAL TROUBLESHOOTING GUIDE No output 12 V F901 normal? NO Replace F901 (same fuse). YES BD901 normal? NO Replace BD901. YES D904 normal? NO Replace D904. YES D934, D935 normal? NO Replace D934, D935. YES IC931 normal? NO Replace IC931. YES Power Line of Main PCB is short. 3-33 ELECTRICAL TROUBLESHOOTING GUIDE No output FL+ / FL- P-CTRL OK? NO Check 12 V output & P-CTRL. YES D931, D932 OK? NO Replace D931, D932. YES ZD931 OK? NO Replace ZD931. YES FR931 short? NO Replace FR931. YES Check soldering of PN901. 3-34 ELECTRICAL TROUBLESHOOTING GUIDE No AMP Output Is the VCC supplied to IC911 Pin7? NO YES P-CTRL OK? YES NO Replace ZD912, ZD913. YES D951, D952 OK ? Check 3.3 V & P-CTRL. YES Q901,D904 OK? ZD912, ZD913 OK ? NO NO Replace D951, D952. YES Check soldering of CN902. 3-35 NO Replace D904, Q901, PC911. ELECTRICAL TROUBLESHOOTING GUIDE 2. SYSTEM PART Power on. “HELLO” Display on FLD OK? NO YES CN301 cable connection OK? NO Check FFC cable (17P). YES CN301 Pin15, 16, 17 power OK? NO Check SMPS board. YES CN301 Pin8, 9, 10 data signal OK? NO Check MAIN board. YES Port P1~G15 of DIG301 is OK? NO Replace IC301. YES Replace DIG301. Volume LED (LD3V01~LD3V8) Turn on? NO CN3V01 pin22 +12 V OK? NO Check SMPS board. YES YES Replace LED (LD3V01~LD3V8). When turn the volume, count is change? YES FRONT board OK. NO CN3V01 pin23, 24 signal OK? YES Check MAIN board. 3-36 NO Check FFC cable. ELECTRICAL TROUBLESHOOTING GUIDE 3. NO AUDIO PART CD FUNCTION Can disc insert? NO YES LOAD +- OK? NO Is motor_open/ close OK? (IC408 Pin9,10) YES YES Check IC501. Is motor impedance about 12 Ω? NO Check Loading motor. Check IC408. NO Disc reading OK? NO OPU driving (Focusing & Tracking) OK? NO YES YES Check OPU. (Pick-up module) IC407 Pin34,35,36 I2S output signal OK? NO YES IC501 Pin95,96,97 I2S input signal OK? Focusing/ Tracking/ Sled Signal OK? IC407 RF & Servo signal OK? YES NO Check IC501. YES A 3-37 NO NO PD(CN404 Pin2) about 180 mV? Check FFC cable to CN404, CN405. ELECTRICAL TROUBLESHOOTING GUIDE USB play IC501 Pin16,18 USB_HUB_D output signal OK? NO Check IC501. YES When insert USB,IC504 Pin1,2,3,4 USB_D signal OK? IC3U01 USB power +5 VU OK? NO NO YES YES A AUX IC202 Pin7,8 AUX input signal OK? NO Check audio cable. YES IC202 Pin42,43,44 I2S input signal OK? NO Check IC501. YES IC202 Pin41 ADC data output signal OK? NO Replace IC202. YES A 3-38 