Vf550m_lgd_lc550wud-Sba1 (t55usvzb1de-.Vf550m1) Service Manual

Service ManualModel #: VF550M_LGD _LC550WUD-SBA1 (T55USVZB1DE-.VF550M1) AMTRAN TECHNOLOGY CO., LTD. 17F, NO. 268, Lien Chen Rd., Chung Ho City Taipei County, Taiwan, 235 R.O.C. TEL : (02) 8228-0505 FAX : (02) 8228-0599 Confidential Document, Property of AmTRAN CO. LTD Table of Contents CONTENTS Sections 1. Features 2. Specifications 3. On Screen Display 4. Factory Preset Timings 5. Pin Assignment 6. Main Board I/O Connections 7. Theory of Circuit Operation 8. Waveforms 9. Trouble Shooting 10. Block Diagram 11. Spare parts list 12. Complete Parts List 1-1 2-1 3-1 4-1 5-1 6-1 7-1 8-1 9-1 10-1 11-1 12-1 PAGE Appendix 1. Main Board Circuit Diagram 2. Main Board PCB Layout 3. Assembly Explosion Drawing VF550M_LGD Service Manual increase the separation between equipment and receiver. INC. VF550M_LGD Service Manual . IBM and IBM products are registered trademarks of International Business Machines Corporation. Thus VINC Will not be held responsible for the product and its safety. reproduced or transmitted by any means for any purpose without prior written permission from VINC. EDID. pursuant to part 15 of the FCC Rules.Service Manual VF550M_LGD COPYRIGHT © 2000 V. which can be determined by turning the equipment off and on. FCC INFORMATION This equipment has been tested and found to comply with the limits of a Class B digital device. or an AC cord that meets the local safety standards. Macintosh and Power Macintosh are registered trademarks of Apple Computer. and if not installed and used in accordance with the instructions. VESA. Switzerland (SEV). ALL RIGHTS RESERVED. VINC and VINC products are registered trademarks of V. No part of this document may be copied. DPMS and DDC are registered trademarks of Video Electronics Standards Association (VESA). FCC WARNING To assure continued FCC compliance. Always use the AC cords as follows – USA (UL). there is no guarantee that the interference will not occur in a particular installation.” SAFETY CAUTION Use a power cable that is properly grounded. Inc. may cause harmful interference to radio communications. Inc. any unauthorized changes or modifications to Amtrak products will void the user’s authority to operate this device. or connect the into an outlet on a circuit different from that to which the receiver is connected. These limits are designed to provide reasonable protection against harmful interference in a residential installation.reorient or relocate the receiving antenna. Germany (VDE). the user is encouraged to try to correct the interference by one or more of the following measures -. If this equipment does cause unacceptable interference to radio or television reception. Canada (CSA). CE CERTIFICATION This device complies with the requirements of the EEC directive 89/336/EEC with regard to “Electromagnetic compatibility. the user must use a grounded power supply cord and the provided shielded video interface cable with bonded ferrite cores. Japan (Electric Appliance Control Act). Britain (BASEC/BS). Also. Energy Star is a registered trademark of the US Environmental Protection Agency (EPA). uses and can radiate radio frequency energy. This equipment generates. However. Simultaneous display of PC and TV images. 9. HDMI. 3. S-video. 8. color. Audio optical out. SG-0300 . Built in auto adjust function for automatic adjustment of screen display.e. sharpness. CONFIDENTIAL – DO NOT COPY Page 1-1 File No. High quality 1920X1080 pixel by pixel display. TV channel program. 10. 