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LG 50PC55-ZB Service Manual
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LG 50PC55-ZB Service Manual

Plasma tv
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See also: Owner's Manual
PLASMA TV

SERVICE MANUAL

CHASSIS : PD73A
MODEL : 50PC55
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
Internal Use Only
website:http://biz.LGservice.com
50PC55-ZB

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Summary of Contents for LG 50PC55-ZB

  • Page 1: Service Manual

    Internal Use Only website:http://biz.LGservice.com PLASMA TV SERVICE MANUAL CHASSIS : PD73A MODEL : 50PC55 50PC55-ZB CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • Page 2: Table Of Contents

    BLOCK DIAGRAM .....................29 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 Audio Input (3EA PC Audio, Component, AV L/R Input Copyright©2007 LG Electronics. Inc. All right reserved. - 5 - LGE Internal Use Only Only for training and service purposes...

  • Page 6: Adjustment Instructions

    But it works abnormally, “No CA module” words display on screen. <50” EAY32929001 only for 50PB56> (Fig. 1) Connection diagram of power adjustment for measuring 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 2. Measure and adjust after sticking the Color Analyzer(CA- 100+, CA210) to the side of the module. 3. Aging time : keep white pattern using inside pattern. Copyright©2007 LG Electronics. Inc. All right reserved. - 10 - LGE Internal Use Only...
  • Page 11 50PB65-ZA 2244 1977 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: Serial Number

    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 3.4V RL-ON 3.4V STB 5V Vs-ON 5V Det M5V-ON 3.4V STB 5V 3.4V-ON DESCRIPTION YH396-03V SMW250-013P SMW250-010P SMW250-012P YH396-04V YH396-10V Copyright©2007 LG Electronics. Inc. All right reserved. - 20 - LGE Internal Use Only Only for training and service purposes...
  • Page 21 3.4V RL-ON 3.4V STB 5V Vs-ON 5V Det M5V-ON 3.4V STB 5V 3.4V-ON DESCRIPTION YH396-03V SMW250-013P SMW250-010P SMW250-012P YH396-04V YH396-10V Copyright©2007 LG Electronics. Inc. All right reserved. - 21 - LGE Internal Use Only Only for training and service purposes...

  • Page 22: No Power

    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. - 22 - LGE Internal Use Only...
  • Page 23 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. - 23 - LGE Internal Use Only Only for training and service purposes...
  • Page 24 Check the PDP Module Reconnect the LVDS Is the LVDC cable normal? cable in P800 Is the IC700(FLI8548) Replace the VSC. Output normal? Copyright©2007 LG Electronics. Inc. All right reserved. - 24 - LGE Internal Use Only Only for training and service purposes...
  • Page 25 Replace the VSC B/D IC(IC700) operate? normal? 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. - 25 - LGE Internal Use Only Only for training and service purposes...
  • Page 26 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 27 (5) In case of an unusual display in Component, RGB mode Are the R,G,B input and H,V Check the input source Sync of the J1100 normal? Same as Block A (6) In case of an unusual display in HDMI mode Is the HDMI002(IC1004) Are Input voltage, IIC Communication Replace the IC.
  • Page 28 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. Is there no sound only Download Is the speaker Cable Check the Speaker...

  • Page 29: Block Diagram

    BLOCK DIAGRAM 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

    Supporter Assembly, 50PC5 SUPPORTER RIGHT ASSY FOR PHANTOM,LGEMA ASSY AJJ31592805 Supporter Assembly, 50PC5 SUPPORTER LEFT ASSY FOR PHANTOM,LGEMA ASSY ABA31592903 Bracket Assembly, DECO 50PC51-ZB,50PC55-ZB NON DECO BRACKET ASSY (Direct Grill) LGEMA 2ton ACQ31591305 Cover Assembly, 50PC5R-ZB NON 50” PCM SECD 0.5t FOR LGEMA local AGU31681116...

