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LG 42PC35 Service Manual
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LG 42PC35 Service Manual

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PLASMA TV
SERVICE MANUAL
CHASSIS : PD73A
MODEL : 42PC35
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
Internal Use Only
website:http://biz.LGservice.com
42PC35-ZC

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Summary of Contents for LG 42PC35

  • Page 1 Internal Use Only website:http://biz.LGservice.com PLASMA TV SERVICE MANUAL CHASSIS : PD73A MODEL : 42PC35 42PC35-ZC CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • Page 2: Table Of Contents

    BLOCK DIAGRAM .....................28 EXPLODED VIEW ....................30 EXPLODED VIEW PARTS LIST ................31 REPLACEMENT PARTS LIST................32 SCHEMATIC DIAGRAM..................PRINTED CIRCUIT DIAGRAM ................Copyright©2007 LG Electronics. Inc. All right reserved. - 2 - LGE Internal Use Only Only for training and service purposes...

  • Page 3: Safety Precautions

    An other abnormality exists that must be corrected before the receiver is returned to the customer. Copyright©2007 LG Electronics. Inc. All right reserved. - 3 - LGE Internal Use Only Only for training and service purposes...

  • Page 4: Specifications

    : 0~40deg 2)Humidity : 20~80% LGE SPEC. Storage Environment 3)Temp. : -20~60deg 4)Humidity : 10~90% Input Voltage 100-240V~, 50/60Hz Maker LG Copyright©2007 LG Electronics. Inc. All right reserved. - 4 - LGE Internal Use Only Only for training and service purposes...
  • Page 5 Component Input (1EA) Y/Cb/Cr, Y/Pb/Pr RGB Input(1EA) RGB-PC HDMI Input(2EA) HDMI-DTV & SOUND L/R Input Audio Input (3EA) PC Audio, Component, AV Copyright©2007 LG Electronics. Inc. All right reserved. - 5 - LGE Internal Use Only Only for training and service purposes...

  • Page 6: Adjustment Instructions

    1) If PCMCIA CARD works normally, normal signals display on screen. But it works abnormally, “No CA module” words display on screen. Copyright©2007 LG Electronics. Inc. All right reserved. - 6 - LGE Internal Use Only Only for training and service purposes...
  • Page 7 3) Set up S/W option. Repeat Number : 5 Device Address : A0 PageByte : 8 4) Power on the Set. Copyright©2007 LG Electronics. Inc. All right reserved. - 7 - LGE Internal Use Only Only for training and service purposes...
  • Page 8 => Detail EDID Options are below([1], [2], [3],[4], [5]) * Please refer HDMI1 => Detail EDID Options are below([1], [2], [3],[4], [5]) Copyright©2007 LG Electronics. Inc. All right reserved. - 8 - LGE Internal Use Only Only for training and service purposes...
  • Page 9 2) MSPG-925FS Pattern Generator (Which has Video Signal: 7 Color Bar Pattern shown in Fig. 4). - Model: 215 / Pattern: 65 Copyright©2007 LG Electronics. Inc. All right reserved. - 9 - LGE Internal Use Only Only for training and service purposes...