Replace IC3U01. ELECTRICAL TROUBLESHOOTING GUIDE POT. IN IC202 Pin21,22 POT. IN input signal OK? NO Check MIC board. YES IC202 Pin42,43,44 I2S input signal OK? NO Check IC501. YES IC202 Pin41 ADC data output signal OK? NO Replace IC202. YES A TUNER IC202 Pin23,24 TUNER_L/R input signal OK? NO YES YES IC202 Pin42,43,44 I2S input signal OK? TU101 TUNER_L/R output signal OK? NO Check IC501. YES IC202 Pin41 ADC data output signal OK? NO Replace IC202. YES A 3-39 NO Check +3.3 V of TU101. ELECTRICAL TROUBLESHOOTING GUIDE A IC501 Pin4, 5, 6 I2S data output signal OK? NO Replace IC501. YES IC507 Pin2, 17 DAC_BCK/LRCK input signal OK? NO Check IC507. YES IC507 Pin7,14 BEAT_LRCK/BCK output signal OK? NO Replace IC507. YES IC501 Pin6 BEAT_DAC_DATA output signal OK? NO Check IC501. YES IC801 I2S input signal OK? NO Check IC501. YES IC801 BEAT_DATA output signal OK? NO Check IC801. YES B 3-40 ELECTRICAL TROUBLESHOOTING GUIDE 4. DIGITAL AUDIO AMP CHECK B IC602 I2S input signal OK? NO Check IC801 & IC501. YES IC602 PWM data output signal OK? NO Replace IC602. YES IC701 FL± / FR± input signal OK? IC702 SW1± input signal OK? NO YES YES Check IC602. +12 VA, +50 V Power voltage OK? NO Check SMPS. YES IC701 SPK_FL± / FR± output OK? NO IC702 SPK_SW output OK? Replace IC701. YES YES Check L701, L702, L704, L705. Check L708, L709, L710, L711. YES YES Check speaker cable connection. OK 3-41 NO Replace IC702. WAVEFORMS 1. SERVO WAVEFORM FE TE FOD RF Figure 1-1. CD-16M IC407 pin31 Figure 1-2. Servo - FE, TE, FOD, RF IC407 pin61, pin62, pin63 / IC408 pin1 3-42 2. MOTOR DRIVE WAVEFORM SP- SL- SP+ SL+ Figure 2-1. SP- & SP+ for driving Spindle motor IC408 pin17, pin18 Figure 2-2. SL- & SL+ for driving Spindle motor IC408 pin11, pin12 svT tv{jsvzl svR tv{vwlu Figure 2-3. LO- & LO+ for driving Tray motor IC408 pin9, pin10 3-43 3. AUDIO PATH WAVEFORM BCK BCK LRCK LRCK DATA DATA Figure 3-1. CD-I2S IC407 pin34, pin35, pin36 Figure 3-2. IC501 pin95, pin96, pin97 BCK AUDIO_L LRCK AUDIO_R DATA Figure 3-3. IC602(PWM IC) pin4, pin5, pin6, pin9 Figure 3-4. AUDIO_L/R 3-44 4. ADC WAVEFORM MCK CLK BCK LRCK DATA DATA Figure 4-1. ADC I2C IC202 pin1, pin2 Figure 4-2. ADC I2S IC202 pin41, pin42, pin43, pin44 3-45 5. USB WAVEFORM 6. CRYSTAL WAVEFORM p D+ v D- Figure 5. USB D+/DCN502 pin1, pin2 & pin4, pin5 Figure 6. 