11.sound setting. Connectable to PC’s analog RGB port. Smoothing function enables display of smooth texts and graphics even if image with resolution lower than 1920X1080 is magnified. Power saving to reduce consumption power too less than 0. Picture In Picture (PIP) function to show TV or VCR images. Advanced video functions for personal favor. brightness. backlight). PIP. aspect and gamma or reset all setting.Chapter 1 1. On Screen Display: user can define display mode (i.5W. ATV and DTV. composite video. 4. 2. Built in HDTV. contrast. 5. Audio line out. Features Built in TV channel selector for TV viewing. 6. 7. TFT-LCD CHARACTERISTICS Model Name: LGD LC550WUD-SBA1 (Vendor: LG. Output Connectors SPDIF Out (Optical Audio) .)) Total 267. White Viewing Angle (CR>10) Power Consumption Weight Display Mode Surface Treatment Specification 54. U/D 178 (Min. Philips LCD Co.630 mm x 0.. Pixels.56 W (Typ. Input Connectors 1x Co-axial RF (ATSC/QAM/NTSC) 5x HDMI™** with HDCP (1 with Stereo Audio RCA) 2x Component YPbPr plus Stereo Audio 1x RGB PC plus Stereo Audio 1x S-Video plus Stereo Audio (shared with AV1) 2x Composite Video (AV1 & AV2) Service port (USB).) (Logic=7.0(H) x 745. Back Light=260W ) 19.8Kg (Typ.63 mm 1920 horiz. SG-0300 . Ltd) Item Active Screen Size Outline Dimension Pixel Pitch Pixel Format Color Depth Luminance. 1.). RCA (Audio OUT) CONFIDENTIAL – DO NOT COPY Page 2-1 File No.) Viewing angle free ( R/L 178 (Min. Normally black Hard coating(3H).06 B colors 500 cd/m2 (Center 1point . RGB stripe arrangement 10-bit.0mm) diagonal 1286.0 inch (1387.0(V) x 60.64.0mm(D)(Typ.) 0. Anti-glare treatment of the front polarizer (Haze 10%) 2. by 1080 vert.56 W.Typ.) Transmissive mode. 3.Chapter 2 Specification 1. 0 kg (with base) b.0 kg 9. Precautions Please pay attention to the followings when you use this TFT LCD module.75 Without stand 912. Width c. Depth 860.0 ±1.0 ±1.14. (2) You should consider the mounting structure so that uneven force (ex. Gross: 48.42 8. And the case on which a CONFIDENTIAL – DO NOT COPY Page 2-2 File No. Height b.49 342.4.0 ±1. WEIGHT (Physical weight) a. 9-1. Net: 34.14 1307. SG-0300 .0 kg (without base) 40. 90%RH(Non-condensing) Operating Altitude: 0 . 50/ 60 Hz Power Consumption: 385W MAX Power OFF: to less than 0. Mounting Precautions (1) You must mount a module using holes arranged in four corners or four sides. ENVIRONMENT Operating Temperature: 5c~35c (Ambient) Operating Humidity: Ta= 35 °C. 6.000 ft Non-Operating : 4000 ft 7. POWER SUPPLY Input Voltage Level: 100~240 Vac.49 125. DIMENSIONS (Physical dimension) (Unit: mm) With Stand a. Twisted stress) is not applied to the module.79 1307. Speaker Built in Speakers: 8Ω/15W (max) X 2 way.5W MAX (at 120 Vac) 5. CONFIDENTIAL – DO NOT COPY Page 2-3 File No.) (7) When the surface becomes dusty. Their long time contact with polarizer causes deformations and color fading. please wipe gently with absorbent cotton or other soft materials like chamois soaks with petroleum benzine. (In lower temperature. (8) Wipe off saliva or water drops as soon as possible. Transparent protective plate should have sufficient strength in order to the resist external force. (5) Acetic acid type and chlorine type materials for the cover case are not desirable because the former generates corrosive gas of attacking the polarizer at high temperature and the latter causes circuit break by electro-chemical reaction. it becomes longer. SG-0300 . And please do not rub with dust clothes with chemical treatment. response time(required time that brightness is stable after turned on) becomes longer. push or rub the exposed polarizers with glass. (3) Please attach the surface transparent protective plate to the surface in order to protect the polarizer.