  • Page 32: Replacement Parts List

    0CK104BF56A C1005X7R104KET 100nF 10% 16V X7R C1306 0CK222CK56A 0603B222K500CT 2.2nF 10% 50V X7R C1134 0CK104BF56A C1005X7R104KET 100nF 10% 16V 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 C1365 0CK104CK56A 0603B104K500CT 100nF 10% 50V X7R C150 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 0603B104K160CT 100nF 10% 16V X7R C195 0CC220CK41A C1608C0G1H220JT 22pF 5% 50V C0G - C314 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 0CE226WF6DC MVK5.0TP16VC22M 22uF 20% 16V 30MA C602 0CK104CF56A 0603B104K160CT 100nF 10% 16V X7R C728 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 0CK104BF56A C1005X7R104KET 100nF 10% 16V X7R C786 0CK104CK56A 0603B104K500CT 100nF 10% 50V X7R C865 0CK104BF56A C1005X7R104KET 100nF 10% 16V X7R Copyright©2007 LG Electronics. Inc. All right reserved. - 36 - LGE Internal Use Only Only for training and service purposes...
  • Page 37 74HC14D 2TO6V 0.002mA SCHMITT TRI IC1102 0IPRP00009A ICL3232CBNZ 3VTO5.5V - SSOP R/TP IC1104 0ITO741570C TC74LCX157FT 2TO3.6V 0.01mA MULTI IC1105 0IMCRFA018A NC7SB3157P6X_NL 1.65TO5.5V 0.001m Copyright©2007 LG Electronics. Inc. All right reserved. - 37 - LGE Internal Use Only Only for training and service purposes...
  • Page 38 Inductor, MLI-201209-3R3K 3.3UH 10% 0V 30MA L1105 6210TCE001P Filter, HB-1S2012-121JT(H:1mm) 120OHM 2X1 L1209 0LC0233002A Inductor, FI-B2012-332KJT 3.3UH 10% 50V 50M Copyright©2007 LG Electronics. Inc. All right reserved. - 38 - LGE Internal Use Only Only for training and service purposes...
  • Page 39 MNR04M0APJ680 68OHM 5% 1/16W 4 SM Q608 0TR387500AA 2SC3875S(ALY) NPN 5V 60V 50V 150M AR809 EBC32260405 MNR04M0APJ680 68OHM 5% 1/16W 4 SM Copyright©2007 LG Electronics. Inc. All right reserved. - 39 - LGE Internal Use Only Only for training and service purposes...
  • Page 40 0RJ1000D677 MCR03EZPJ101 100OHM 5% 1/10W 1608 R1061 0RJ3302D677 MCR03EZPJ333 33KOHM 5% 1/10W 1608 R1165 0RJ1000D677 MCR03EZPJ101 100OHM 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 0RJ4701D677 MCR03EZPJ472 4.7KOHM 5% 1/10W 160 R1242 0RJ0752D677 MCR03EZPJ750 75OHM 5% 1/10W 1608 R1318 0RJ4701D677 MCR03EZPJ472 4.7KOHM 5% 1/10W 160 Copyright©2007 LG Electronics. Inc. All right reserved. - 41 - LGE Internal Use Only Only for training and service purposes...
  • Page 42 MCR03EZPJ272 2.7KOHM 5% 1/10W 160 R1407 0RJ0000D677 MCR03EZPJ000 0OHM 5% 1/10W 1608 R R150 0RJ0472D677 MCR03EZPJ470 47OHM 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 0RJ4701D677 MCR03EZPJ472 4.7KOHM 5% 1/10W 160 R1743 0RJ1000D477 MCR03EZPF101 100OHM 1% 1/10W 1608 R201 0RJ1000D677 MCR03EZPJ101 100OHM 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 MCR03EZPJ102 1KOHM 5% 1/10W 1608 R260 0RJ0222D677 MCR03EZPJ220 22OHM 5% 1/10W 1608 R524 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 0RJ1000C678 MCR01MZPJ101 100OHM 5% 1/16W 1005 R655 0RJ1002D677 MCR03EZPJ103 10KOHM 5% 1/10W 1608 R735 0RJ1002D677 MCR03EZPJ103 10KOHM 5% 1/10W 1608 Copyright©2007 LG Electronics. Inc. All right reserved. - 45 - LGE Internal Use Only Only for training and service purposes...
  • Page 46 MCR03EZPJ000 0OHM 5% 1/10W 1608 R R812 0RJ1002D677 MCR03EZPJ103 10KOHM 5% 1/10W 1608 R813 0RJ0222C678 MCR01MZPJ220 22OHM 5% 1/16W 1005 Copyright©2007 LG Electronics. Inc. All right reserved. - 46 - LGE Internal Use Only Only for training and service purposes...
  • Page 47 140-313B KPT-1115AM 1C1P 12VDC 0.05A HORIZ SW106 140-313B KPT-1115AM 1C1P 12VDC 0.05A HORIZ SW107 140-313B KPT-1115AM 1C1P 12VDC 0.05A HORIZ 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 IR/LED Copyright©2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 53 Sep., 2007 P/NO : MFL38562706 Printed in Korea...

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