12 MHz crystal IC501 pin27, pin28 3-46 WIRING DIAGRAM (#0 670'4 8%% 5RGCMGT6GTOKPCN /QFWNG #&% 2 %0 #/2$.1% 6#5 '# 4( 9CHGT2 %0 25 %0 %&&52 ((%%QP2 %0 *CTPGUU2 %0 5'481 9CHGT2 ((%2OO AMP /+%1/ /#+02%$ %#$.'2#9) %#$.'2#9) %#$.'2#9) ((%2OO 9CHGT2 %0/ /KELCEM 2QTVCDNGLCEM %#$.'2#9) ((%2OO ((%%QP2 %0 (41062%$ 2QTV /KE2%$ ((%%QP2 %0 ZPGkljrGG tljohupzt AMP *CTPGUU2 %0 ((%%QP2 %0 MOT 2 #WZLCEM ((%%QP2 %0 P/UP ((%2OO 9CHGT2 9CHGT2 8(&2%$ 9CHGT2 %07 6TCPU ((%%QP2 %08 5/252%$ 8QNWOG75$ 2%$ 3-47 3-48 BLOCK DIAGRAMS 1. SMPS BLOCK DIAGRAM TZY} } mk MAIN TRANS STR-A6053 for Main Power } rr XY} vw htwVmhu Rectifier Circuit (Bridge, CAPACITOR) pw vkGVG|ziGVGtwlnVGkjkj \U]} } mk [U\} w Tj{ys Filter Section (Varistor, Resistor, Line Filter Thermistor) Snubber \W} AC NCP1252 Control IC Digital Power AMP TRANS AMP Power & FET 3-49 FL MAIN & AMP 3-50 FR SW ms ORVTP 2. MAIN SYSTEM BLOCK DIAGRAM A,B,C,D,E,F,PD 8A4( 8A%& 8 IC407 LD CD_RST 8 IC408 M S3053 Motor Drive MOT_MUTE,CLOSE,OPEN 8A75$ IC504 _ LOADs,SLEDs, SPINs,TRs,Fs USB2 , P/UP USB1 16.9344MHz 15pF SUBSYQ, BUSY,CD 16M CD_R/W, CD_MCK/BCK /LRCK/DATA BU9543KV RF+ SERVO SPDO/SLDO/FOD/TRD CD_DIN_DOUT 8%% USB2512 USB HUB USB_HUB_DP/DN USB_RESET/SCL/SDA 8A%&8%% OP_SW,CL_SW,UP_SW,DN_SW,D_SE NSE kljrGG tljohupzt 8A%& DRM_WEN/CAS/RAS/SEL/CLK/CKE IC502 M12L6464A SDRAM SF_DI/DO IC503 SF_CS/SCK MX25L8006 1MB(S/F) 9.8304MHz 33pF FRONT 8(& M00_15/A00_16 8A%& 8A7%1/ IC501 MLC3700 MCS LOGIC ADC_PWM_CLK/BCK/LRCK/DAT, ADC_RST,DAC_MCLK MIC_MCLK/BCK/ LRCK MIC_I_DATA CD_DVD_DI 32.768KHz 22pF/27pF +4 8QNWOG IC603 MIC_O_DATA AUX_L/R AUX 8 MIC_SIG0 TUNER A/+% IC605 MIC_SIG 8 8 8 IC101 PWM_LRCK/BCK (DAC_DATA) FR · IC602 PS9854 PWM E2PROM_CLK/DATA SW1· IC701 AMP IC TAS5631 -G[ 8A7%1/ IC100 EEPROM MIC S4308 FL· MICOM LC87F085 4GEGKXGT Portable TUNER_L/R 19.2MHz 22pF &+) PT_L/R 8 8 AK5358 VFD_STB/CLK/DO/RS T STANDBY_LED,VOL_LED1~7 USB_PWR_CTRL KEY1~3,JOG_A/B VOL_A/B,REMOCON IC200 CS5346 ADC_DATA CD_DVD_CE/ CLK/DO/RST 8 8A#&% IC702 ADC_PWM_DATA/CLK, EXT_MUTE,DSP_PWM_RS T AMP IC TAS5631 SPEANA AMP_PDN AMP_CLIP1/0, AMP_OTW/SD, AMP_READY, AMP_PROTECT 3-51 3-52 F/L F/R SW 310Wx2 310W CIRCUIT DIAGRAMS IMPORTANT SAFETY NOTICE WHEN SERVICING THIS CHASSIS, UNDER NO CIRCUMSTANCES SHOULD THE ORIGINAL DESIGN BE MODIFIED OR ALTERED WITHOUT PERMISSION FROM THE LG CORPORATION. ALL COMPONENTS SHOULD BE REPLACED ONLY WITH TYPES IDENTICAL TO THOSE IN THE ORIGINAL CIRCUIT. SPECIAL 1. SMPS CIRCUIT