LG 55LH95QD Service Manual

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Service manual (76 pages)

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LCD TV

SERVICE MANUAL

CHASSIS : LC91E

MODEL : 55LH95QD

CAUTION

BEFORE SERVICING THE CHASSIS,

READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

P/NO : MFL60021630 (0909-REV00)

North/Latin America

Europe/Africa

Asia/Oceania

55LH95QD-CB

AV1

AV2

COM1

COM2

RGB

WIRELESS

Internal Use Only

http://aic.lgservice.com

http://eic.lgservice.com

http://biz.lgservice.com

Printed in Korea

Table of Contents

Summary of Contents for LG 55LH95QD

Page 1: Service Manual
North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com LCD TV SERVICE MANUAL CHASSIS : LC91E MODEL : 55LH95QD 55LH95QD-CB CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. COM1 COM2 WIRELESS P/NO : MFL60021630 (0909-REV00) Printed in Korea...
Page 2: Table Of Contents
SPECIFICATION ..................6 ADJUSTMENT INSTRUCTION ..............9 MEDIA-BOX SETUP GUIDE ..............14 EXPLODED VIEW .................. 15 SVC. SHEET ....................Copyright © 2009 LG Electronics. Inc. All right reserved. - 2 - LGE Internal Use Only Only for training and service purposes...
Page 3: Product Safety
An other abnormality exists that must be corrected before the receiver is returned to the customer. Copyright © 2009 LG Electronics. Inc. All right reserved. - 3 - LGE Internal Use Only Only for training and service purposes...
Page 4: Servicing Precautions
Alternatively, obtain and wear a commercially available discharging wrist strap device, which should be removed to prevent potential shock reasons prior to applying power to the Copyright © 2009 LG Electronics. Inc. All right reserved. - 4 - LGE Internal Use Only...
Page 5 CAUTION: Maintain original spacing between the replaced component and adjacent components and the circuit board to prevent excessive component temperatures. Copyright © 2009 LG Electronics. Inc. All right reserved. - 5 - LGE Internal Use Only Only for training and service purposes...
Page 6: Specification
2) Humidity : ~ 80 % Storage Environment 1) Temp : -20 ~ 60 deg 2) Humidity : 0 ~ 85 % Copyright © 2009 LG Electronics. Inc. All right reserved. - 6 - LGE Internal Use Only Only for training and service purposes...
Page 7 33.75 60.00 HDTV 1080i 1920x1080 33.72 59.94 HDTV 1080i 1920x1080 56.250 HDTV 1080p 1920x1080 67.43/67.5 59.94/60 HDTV 1080p Copyright © 2009 LG Electronics. Inc. All right reserved. - 7 - LGE Internal Use Only Only for training and service purposes...
Page 8 HDCP 1360*768 47.72 59.8 84.75 WXGA HDCP 1280*1024 63.981 60.0 108.875 SXGA HDCP 1920*1080 67.5 148.5 WUXGA HDCP Copyright © 2009 LG Electronics. Inc. All right reserved. - 8 - LGE Internal Use Only Only for training and service purposes...
Page 9: Adjustment Instruction
- Adjustment : ADC Comp 1080p / RGB image in the black level area. -> use the Internal Pattern * External input Image Copyright © 2009 LG Electronics. Inc. All right reserved. - 9 - LGE Internal Use Only Only for training and service purposes...
Page 10 * HDMI5 / RGB can be downloaded by JIG and cable. RGB 1D HDMI1 04 F9 HDMI2 04 E9 HDMI3 04 D9 HDMI4 04 C9 Copyright © 2009 LG Electronics. Inc. All right reserved. - 10 - LGE Internal Use Only Only for training and service purposes...
Page 11: White Balance Adjustment
Signal Source B-Gain * If TV internal pattern is used, not needed Connection Diagram of Automatic Adjustment R-Cut G-Cut Copyright © 2009 LG Electronics. Inc. All right reserved. - 11 - LGE Internal Use Only Only for training and service purposes...
Page 12 MEDIUM 0.285 0.293 9300K 0.0000 check that the unit goes to Stand-by mode. WARM 0.313 0.329 6500K 0.0000 Copyright © 2009 LG Electronics. Inc. All right reserved. - 12 - LGE Internal Use Only Only for training and service purposes...
Page 13 By ‘IN-STOP’ to make shipping condition, it will be set to TV ‘19072’, Media-Box ‘19104’ automatically. Copyright © 2009 LG Electronics. Inc. All right reserved. - 13 - LGE Internal Use Only Only for training and service purposes...