(In lower temperature. It should be lower than following voltage: V=±200mV(Over and under shoot voltage) (2) Response time depends on the temperature. toluene and alcohol because they cause chemical damage to the polarizer. (9) Do not open the case because inside circuits do not have sufficient strength. (4) You should adopt radiation structure to satisfy the temperature specification.module is mounted should have sufficient strength so that external force is not transmitted directly to the module. Operating Precautions (1) The spike noise causes the mis-operation of circuits. (6) Do not touch.(Some cosmetics are detrimental to the polarizer. Do not use acetone. Normal-hexane is recommended for cleaning the adhesives used to attach front / rear polarizers. it becomes lower.) And in lower temperature. tweezers or anything harder than HB pencil lead.) (3) Brightness depends on the temperature. Do not touch the surface of polarizer for bare hand or greasy cloth. 9-2. And don’t touch interface pin directly. the following precautions are necessary. Do not expose the module to sunlight or fluorescent light.(4) Be careful for condensation at sudden temperature change. Precautions for Strong Light Exposure Strong light exposure causes degradation of polarizer and color filter. LCM can’t be operated its full characteristics perfectly. Storage When storing modules as spares for a long time. (7) Please do not give any mechanical and/or acoustical impact to LCM. (8) A screw which is fastened up the steels should be a machine screw. remnant image is likely to occur. Otherwise. Grounding and shielding methods may be important to minimized the interference. Sufficient suppression to the electromagnetic interference shall be done by system manufacturers. (2) The polarizer surface should not come in contact with any other object. it is not strong to electrostatic discharge. 9-5. (1) Store them in a dark place. SG-0300 . (if not. 9-4. (5) When fixed patterns are displayed for a long time. Keep the temperature between 5°C and 35°C at normal humidity. smear or spot will occur. Condensation makes damage to polarizer or electrical contacted parts. And after fading condensation. Make certain that treatment persons are connected to ground through wrist band etc. it causes metallic foreign material and deal LCM afatal blow) (9) Please do not set LCD on its edge. CONFIDENTIAL – DO NOT COPY Page 2-4 File No. 9-3. Electrostatic Discharge Control Since a module is composed of electronic circuits. It is recommended that they be stored in the container in which they were shipped. (6) Module has high frequency circuits. static electricity is generated between the film and polarizer. please wipe them off with absorbent cotton waste or other soft material like chamois soaked with normalhexane. (3) You can remove the glue easily. SG-0300 . Handling Precautions for Protection Film (1) The protection film is attached to the bezel with a small masking tape. etc. (2) When the module with protection film attached is stored for a long time. sometimes there remains a very small amount of glue still on the bezel after the protection film is peeled off. This should be peeled off slowly and carefully by people who are electrically grounded and with well ion. CONFIDENTIAL – DO NOT COPY Page 2-5 File No. When the protection film is peeled off.blown equipment or in such a condition.9-6. When the glue remains on the bezel surface or its vestige is recognized. Game. Reset Picture Mode CONFIDENTIAL – DO NOT COPY Page 3-1 File No. Customers could operate it only