DIAGRAM COMPONENTS ARE SHADED ON THE SCHEMATIC FOR EASY IDENTIFICATION. THIS CIRCUIT DIAGRAM MAY OCCASIONALLY DIFFER FROM THE ACTUAL CIRCUIT USED. THIS WAY, IMPLEMENTATION OF THE LATEST SAFETY AND PERFORMANCE IMPROVEMENT CHANGES INTO THE SET IS NOT DELAYED UNTIL THE NEW SERVICE LITERATURE IS PRINTED. NOTE : 1. Shaded( ) parts are critical for safety. Replace only with specified part number. 2. Voltages are DC-measured with a digital voltmeter during Play mode. 12 11 10 9 8 7 6 5 4 3 2 CAUTION: Danger if fuse is incorrectly replaced. Replace only with the type identical to fuse rating and(or) model name described in main label. 1 A B C Warning Parts that are shaded are critical with respect to risk of fire or electrical shock. D E F G H I 3-53 J K L 3-54 M N O P Q R SMPS EAX64583501_Rev1.1-SD 2012. 01. 09 S T 2. MAIN - MICOM CIRCUIT DIAGRAM 12 11 10 9 8 7 6 5 4 3 2 1 MICOM EAX64550401_Rev1.2-SD(#1) 2012. 01. 09 A B C D E F G H I 3-55 J K L 3-56 M N O P Q R S T 3. MAIN - PWM / FILTER CIRCUIT DIAGRAM 12 11 10 9 8 7 6 5 4 3 2 1 PWM EAX64550401_Rev1.2-SD(#2) 2012. 01. 09 A B C D E F G H I 3-57 J K L 3-58 M N O P Q R S T 4. MAIN - IR AMP CIRCUIT DIAGRAM 12 11 10 9 8 7 6 5 4 3 2 1 AMP EAX64550401_Rev1.2-SD(#3) 2012. 01. 09 A B C D E F G H I 3-59 J K L 3-60 M N O P Q R S T 5. MAIN - DSP / USB / IPOD CIRCUIT DIAGRAM 12 11 10 9 8 7 6 5 4 3 2 1 DSP EAX64550401_Rev1.2-SD(#4) 2012. 01. 09 A B C D E F G H I 3-61 J K L 3-62 M N O P Q R S T 6. MAIN - RF SERVO CIRCUIT DIAGRAM 12 11 10 9 8 7 6 5 4 3 2 1 RF SERVO EAX64550401_Rev1.2-SD(#5) 2012. 01. 09 A B C D E F G H I 3-63 J K L 3-64 M N O P Q R S T 7. MAIN - ADC CIRCUIT DIAGRAM 12 11 10 9 8 7 6 5 4 3 2 1 ADC EAX64550401_Rev1.2-SD(#6) 2012. 01. 09 A B C D E F G H I 3-65 J K L 3-66 M N O P Q R S T 8. MAIN - BEAT BOX CIRCUIT DIAGRAM 12 11 10 9 8 7 6 5 4 3 2 1 BEAT BOX EAX64550401_Rev1.2-SD(#7) 2012. 01. 09 A B C D E F G H I 3-67 J K L 3-68 M N O P Q R S T 9. FRONT - VFD CIRCUIT DIAGRAM 12 11 10 9 8 7 6 5 4 3 2 1 VFD EAX64632201_Rev1.3(2)-SD 2012. 02. 23 A B C D E F G H I 3-69 J K L 3-70 M N O P Q R S T 10. FRONT - VOLUME CIRCUIT DIAGRAM 12 11 10 9 8 7 6 5 4 3 2 1 VOLUME EAX64632301_Rev1.3(2)-SD 2012. 02. 23 A B C D E F G H I 3-71 J K L 3-72 M N O P Q R S T 11. FRONT - MIC & PORTABLE CIRCUIT DIAGRAM 12 11 10 9 8 7 6 5 4 3 2 1 MIC & PORTABLE EAX64632401_Rev1.3(2)-SD 2012. 02. 