Page 14: Media-Box Setup Guide
Media-Box is placed, wireless connection sensitivity improves. (a+b distance should be smaller than 10m.) Sofa Copyright © 2009 LG Electronics. Inc. All right reserved. - 14 - LGE Internal Use Only Only for training and service purposes...
Page 15: Exploded View
X-RADIATION, Shock, Fire, or other Hazards. Do not modify the original design without permission of manufacturer. 200N Copyright LG Electronics. Inc. All right reserved. - 15 - LGE Internal Use Only Only for training and service purposes...
Page 26 JUNO-BOX ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. IN/OUT Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 27 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. HDMI SW Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 28: Power Supply
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR AN SO YOUNG THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. POWER Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 29 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. TUNER Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 30 JUNO-BOX ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR DDR2 THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 31 JUNO-BOX ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. MSD3369GV Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 32 JUNO-BOX ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. MICOM Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 33 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS JUNO-BOX ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 34 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. LVDS RX Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 35 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. HDMI TX Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 48 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Title Sheet Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 49 2009.02.03 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR RFIC THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 50 W-TV Rx ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR Power THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 51 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR Power Supply1 THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 52 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR Power Supply2 THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 53 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR BBIC IF THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 54 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR BBIC Clock Recovery THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 55 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR BBIC Audio/Video Output THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 56 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR BBIC Control THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 57 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR BBIC Misc THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 58 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR BBIC Power/Ground THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 59 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR HTMI Tx THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 60 2009.03.21 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR uController THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Copyright © 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
Page 62: Trouble Shooting Guide
WIRELESS LH95 Trouble shooting Guide Trouble shooting: p2 - p6 About Wireless TV: p7 – p10 Block Diagram: p11 – p16 LCD TV Research Lab R&D 3 Dept / AJ Gr. LG ELECTRONICS INC.
Page 63 Trouble shooting WIRELESS LH95 WIRELESS MODEL Wireless Analog LVDS HDMI HDMI LVDS SIGNAL INPUT MAIN IC TX MODULE RX MODULE MAIN IC CONVERTER MODULE Digital LGD V4 LGE3159 DTC30LM36 + SIL9125 + SB9111 + LGE3369 + Component SIL9134 SB9120 + SB9121 + LGE7329 HDMI...