by few buttons. DCR. Standard. Golf. Rich Color. Computer/Normal) g-6. Extend) g-4. Green/Blue) g-3. OPC) g-5. Main unit button Power MENU Input CH ▲ CH ▼ VOL + VOL – On Screen Display TV Source A. SG-0300 . Vivid. f. PICTURE： Picture Mode(Custom. Movie. d. Advanced Adaptive Luma(Off. Strong. Baseball) a. Strong) g-2. g. Low. e. Backlight Control (Off.Chapter 3 On Screen Display On Screen Display (OSD) is a friendly interface providing the function adjusting in our system. Film Mode (Auto/Off) g-8. b. Color Enhancement(Off. Cool. Normal. Smooth Motion g-7. Low. c. Basketball. Medium. Football. Medium. Color Temperature (Custom. Backlight(0~100) Brightness(0~100) Contrast(0~100) Color(0~100) Tint(-32~+32) Sharpness(0~7) Advanced Video g-1. Noise Reduction(Off. Green/Flesh. There is the introduction of the OSD. Modulation: k-4. TV： a. e. Equalizer a-1 120Hz a-2 500Hz a-3 1. Off) Channel Info k-1. f. Off. i. Indiana. Digital. Tuner Mode(Cable. Pacific. b. AUDIO： Audio Mode(Flat. Pop. Physical CH k-2. Variable) Lip Sync(0~5) Reset Audio Mod C. Analog/ Digital) From Channel (1~135 or 2~69) To Channel (1~135 or 2~69) Skip Channel MTS(ATV：Mono/Stereo/Sap；DTV：Language1/Language2/Language3) Time Zone(Atlantic. Eastern. Status: k-5. g. j. c. Antenna) Auto Search Partial Channel Search Scan Mode (Analog. g.B. e. d. i. 5 KHz a-5 10KHz Balance(-50~+50) SRS TSHD (On/Off) SRS TruVolume (On/Off) Digital Audio Out(PCM. Central.5 KHz a-4 b. Rock. SG-0300 . Frequency: k-3. SNR(dB): CONFIDENTIAL – DO NOT COPY Page 3-2 File No. Hawaii) Daylight Saving(On. k. h. h. Jazz) a. Classic. Newfoundland. Dolby Digital) Speakers(On/Off) Analog Audio Out(Fixed. Mountain. f. Arizona. Alaska. c. d. Medium. Wide ( Zoom1. Full. US Movie Rating h-5. 90Minutes.k-6. Normal. Parental h-1. Service2 Service3.…) b-3: PIP Position(TL. Digital CC Style g. Service4. Stretch. V-Size(0~100) (ATV support only) h.…. H/V Position g-1. PIP b-1: PIP Mode (Off. SETUP： a. Canadian French Rating h-7. CC2. H-Size(0~100) (ATV support only) g-4. CC3. Language(English. Espanol. Large) b-5: Audio Source (Main or PIP) c. Francais) b. CC4. POP) b-2: PIP Source(TV.Zoom2. Signal Strength: D. Service1. Service5. US TV Rating h-4. 120Minutes) d. SG-0300 . PIP. V-Position (0~32) (ATV support only) g-3. CC f-1. Canadian English Rating h-6. Block Unrated TV (Yes/ No) h-9. Sleep Timer(Off. H-Position (0~64) (ATV support only) g-2. CC (Off. 60Minutes. Service6) f-2. 30Minutes. Panoramic ) e. BR) b-4: Size(Small. Access Code Edit CONFIDENTIAL – DO NOT COPY Page 3-3 File No. Input Naming f. Channel Block h-3. DTV Rating h-8. CC1. Rating Enable (on/off) h-2. d. Source Type i-5. b. AUDIO： Audio Mode(Flat. Reset All Setting RGB Mode A. PICTURE： a. Jazz) a. Classic. Revision i-4. h. Pop.5 KHz 5 KHz 10KHz CONFIDENTIAL – DO NOT COPY Page 3-4 File No. g. Model Name: i-2. Setup Wizard j-2. f. i.i. Rock. Equalizer a-1 a-2 a-3 a-4 a-5 120Hz 500Hz 1. System Info i-1. e.Freq i-7. SG-0300 . Resolution i-6. Progressive j. V. Version i-3. System Reset j-1. c. Auto Adjust Backlight(0~100) Brightness(0~100) Contrast(0~100) Color Temperature H-Size(0~255) H-Position(0~100) V-Position(0~100) Fine Tune(0~31) B. Setup Wizard g-2. SG-0300 Panoramic) . Variable) h. PIP. PIP Position(TL. Lip Sync(0~5) i.. Stretch. Reset All Setting CONFIDENTIAL – DO NOT COPY Page 3-5 File No. 30Minutes.…) b-3. Off. Reset Audio Mode C. V. Francais) b. Digital Audio Out(PCM. Large) b-5. Wide (Zoom1. PIP b-1. Input Naming f. PIP Source(TV. Dolby Digital) f. Version f-3. BR) b-4. SRS TSHD (On/Off) d.b. Audio Source (Main or PIP) c. Full. 120Minutes) d.Freq f-7. Balance(-50~+50) c. Resolution f-6. 