23 A B C D E F G H I 3-73 J K L 3-74 M N O P Q R S T CIRCUIT VOLTAGE CHART 1. ICs No. IC Sym IC101 1 MICOM 2 IC102 IC103 Voltage detectors IC104 3 LDO IC201 4 Noise Isolation Amplifier IC Name / Type Vcc/Vdd LC87F5NC8A (SANYO) TYPE: 100P VENDER: SANYO VDD: 14, 40, 55, 89 Spec: VDD: +2.8 ~ +5.5V Measured volt.: VDD: 3.392V AZ7027RTRE1 TYPE: 3P VENDER: BCD Vcc:1, Vout:3 AZ1117BH-ADJ TYPE:3P VENDER: BCD VIN: 3 VOUT: 2,4 NJM2794RB2 TYPE: 10P VENDER: JRC V+:4 No. IC Sym IC408 10 Motor Drive (5ch) Spec: VCC: Max 18V Measured volt.: Vcc: 3.53V Spec: Vin: Max 12V Vout:Max 10V Measured volt.: Vin:5.65V Vout: 3.68V Spec: VIN: 4.3~13V Measured volt.: VIN: 11.9V IC202 5 ADC IC203 6 LDO IC204 7 LDO IC406 8 Motor Drive (1ch) IC407 LM37102D TYPE:8P VENDER:TAEJIN VIN: 2 Vout: 3 Spec: VIN: 2.25V~16V Vout: 2.22~16.16V Measured volt.: VIN: 5.63V Vout: 5.07V LM37102D TYPE:8P VENDER:TAEJIN VIN: 2 Vout: 3 Spec: VIN: 2.25V~16V Vout: 2.22~16.16V Measured volt.: VIN: 5.61 Vout: 5.02 S8082 TYPE:8P VENDER:AUK PVCC,SVCC:6,7 Spec: PVCC,SVCC: 4.3 ~ 13.2V Measured volt.: PVCC,SVCC:5.1V BU9543KV TYPE:64P VENDER: ROHM 9 RF IC Spec: VA: 4.75~5.25V VD: 3.13~3.47V VLS: 3.13~5.25V VLC: 3.13~5.25V Measured volt.: VA: 5.1V VD: 3.29V VLS: 3.29V VLC: 3.29V DVDD,AVDD: 1,17,33,47,53,59 VDD_CORE: 26,37 Spec: DVDD,AVDD: 2.7V ~ 3.6V VDD_CORE: 1.75 ~ 1.95V Measured volt.: DVDD,AVDD: 3.29V VDD_CORE: 1.85V S3053 TYPE:28P VENDER: AUK VCC1,2 :8,19 MLC3700A TYPE:176P VENDER:MCS LOGIC IC501 11 DSP IC502 12 SDRAM CS5346_ADC TYPE:48P VENDER: CIRRUS LOGIC VA:14/ VD: 46/ VLS: 36 VLC: 5 IC Name / Type IC503 13 Serial Flash IC504 14 USB HUB IC505 15 LDO IC506 16 CP CHIP IC507 17 BUFFER IC509 18 LDO VDD33,UVDDA33, PXI_VDD33,ADCV DD33:1,14,20,22,2 6,36,50,87, 99,117,141,167 VDD12 :8,24,65,89,151,161 M12L64164A TYPE:54P VENDER: ESMT VDD,VDDQ :1,3,9,14,27,43,49 Vcc/Vdd Spec: VCC1,2: 4.3 ~ 13.2V Measured volt.: VCC1,2: 5.1V Spec: VDD33,UVDDA33, PXI_ VDD33,ADCVDD33 :+3.135 ~ +3.465V VDD12: +1.14 ~ +1.26V Measured volt.: VDD33,UVDDA33, PXI_ VDD33,ADCVDD33 :3.30V VDD12: 1.20V Spec: VDD,VDDQ: +3.0 ~ +3.6V Measured volt.: VDD,VDDQ: 3.29V MX25L8006EM2I TYPE:8P VENDER:MX VCC:8 Spec: VCC: 2.7V ~ 3.6V Measured volt.: VCC: 3.29V USB2512B TYPE:36P VENDER:SMSC VDD33: 5,10,15,23,29,36 Spec: VDD: 3.0V ~ 3.6V Measured volt.: VDD: 3.29V LM27152RS TYPE: 5P VENDER: TAEJIN VIN:2, Vout:4 Spec: Vin: Max 26V Vout:Max 25V Measured