Page 64 Trouble shooting WIRELESS LH95 WIRELESS MODEL Wireless Analog LVDS HDMI HDMI LVDS SIGNAL INPUT MAIN IC TX MODULE RX MODULE MAIN IC CONVERTER MODULE Digital LGD V4 LGE3159 DTC30LM36 + SIL9125 + SB9111 + LGE3369 + Component SIL9134 SB9120 + SB9121 + LGE7329 HDMI...
Page 65 Trouble shooting WIRELESS LH95 WIRELESS MODEL Wireless Analog LVDS HDMI HDMI LVDS SIGNAL INPUT MAIN IC TX MODULE RX MODULE MAIN IC CONVERTER MODULE Digital LGD V4 LGE3159 DTC30LM36 + SIL9125 + SB9111 + LGE3369 + Component SIL9134 SB9120 + SB9121 + LGE7329 HDMI...
Page 66 Trouble shooting WIRELESS LH95 Pairing for SVC 1. Turn on the TV SET & Media-Box 2. Connect TV HDMI5 Jack & Media-Box rear [Service only] Jack with HDMI cable HDMI CABLE 3. Enter the [IN START(Media Box)] menu and go to sub-title [9.Wireless check] Enter menu and Push the left or right remote-controller button.
Page 67 About Wireless TV WIRELESS LH95 NORMAL MODEL Analog LVDS INPUT MAIN IC MODULE Digital MSTAR Component HDMI TV SET WIRELESS MODEL Wireless Analog LVDS HDMI HDMI LVDS SIGNAL INPUT MAIN IC TX MODULE RX MODULE MAIN IC CONVERTER MODULE Digital LGD V4 LGE3159 DTC30LM36 +...
Page 68 About Wireless TV WIRELESS LH95 TX Module HDMI Cable From Media-Box Main b/d SIL9125 SB9120 SB9110 [B/B] [RF] RX Module HDMI Cable SIL9134 To TV Main b/d SB9121 SB9111 PIC32MX [B/B] [RF] [MICOM] TV SET Media-Box TX module RX module...
Page 69 About Wireless TV WIRELESS LH95 Top view of RF IC (Antenna) SB9110 SB9111 Unused Unused HRP Channel LRP Channel = 60.48㎓ c(HRP)
Page 70 About Wireless TV WIRELESS LH95 Wireless TX module RX module LRP: Control data HRP: Video & Audio data Wireless TV is similar to the walkie-talkie. We must match the channel of Tx & Rx module. There are 4 HRP channel(A1~A4). We use only A2 channel and 3 LRP channel like this [60.32㎓], [60.48㎓],[60.64㎓].
Page 71 Block Diagram TV SET IC101 IC200,201 IC104 DDR2 NVRAM DDR2 IC800,801 24C512 KIA7427F (512Mb X 2) (512Mb X 2) DDR2 IC901 DDR2 (512Mb X 2) (512Mb X 2) 24C32 IC100 IC102 IC900 IC701 S-Flash (32Mb) LG5110 MODULE LGE7329A IC103 Local dimming Ursa NAND-Flash (512Mb)
Page 72 Block Diagram MEDIA-BOX(SIMPLE) To TV HDMI Splitter (PI3HDMI1210) Can Tuner Demodulator (TDFR-Z751D) (LG3900) FE_TS_SERIAL FE_VMAIN HDMI Transmitter wireless LVDS Receiver FE_SIF LVDS (SiI9134) (THC63LVD1024 / DTC30LM36) HDMI SPI_CK/CS/D0/D1 Serial Flash 31P Wafer : rear jack For Boot b’d & main b’d Rear jack b’d (P1200) AV1_CVBS_IN...
Page 73 Block Diagram MEDIA-BOX(VIDEO) +1.2V_DTMB +3.3V_DTMB +3.3VA_DTMB I2C_CH2(Demod 5.0V_TU repeater DTMB/DVB-C ANT/ Analog/D Demodulator I2C_CH2 CABLE [LG3900] Half-NIM TUNER I2C_CH1 I2C_CH2 I2C_CH4 Composite ANALOG VIDEO Video INPUT FE_VMAIN CEC_TX LCD/PDP D3.3V_2 D3.3V_2 D1.8V_1 D3.3V_3 D5.0V_1 AV1_CVBS_IN DIGITAL TV AV2_CVBS_IN PROCESSOR LVDS HDMI COMP1-Y/Pb/Pr HDMI...
Page 74 Block Diagram MEDIA-BOX(AUDIO) +1.2V_DTMB +3.3V_DTMB +3.3VA_DTMB I2C_CH2(Demod 5.0V_TU repeater DTMB/DVB-C ANT/ Analog/D Demodulator I2C_CH2 CABLE [LG3900] Half-NIM TUNER Composite I2C_CH1 I2C_CH2 I2C_CH4 Video S/PDIF ANALOG AUDIO INPUT D3.3V_2 D1.8V_1 D3.3V_3 D5.0V_1 FE_SIF LCD/PDP S/PDIF A/V Audio-1 DIGITAL TV A/V Audio-2 HDMI HDMI HDMI...
Page 75 Block Diagram TX MODULE ADCI_P/N D[35:0] ADCQ_P/N H/VSYNC PCLK_P/N DDC(2line) HDMI TMDS(8line) CABLE (54MHz) SiI9125 SB9120 SB9110 IDCK HDMI Network SLEEP MCLK/SCK/W XTAL XTAL Receiver Processor Transceiver (3.6864MHz) (28.322MHz) DACI_P/ SPDIFI DACQ_P/N RF Control Embedded I2C(2line) SPI Bus(4line) Control 3.3V HDMI_INT &...
Page 76 Block Diagram RX MODULE XTAL XTAL (27MHz) (27MHz) VCXO VCXO Video Video Audio Audio VCLK ACLK ADCI_P/N D[35:0] ADCQ_P/N H/VSYNC PCLK_P/N DDC(2line) TMDS(8line) HDMI (54MHz) CABLE SiI9134 SB9121 SB9111 IDCK HDMI Network SLEEP MCLK/SCK/W XTAL Transceiver Processor Receiver (3.6864MHz) I2S(4line) DACI_P/N SPDIFO Power...

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LG 55LH95QD Service Manual

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