60Minutes. Analog Audio Out(Fixed. Progressive g. PIP Mode (Off. e. Revision f-4. System Reset g-1. 90Minutes. SETUP： a. Normal. Speakers(On/Off) g. SRS TruVolume (On/Off) e. Source Type f-5. Medium. Sleep Timer(Off. POP) b-2. Language(English. Espanol. Zoom2. Model Name: f-2. System Info f-1.Size(Small.…. Vivid. Reset Picture Mode B. Tint(-32~+32) f. Color(0~100) e. Variable) Page 3-6 File No. Off. d. Golf. Advanced Video g-1. f. Low. Classic. SG-0300 CONFIDENTIAL – DO NOT COPY . g. Dolby Digital) Speakers(On/Off) Analog Audio Out(Fixed. Football. e. Contrast(0~100) d. Green/Blue) g-3. Low. b. Smooth Motion g-7. Medium. Audio Mode(Flat. Color Temperature g-6. Brightness(0~100) c. 120Hz 500Hz 1. Game. Backlight(0~100) b. AUDIO： a. Movie. Sharpness(0~7) g. Color Enhancement(Off. Jazz) Equalizer b-1 b-2 b-3 b-4 b-5 c. Strong. Noise Reduction(Off. Pop. Advanced Adaptive Luma(Off. Rock.HDMI MODE A. Normal.5 KHz 5 KHz 10KHz Balance(-50~+50) SRS TSHD (On/Off) SRS TruVolume (On/Off) Digital Audio Out(PCM. Standard. Strong) g-2. PICTURE： Picture Mode(Custom. Film Mode (Auto/Off) g-8. Basketball. Medium. Green/Flesh. OPC) g-5. h. DCR. Baseball) a. Backlight Control (Off. Rich Color. Extend) g-4. Large) c. Reset All Setting CONFIDENTIAL – DO NOT COPY Page 3-7 File No.Espanol. Normal. Lip Sync(0~5) Reset Audio Mode C. j.i.Audio Source (Main or PIP) Sleep Timer(Off. 120Minutes) Wide (Zoom1.V-Position(0~32) f-3. Language(English .PIP Position(TL. System Info g-1.PIP Source(TV. V. d.…. g-7. Revision g-4. 60Minutes. 90Minutes. SG-0300 . b-5. PIP b-1.V-size(0~100) g. SETUP： a. Resolution g-6. Progressive System Reset h-1. Freq(HZ) h.Size(Small. e.H-size(0~100) f-4. f. Panoramic) Input Naming H/V Position f-1. POP) b-2. Francais) b. Zoom2. Full. Medium. Setup Wizard h-2. BR) b-4.…) b-3.PIP Mode (Off. 30Minutes. Stretch. Version g-3. Model Name: g-2. Source Type g-5.H-Position(0~64) f-2. PIP. Low. OPC) h-5. Smooth Motion h-7. Audio Mode(Flat. Color Temperature h-6.Video Sources： AV1、AV2、COMPONENT1、COMPONENT2 A. e. Picture Mode(Custom. AUDIO： a. Pop. Film Mode (Auto/Off) h-8. Advanced Video h-1. i. Sharpness(0~7) h. Green/Flesh. Medium. Backlight Control (Off. Advanced Adaptive Luma(Off. Movie. Off. Green/Blue) h-3. f. Rock. Classic.5 KHz b-4 c. Rich Color. Vivid. Strong) h-2.Baseball) b. Game. d. SG-0300 CONFIDENTIAL – DO NOT COPY . g. Standard. Basketball. Low. PICTURE： a. b. 5 KHz b-5 10KHz Balance(-50~+50) SRS TSHD (On/Off) SRS TruVolume (On/Off) Digital Audio Out(PCM. Extend) h-4. Tint(-32~+32) g. Golf. Football. Reset Picture Mode B. Contrast(0~100) e. Variable) Lip Sync(0~5) Page 3-8 File No. Normal. Brightness(0~100) d. h. Jazz) Equalizer b-1 120Hz b-2 500Hz b-3 1. Dolby Digital) Speakers(On/Off) Analog Audio Out(Fixed. Color Enhancement(Off. Backlight(0~100) c. DCR. Noise Reduction(Off. Medium. Strong. Color(0~100) f. H-size(0~100) f-4. Zoom2.US Movie Rating g-5. Medium. 30Minutes. 60Minutes.H-Position(0~64) f-2.US TV Rating g-4. d. Normal. DTV Rating CONFIDENTIAL – DO NOT COPY Page 3-9 File No.Audio Source (Main or PIP) c. Panoramic) Input Naming H/V Position f-1. f.…. PIP. Sleep Timer(Off.PIP Mode (Off. 90Minutes. Language(English. Canadian English Rating g-6.V-Position(0~32) f-3. SETUP： a.Espanol.