  • Page 10: Baud : 115200Bps, Rs232 Host : Pc, Echo : None

    2) Keep white pattern using inside pattern. (When R/G/B GAIN are all 80, it is the FULL DYNAMIC Range of Module) Copyright©2007 LG Electronics. Inc. All right reserved. - 10 - LGE Internal Use Only Only for training and service purposes...
  • Page 11 (Fig. 8) Default on OSD 15-2. Push the menu button in DTV mode. (1) Select the STATION-> Diagno stics -> To set. Copyright©2007 LG Electronics. Inc. All right reserved. - 11 - LGE Internal Use Only Only for training and service purposes...
  • Page 12 1. After Click the ‘NEXT’ icon, Installation is finished. 2) Connect RS232 cable and turn on the power. (Use the general RS-232C Serial Cable) Copyright©2007 LG Electronics. Inc. All right reserved. - 12 - LGE Internal Use Only Only for training and service purposes...
  • Page 13 After Change a mode, you can see ‘GPROBE MODE’ 7) Wait the final message. 1. After DOWNLOAD, Turn off the TV after download -> Turn on. Copyright©2007 LG Electronics. Inc. All right reserved. - 13 - LGE Internal Use Only...
  • Page 14 (1) Installation of the GProbe 5 1) Extract to folder GProbe5.0.0.15_S0006_EXE_09A.ZIP. CLICK 2) Install GProbe5.0.0.15.EXE - 1. CLICK 4) Install GProbe5.0.0.15.EXE - 3. Copyright©2007 LG Electronics. Inc. All right reserved. - 14 - LGE Internal Use Only Only for training and service purposes...
  • Page 15 1) Prepare a ‘*.hex‘, ‘isp_16_ext.hex‘, ‘*.txt‘ in the same folder. 5) Open the batch file - 1. 1. Click the ‘Commands’. CLICK * In the TEXT FILE Copyright©2007 LG Electronics. Inc. All right reserved. - 15 - LGE Internal Use Only Only for training and service purposes...
  • Page 16 2. Because change the ‘Tool Option’, the White Balance Value is reset. 8) Open the batch file - 3. 1. Choose the text file. Copyright©2007 LG Electronics. Inc. All right reserved. - 16 - LGE Internal Use Only Only for training and service purposes...
  • Page 17 1) Extract to folder lgterm.zip. 6) Insert ‘dn’ and Enter. (2) Download biz file using LG Term 1) Prepare the ‘ *.biz ‘ that you want to download on ST. 2) Connect TV set and PC by using RS232 cable, Turn on the TV.
  • Page 18 4. Enter ‘115200bps’ on the ‘Baud Rate’. 5. Enter the ‘Cortez’ on the ‘Download. 9) Download takes 60sec ~ 120sec. Copyright©2007 LG Electronics. Inc. All right reserved. - 18 - LGE Internal Use Only Only for training and service purposes...

  • Page 19: Trouble Shooting Guide

    11. Check the Y B/D 9. Check the Power Manufacture’s model Module output circuit Module output circuit Board Output high passage tension circuit Copyright©2007 LG Electronics. Inc. All right reserved. - 19 - LGE Internal Use Only Only for training and service purposes...
  • Page 20 STB 5V Vs-ON 5V Det M5V-ON 3.4V STB 5V 3.4V-ON Wafer P/N SMW250-013P SMW250-13P SMW250-10P SMW250-12P YH396-08V YH396-09V YH396-04V SMW250-08P Copyright©2007 LG Electronics. Inc. All right reserved. - 20 - LGE Internal Use Only Only for training and service purposes...
  • Page 21 After removing the cables, connect them to the Power Board(except the SC101 connection cable), and change the AC voltage marking to manual. When ST-BY 5V does not operate, replace the Power Board. Copyright©2007 LG Electronics. Inc. All right reserved. - 21 - LGE Internal Use Only...
  • Page 22 After a COF crisis for each board, check the normal operation. For normal operation, normal ? corresponding COF failure means the module should be relaced. Copyright©2007 LG Electronics. Inc. All right reserved. - 22 - LGE Internal Use Only Only for training and service purposes...
  • Page 23 Check the PDP Module Is the LVDC cable Reconnect the LVDS cable in P800 normal? Is the IC700(FLI8548) Replace the VSC. Output normal? Copyright©2007 LG Electronics. Inc. All right reserved. - 23 - LGE Internal Use Only Only for training and service purposes...
  • Page 24 Replace the VSC B/D normal? IC(IC700) operate? Replace the FIL8548 IC(IC700) Is the Ctrl Board of Replace the Ctrl B/D. Module normal? Copyright©2007 LG Electronics. Inc. All right reserved. - 24 - LGE Internal Use Only Only for training and service purposes...
  • Page 25 5-2. In case there is no display on the screen in specific modes (1) Symptom 1) There is no screen display from a specific input mode (RF, AV, Component, RGB, DVI). (2) Procedure check 1) Check the all input modes have normal display. 2) Check the video(main)/ data(sub), video(main)/ video(sub) have normal displays from the PIP mode or DW mode(re-check it/ swap).
  • Page 26 (8) In case of an unusual display in SCART2 mode Is the Video input of the Check the input source A/V Jack(J1201) normal? Same as Block A Copyright©2007 LG Electronics. Inc. All right reserved. - 26 - LGE Internal Use Only Only for training and service purposes...
  • Page 27 6. In case of no sound (1) Symptom 1) LED is Green. 2) Screen display appears but there is no sound. (2) Procedure check All input(modes) have Set speaker on in the Is the speaker on? no sound? menu. Download Is there no sound only Is the speaker Cable Check the Speaker...