volt.: Vin: 5.65V Vout:3.29V MFI337S3959 TYPE:8P VENDER: APPLE VCC:9 Spec: VDD: 1.62V ~ 5.5V Measured volt.: VDD: 3.29V No. IC Sym IC601 19 LDO IC602 20 PWM Controller IC603 21 ADC Spec: Vcc: 2.0V ~ 5.5V Measured volt.: VDD: 3.29V AZ1117BH-1 .2TRE1 TYPE:3P VENDER:BCD VIN:3, Vout:2 Spec: Vin: Max 12V Vout: 1.176 ~ 1.224V Measured volt.: VDD: 3.29V Vout: 1.2V 3-75 LM37102D TYPE: 8P VENDER: TAEJIN VIN:2, Vout:3 PS9854 TYPE: 68P VENDER: PULSUS VDD_ IO:5,30,33,37,42,51 VDD_IN1,2: 64,67 VDD_OUT1,2, VDD_core: 1,63,60,45,22 Vcc/Vdd Spec: Vin: +2.25 ~ +16V Vout:+1.25 ~ +15V Measured volt.: Vin: 3.68V Vout:3.27V Spec: VDD_IO: 2.97~3.63V VDD_IN1,2: 2.2~3.3V VDD_OUT,VDD_ core: 1.08~1.32V Measured volt.: VDD_IO: 3.27V VDD_IN1,2: 3.27V VDD_OUT,VDD_ core: 1.25V AK5358 TYPE:16P VENDER:AKM VA:6 VD:7 Spec: VA:4.5~5.5V VD:2.7~3.6V Measured volt.: VA:5.21V VD:3.28V S4308 TYPE: 6P VENDER: AUK VCC: 6 Spec: VCC: +5 ~ +14V Measured volt.: VCC: 11.45V TAS5631B TYPE: 64P VENDER: Texas Instrument PVDD_x: 30,31,38,39, 42,43,50,51 GVDD_x: 25,26,55,56 VDD:64 Spec: PVDD_x: +25 ~ +52.5V GVDD_x: +10.8 ~ +13.2V VDD: +10.8 ~ +13.2V Measured volt.: PVDD_x: 49.8V GVDD_x: 12.1V VDD: 12.1V No. IC Sym IC803 26 BUFFER IC IC805 27 MEMORY IC3U01 28 LDO 29 IC3V01 IC3V02 LED DRIVER ICW51 30 LED DRIVER IC605 22 23 pre amplifier IC IC701 IC702 IC703 AMP IC801 24 74AHC244FT TYPE:20P VENDER:Philips VCC:20 IC Name / Type BEAT BOX IC IC802 25 LDO 3-76 FS-503B TYPE: 252P VENDER: FINE ARCH VIN: W17,W18,N18 ,U18,N19,C19,B15, D9,D12,E3,G17,K3 ,N17,R3,R9,T12,C9 ,B3,A8,B9A15,B18, A18,W2,V18,A5,E1, E2,F2,L1,V2,T1,W1 0,W13,V17, TJ4220GPD TYPE:8P VENDER:HTC VIN: 3 Vout: 6 Spec: VIN: VDDE: 1.1~1.3V VDDK: 3.0~3.6V Measured volt.: VIN: VDDE: 1.21V VDDK: 3.32V Spec: VIN: 2.5~6V Vout: 1.17~1.23V Measured volt.: VIN: 3.27V Vout: 1.23V IC Name / Type Vcc/Vdd 74AHC244FT TYPE:20P VENDER: TOSIBA VIN: 2,4,6,8,11,13,15,17 Vout: 3,5,7,9,12,14,16,18 Spec: VIN: 2~5.5V Vout: 0~VIN Measured volt.: VIN: 3.28V Vout: 3.29V MX25L3206EM2I12G TYPE:8P VENDER: MX VCC: 8 Spec: VCC: 2.7~3.6V Measured volt.: VIN: 3.27V LM37102D TYPE:8P VENDER:TAEJIN VIN: 2 Vout: 3 Spec: VIN: 2.25V~16V Vout: 2.22~16.16V Measured volt.: VIN: 5.65V Vout: 5.09 BU2090F TYPE:16P VENDER:ROHM VDD: 16 Spec: VDD: 4.3~13V Measured volt.: VDD: 3.57V BU2090F TYPE:16P VENDER:ROHM VDD: 16 Spec: VDD: 4.3~13V Measured volt.: VDD: 3.57V MEMO 