…) b-3. POP) b-2.PIP Position(TL. Parental g-1.PIP Source(TV.Rating Enable(On/Off) g-2. Large) b-5. BR) b-4.Size(Small. Full. Francais) PIP b-1.V-size(0~100) g. Canadian French Rating g-7.Channel Block g-3. e. SG-0300 .j. Stretch. Reset Audio Mode C. 120Minutes) Wide (Zoom1. b. Freq h-7. Source Type h-5. Setup Wizard i-2. System Reset i-1.h. Model Name: h-2. V. System Info h-1. Revision h-4. Resolution h-6. SG-0300 . Reset All Setting CONFIDENTIAL – DO NOT COPY Page 3-10 File No. Version h-3. Progressive i. Check analog input route Yes END CONFIDENTIAL – DO NOT COPY Page 9-1 File No. Check video cable 2.Chapter 9 Trouble shooting MONITOR DISPLAY NOTHING (PC MODE) Start N0 1. Check VGA SOG rout if analog (SOG) Yes N0 Is backlight on? 1. Check P13 D-sub Input correct 5.Is Power Board ok? Yes Yes Panel has no data out? N0 It means data to LVDS 1. 2.Is JM1 & JM2 connecting OK? 2.Check J1 PIN15 2.Check +5V & +12V 3.Is panel ok? 4. Is the timing supported? 3. LED is lighted Is Power board output +5VSB &+12? Is J1 connector good? Is DC to DC OK? Is U1 (+5V) working ok? Yes N0 LED is lighting? It is in power saving 1. SG-0300 . 4. Check sync input 4. 3. Check Y2 is OK? Yes N0 LVDS output correct? 1. Check video 2. Check U11 :DV33&DV10&AV33&AV12 2. Check DVD player Yes N0 U11 input correct? 1.VIDEO ) IS NOT DISPLAY CORRECTLY Start N0 Input signal good? 1. Check LVDS signal Yes 1. Check VIDEO signal 2. Is panel working ok? END CONFIDENTIAL – DO NOT COPY Page 9-2 File No. Check U11 clock (27MHz) 3. COMPOSITE . Check signal between U11 (IF IN AV mode) Yes N0 U11 output correct? 1.(TV. SG-0300 . Check mini-LVDS cable 2. Check JM1 & JM2 Connect is good? 2. Check video 2. Check U11 2. Check U11 :DV33&DV10&AV33&AV12 Yes N0 LVDS output correct ? 1. Is JM1 & JM2 connected good? 2. Check LVDS cable Yes 1. Is panel working ok? Yes END CONFIDENTIAL – DO NOT COPY Page 9-3 File No. Check power 12V& 5V Yes N0 U11 input correct? 1. Check signal between P5 2. Check U11 Clock (27MHZ) 3. SG-0300 . Check signal between U14&P1 2.(COMPONENT) IS NOT DISPLAY CORRECTLY Start N0 Input signal good? 1. Check host’s setting Yes N0 P5 input correct? 1. Is panel working ok? Yes END CONFIDENTIAL – DO NOT COPY Page 9-4 File No. Check host’s setting Yes N0 U11 no data out ? 1. SG-0300 . Check video 2. Check between signals U11 3. Check U11 power 2. Check U11 clock 27MHZ Yes Yes 1.(HDMI) IS NOT DISPLAY CORRECTLY Start N0 Input signal good? 1. Is JM1 & JM2 connected good? 2. 8V Yes N0 U7 pin2 The voltage is about +3.08V END CONFIDENTIAL – DO NOT COPY Page 9-5 File No. Check U11 OPWRSB Pin Yes N0 U2.U5.25V N0 U6 pin2 The voltage is about +8V Yes N0 U10 pin7 Yes The voltage is about +1. J1 connection good.3.2 The voltage is +12V. Check power board Yes N0 U1 pin 5 6 7 8 The voltage is +5V while power switch on 1. Check power cable connection J1 Yes N0 J1PIN2.3V Yes N0 U4 pin2 The voltage is about +1. J5 connection good 2.TROUBLE OF DC-DC CONVERTER Start Yes N0 J1 PIN10.U45 pin2 The voltage is about +3.U3. SG-0300 .4/J5 PIN. +24V while power switch on 1.3V Yes N0 U9 pin2 The voltage is about +1.12 The voltage is 5VSB 1.1. Check power board 2.11. Check signal (U35 to P13) 3. Is compliant protocol? END CONFIDENTIAL – DO NOT COPY Page 9-6 File No. Check signal (U19 to P8) 4. SG-0300 . Check signal (U24 to P10) 5. Is compliant protocol? Yes N0 HDMIDDC OK? Yes Support DDC1/2B 1. Check signal (U28 to P11) 6.TROUBLE OF DDC READING Start Yes N0 Analog DDC OK? Support DDC1/2B 1. Check signal (U32 to P15) 7. HDMI cable ok? 2. VGA cable ok? 2. Check U35 Voltage 4. Check signal (U17 to P7) 3. (TV_SIDE. Check signal of Main Board 2. AUDIO) IS NOT DISPLAY CORRECTLY Start Yes N0 Input signal good? Yes 1. Check MT5392 audio out . Check Audio source 2.R604 & R605 Yes N0 Check amplifier OK? 1. SG-0300 . Yes END CONFIDENTIAL – DO NOT COPY Page 9-7 File No. Check amplifier (J11) Yes N0 Check signal correct? 1. Check 24V of U40. Check the player of source Yes N0 Input correct? 1.