  • Page 28: Block Diagram

    BLOCK DIAGRAM Copyright©2007 LG Electronics. Inc. All right reserved. - 28 - LGE Internal Use Only Only for training and service purposes...
  • Page 29 MEMO Copyright©2007 LG Electronics. Inc. All right reserved. - 29 - LGE Internal Use Only Only for training and service purposes...

  • Page 30: Exploded View

    EXPLODED VIEW Copyright©2007 LG Electronics. Inc. All right reserved. - 30 - LGE Internal Use Only Only for training and service purposes...

  • Page 31: Exploded View Parts List

    Plate Assembly, REAR AV PLATE COVER ASSEMBLE 42PC35 & 50PC35 EU EUROPASS3 BASIC PRESS EBR39660222 Hand Insert PCB Assembly, Main MAIN M.I PD73A 42PC35-ZC KEKLLMP Hand Insert PCB Assembly MAIN for MA_CKD 68719SML76A Hand Insert PCB Assembly, Sub SUB M.I PD61A 42PC3D-EC . - EBR40151401 PCB Assembly, Sub SUB T.T PD73A 42PC35-ZC KEKLLMP SUB IR PCB Package Assembly for MA CKD...

  • Page 32: Replacement Parts List

    0CK225DFK4A C2012Y5V1C225MT 2.2uF 20% 16V Y5V C1309 0CE475WK6DC MVK5.0TP50VC4.7M 4.7uF 20% 50V 19 C1136 0CK104CK56A 0603B104K500CT 100nF 10% 50V X7R Copyright©2007 LG Electronics. Inc. All right reserved. - 32 - LGE Internal Use Only Only for training and service purposes...
  • Page 33 0CK104CF56A 0603B104K160CT 100nF 10% 16V X7R C1368 0CK104CK56A 0603B104K500CT 100nF 10% 50V X7R C153 0CK104CF56A 0603B104K160CT 100nF 10% 16V X7R Copyright©2007 LG Electronics. Inc. All right reserved. - 33 - LGE Internal Use Only Only for training and service purposes...
  • Page 34 C414 0CE106WFKDC MVK4.0TP16VC10M 10uF 20% 16V 16MA C198 0CK475CC94A C1608Y5V0J475ZT 4.7uF -20TO+80% 6 C415 0CK104CF56A 0603B104K160CT 100nF 10% 16V X7R Copyright©2007 LG Electronics. Inc. All right reserved. - 34 - LGE Internal Use Only Only for training and service purposes...
  • Page 35 0CK104CK56A 0603B104K500CT 100nF 10% 50V X7R C626 0CK104CF56A 0603B104K160CT 100nF 10% 16V X7R C746 0CK104CK56A 0603B104K500CT 100nF 10% 50V X7R Copyright©2007 LG Electronics. Inc. All right reserved. - 35 - LGE Internal Use Only Only for training and service purposes...
  • Page 36 0CK104CK56A 0603B104K500CT 100nF 10% 50V X7R C802 0CK104CK56A 0603B104K500CT 100nF 10% 50V X7R C915 0CE107WF6DC MVK6.3TP16VC100M 100uF 20% 16V 11 Copyright©2007 LG Electronics. Inc. All right reserved. - 36 - LGE Internal Use Only Only for training and service purposes...
  • Page 37 KIA78R33F 4TO10V 3.3V 8W DPAK R/T ZD1108 EAH33945901 CDS3C30GTH 30V 50V 120V 1.9A 1W S IC505 0IPMGKE031A KIA78R33F 4TO10V 3.3V 8W DPAK R/T Copyright©2007 LG Electronics. Inc. All right reserved. - 37 - LGE Internal Use Only Only for training and service purposes...
  • Page 38 2SC3875S(ALY) NPN 5V 60V 50V 150M L400 6210TCE001G Filter, HH-1M3216-501JT 500OHM 3.2X1.6X1. Q1305 0TR102009AM KRA102S PNP -30V 0V -50V -0.1A -0 Copyright©2007 LG Electronics. Inc. All right reserved. - 38 - LGE Internal Use Only Only for training and service purposes...
  • Page 39 MCR03EZPJ000 0OHM 5% 1/10W 1608 R AR308 0RJ0332C687 RCA86TRJ33R0 33OHM 5% 1/16W 4 SMD R105 0RJ1100D677 MCR03EZPJ111 110OHM 5% 1/10W 1608 Copyright©2007 LG Electronics. Inc. All right reserved. - 39 - LGE Internal Use Only Only for training and service purposes...