2. CAPACITORS No. Location Value Capacitor (uF) 01 C122 100uF 02 C151 47uF 03 C124 1000uF 04 C601 100uF 16V 3.32 01 C243 05 C682 220uF 6.3V 3.32 02 06 C620 220uF 6.3V 1.23 03 07 C655 10uF 16V 2.4 04 C319 08 C660 47uF 16V 3.31 05 C313 09 C676 4.7uF 50V 2.09 10 C679 100uF 16V 11.5 01 C3V20 47uF 16V 3.57 11 C681 1uF 16V 0 02 C3V24 47uF 16V 3.52 12 C713 470uF 100V 49 13 C734 470uF 100V 49 14 C706 10uF 16V 12.3 15 C700 10uF 16V 3.28 16 C753 470uF 100V 49 17 C774 470uF 100V 49 18 C746 10uF 16V 19 C780 10uF 16V Voltage Spec Measured voltage <MAIN> No. Location Value Capacitor (uF) Voltage Spec Measured voltage 44 C244 100uF 16V 5.61 3.31 45 C231 47uF 16V 5.08 16V 3.43 46 C236 10uF 16V 5.19 16V 3.41 47uF 16V 12.1 C303 47uF 50V 7.2 C322 47uF 50V 3.24 47uF 50V 31.9 220uF 6.3V 3.47 16V <VFD> <VOLUME> <Woofer> 01 CW54 47uF 16V 3.28 <SMPS> 100V -10% 240V/50Hz +10% Measured voltage Measured voltage No. Location Value Capacitor (uF) 12.2 01 C903 1000uF 315V 122.3V 190V 3.24 02 C904 1000uF 315V 123.9V 180.7V C905 33uF 500V 245.9V 370.1V Voltage Spec. 20 C793 470uF 100V 49 03 21 C784 470uF 100V 49 04 C908 47uF 50V 15.34V 15.33V C912 47uF 50V 18.47V 18.59V 13.8V 22 C786 10uF 16V 12.1 05 23 C760 100uF 16V 11.3 06 C914 47uF 50V 12.68V 3.32 07 C931 330uF 16V 4.81V 4.8V C932 100uF 50V 31.96V 31.98V 24 C876 10uF 16V 25 C531 47uF 16V 4.89 08 26 C550 47uF 16V 1.21 09 C933 1000uF 16V 5.75V 5.75V C935 1000uF 25V 12.63V 12.62V 27 C525 47uF 16V 3.28 10 28 C527 47uF 16V 1.21 11 C942 100uF 16V 11.99V 11.98V 12 C953 2200uF 80V 47.9V 48.1V 29 C533 47uF 16V 3.32 30 C570 10uF 16V 3.28 31 C413 100uF 16V 5.09 32 C457 47uF 16V 3.28 33 C458 47uF 16V 3.27 34 C462 47uF 16V 3.32 35 C431 47uF 16V 1.65 36 C467 3.3uF 50V 1.74 3.32 37 C492 47uF 16V 38 C4H6 100uF 6.3V 1.83 39 C485 220uF 16V 5.08 40 C210 10uF 16V 2.47 41 C211 47uF 16V 4.98 42 C213 47uF 16V 4.97 43 C221 100nF 16V 3.28 3-77 3-78 PRINTED CIRCUIT BOARD DIAGRAMS 1. SMPS P.C.BOARD (TOP VIEW) 3-79 3-80 SMPS P.C.BOARD (BOTTOM VIEW) NOTE) Warning Parts that are critical with respect to risk of fire or electrical shock. 3-81 3-82 2. MAIN P.C.BOARD (TOP VIEW) 3-83 3-84 MAIN P.C.BOARD (BOTTOM VIEW) 3-85 3-86 3. FRONT_VFD P.C.BOARD (TOP VIEW) (BOTTOM VIEW) 3-87 3-88 4. FRONT_MIC & PORTABLE P.C.BOARD (TOP VIEW) (BOTTOM VIEW) 3-89 3-90 5. FRONT_VOLUME P.C.BOARD (TOP VIEW) 3-91 3-92 FRONT_VOLUME P.C.BOARD (BOTTOM VIEW) 3-93 3-94