  • Page 40 0RJ0752D677 MCR03EZPJ750 75OHM 5% 1/10W 1608 R1137 0RJ1000D677 MCR03EZPJ101 100OHM 5% 1/10W 1608 R1231 0RJ1002D677 MCR03EZPJ103 10KOHM 5% 1/10W 1608 Copyright©2007 LG Electronics. Inc. All right reserved. - 40 - LGE Internal Use Only Only for training and service purposes...
  • Page 41 0RJ0472D677 MCR03EZPJ470 47OHM 5% 1/10W 1608 R131 0RJ0472D677 MCR03EZPJ470 47OHM 5% 1/10W 1608 R140 0RJ0472D677 MCR03EZPJ470 47OHM 5% 1/10W 1608 Copyright©2007 LG Electronics. Inc. All right reserved. - 41 - LGE Internal Use Only Only for training and service purposes...
  • Page 42 0RJ0222D677 MCR03EZPJ220 22OHM 5% 1/10W 1608 R152 0RJ0472D677 MCR03EZPJ470 47OHM 5% 1/10W 1608 R1747 0RJ1000D677 MCR03EZPJ101 100OHM 5% 1/10W 1608 Copyright©2007 LG Electronics. Inc. All right reserved. - 42 - LGE Internal Use Only Only for training and service purposes...
  • Page 43 0RJ1002D677 MCR03EZPJ103 10KOHM 5% 1/10W 1608 R204 0RJ1000D677 MCR03EZPJ101 100OHM 5% 1/10W 1608 R303 0RJ1002D677 MCR03EZPJ103 10KOHM 5% 1/10W 1608 Copyright©2007 LG Electronics. Inc. All right reserved. - 43 - LGE Internal Use Only Only for training and service purposes...
  • Page 44 MCR10EZHJ000 0OHM 5% 1/8W 2012 R/ R548 0RJ1000D677 MCR03EZPJ101 100OHM 5% 1/10W 1608 R672 0RJ0000D677 MCR03EZPJ000 0OHM 5% 1/10W 1608 R Copyright©2007 LG Electronics. Inc. All right reserved. - 44 - LGE Internal Use Only Only for training and service purposes...
  • Page 45 0RJ0682C678 MCR01MZPJ680 68OHM 5% 1/16W 1005 R757 0RJ1000C678 MCR01MZPJ101 100OHM 5% 1/16W 1005 R881 0RJ0682C678 MCR01MZPJ680 68OHM 5% 1/16W 1005 Copyright©2007 LG Electronics. Inc. All right reserved. - 45 - LGE Internal Use Only Only for training and service purposes...
  • Page 46 Socket, PCI 10074998-118MCALF 68P 1.27MM J1102 6630G70017A A02-0915-101 D-SUB 9P 2.77MM STRA CN300 6630VE01269 Wafer, 91932-31169LF 68P 1.00MM 1R STRAI Copyright©2007 LG Electronics. Inc. All right reserved. - 46 - LGE Internal Use Only Only for training and service purposes...
  • Page 47 Plate, PRESS SBHG T1.2 SUPPORT UPSET FAB30006116 Screw, Machine FAB30006116 FH + 4MM 14MM MSWR FAB30021701 Screw, Machine 1SZZVMR001A RING WALL 5MM 25MM Copyright©2007 LG Electronics. Inc. All right reserved. - 47 - LGE Internal Use Only Only for training and service purposes...
  • Page 48 Copyright©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 49 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. Copyright©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 50 C1257 R1604 C1134 NC7SB3157P6X 10uF JP1114 +3.3V_SWITCH 0.1uF R1600 Q1205 UART0_TX PDP : 100p 2SC3052 R1166 3.3K R1601 R1602 6.8K 2.2K UART1_TX COMM_UART_RX Copyright©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 51 2SC3875S READY C623 C624 TUNER_RESET FE_RESET AM_AUDIO to MSP DTV_TU_I2C DTV_TU_I2C 47pF 47pF C639 C635 100uF 4700pF R648 C637 4700pF GND_TU GND_TU GND_TU Copyright©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 52 PRINTED CIRCUIT BOARD MAIN (TOP) MAIN (BOTTOM) CONTROL B/D SIDE A/V (BOTTOM) SIDE A/V (TOP) IR/LED Copyright©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 53 Oct., 2007 P/NO : MFL38562712 Printed in Korea...

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