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LG 42PT350R Service Manual
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LG 42PT350R Service Manual

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PLASMA TV
SERVICE MANUAL
CHASSIS : PP11K
MODEL : 42PT350R
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL67002503 (1102-REV00)
42PT351R
North/Latin America
Europe/Africa
Asia/Oceania
42PT350R-TD
42PT351R-TC
Internal Use Only
http://aic.lgservice.com
http://eic.lgservice.com
http://biz.lgservice.com
Printed in Korea

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Summary of Contents for LG 42PT350R

  • Page 1 Internal Use Only North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com PLASMA TV SERVICE MANUAL CHASSIS : PP11K MODEL : 42PT350R 42PT350R-TD 42PT351R 42PT351R-TC CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. Printed in Korea P/NO : MFL67002503 (1102-REV00)

  • Page 2: Table Of Contents

    CONTENTS ..........................2 SAFETY PRECAUTIONS ......................3 SPECIFICATION.........................4 ADJUSTMENT INSTRUCTION ....................6 BLOCK DIAGRAM ........................12 EXPLODED VIEW ........................13 CIRCUIT DIAGRAM ........................Copyright ©2011 LG Electronics Inc. All rights 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 ©2011 LG Electronics Inc. All rights reserved. - 3 - LGE Internal Use Only Only for training and service purposes...

  • Page 4: Specification

    4) Humidity : 10 % ~ 90 % Input Voltage AC 100 V ~ 240 V, 50 / 60 Hz Maker LG Copyright ©2011 LG Electronics Inc. All rights reserved. - 4 - LGE Internal Use Only Only for training and service purposes...
  • Page 5 L/R Input(PC 1EA, Component 2EA, Rear 1EA, Side 1EA) RS-232C (1EA) Remote control USB Input (1EA) SD DivX, MP3, JPEG, Copyright ©2011 LG Electronics Inc. All rights reserved. - 5 - LGE Internal Use Only Only for training and service purposes...

  • Page 6: Adjustment Instruction

    (2) Use voltage : 3.3V (5 pin) (3) SCL : 15 pin (4) SDA : 12 pin (5) Tact time : about 2min and 30seconds Copyright ©2011 LG Electronics Inc. All rights reserved. - 6 - LGE Internal Use Only Only for training and service purposes...
  • Page 7 ( Fig. 2) (6) Select SW file (XXXX.bin) you want, push the “OK” Key. (7) S/W download process is excuted automatically. Copyright ©2011 LG Electronics Inc. All rights reserved. - 7 - LGE Internal Use Only Only for training and service purposes...
  • Page 8 - Don’t Push “IN-STOP” key after PCB assembly / 2 (PHOTO, MUSIC, DivX) adjustment. * PP01A/B/C Tool option Model Tool option Area Option 42PT250R-TA Copyright ©2011 LG Electronics Inc. All rights reserved. - 8 - LGE Internal Use Only Only for training and service purposes...
  • Page 9 NO SIGNAL or White noise NO SIGNAL * Adjustment is done using internal ADC, so input signal is not necessary. Copyright ©2011 LG Electronics Inc. All rights reserved. - 9 - LGE Internal Use Only Only for training and service purposes...
  • Page 10 : CH 10 (PDP) lease adjust CA-210, CA-100+ by CS-1000 before measuring (3) Auto W/B adjustment instrument(only for Auto adjustment) (Fig. 4) Copyright ©2011 LG Electronics Inc. All rights reserved. - 10 - LGE Internal Use Only Only for training and service purposes...
  • Page 11 * Above optical characteristics are should be measured by following condition. Measured Mode Picture Mode Vivid Fresh Contrast Fresh Color Smart Power Saving Copyright ©2011 LG Electronics Inc. All rights reserved. - 11 - LGE Internal Use Only Only for training and service purposes...

  • Page 12: Block Diagram

    BLOCK DIAGRAM Copyright ©2011 LG Electronics Inc. All rights reserved. - 12 - LGE Internal Use Only Only for training and service purposes...

  • Page 13: Exploded View

    EXPLODED VIEW IMPORTANT SAFETY NOTICE Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in the Schematic Diagram and EXPLODED VIEW. It is essential that these special safety parts should be replaced with the same components as recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.
  • Page 14 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. INPUT INPUT Copyright © 2011 LG Electronics Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 15 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Key / Power / Power / LVDS / Option Copyright © 2011 LG Electronics Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 16 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Tuner/Amp/DDR Tuner / Amp / DDR Copyright © 2011 LG Electronics Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 17 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. Main Main Copyright © 2011 LG Electronics Inc. All rights reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 19 Repair Process A. Picture Problem Making PDP TV Symptom No Picture/Sound OK Revision First of all, Check whether all of cable between board was inserted properly or not. (Main B/D↔ Power B/D, Power B/D↔ Y-sus B/D,Y-Sus B/D ↔Z-Sus B/D,LVDS Cable,Speaker Cable,IR B/D Cable,,,) Check Module pattern Check Check...
  • Page 20 Repair Process A. Picture Problem Making PDP TV Symptom No Picture/No Sound Revision Check Module pattern Check Check Sound by using “TILT” key Normal Normal Close Sound LVDS Cable on SVC R/C Replace Move Main B/D No Picture/ Sound Ok Section Repair/Replace Check IR operation...
  • Page 21 Repair Process A. Picture Problem Making PDP TV Symptom Mal-discharge/Noise/dark picture Revision Check Picture problem Check CTRL ROM Ver. Type Replace Replace Normal Normal Control board Module type Picture? Picture? Rom Upgrade Mal-discharge Close Close Check Check voltage Scan Normal Normal 1.Check Control B/D Normal...
  • Page 22 Repair Process A. Picture Problem Making PDP TV Symptom Picture broken/Freezing Revision . By using signal level meter Check RF Signal level - Signal strength (Normal : over 50%) - Signal Quality (Normal: over 50%) Check whether other equipments have problem or not. Normal (By connecting RF Cable at other equipment) Signal?
  • Page 23 Repair Process A. Picture Problem Making PDP TV Symptom Vertical bar/ Horizontal Bar Revision Check defect type Check Module pattern Regular Replace Normal Vertical by using “TILT” key Module Pattern? Line / Bar on SVC R/C 1.Check CTRL B/D ※CTRL B/D: Control board Vertical 2.Replace Board Line/Bar...
  • Page 24 Repair Process B. Power Problem Making PDP TV Symptom No Power (Not turn on) Revision DC Power on Check Check Repair/Replace Power LED by pressing Power Key Normal Normal IR B/D Power LED R/C IR Operation On Remote control . Stand-By: Red .
  • Page 25 Repair Process B. Power Problem Making PDP TV Symptom Turn off (Instant, under watching) Revision ※ To check Power B/D Protection 1. Check Y-Sus/ Z-Sus Board Instant Turn on after pull out connector Power LED (especially Short or Open) between Power B/D & Y-Sus Turn off Green? 2.
  • Page 26 Repair Process C. Sound Problem Making PDP TV Symptom No sound/ Sound distortion Revision 1.No sound( If HDMI Input only have no sound, upload EDID data) Close Check Check Speaker Apply Normal Normal Normal “Speaker ON/Off” setting jack connection SVC Bulletin Sound? Sound? Sound?
  • Page 27 Repair Process D. General Function Problem Making PDP TV Symptom Remote control Revision 1. Remote control (R/C) operating error Replace Main B/D Check & Repair Check R/C itself Normal Normal Check B+ 5V Normal Check IR Normal Cable connection operating? operating? Voltage? Signal?
  • Page 28 Repair Process-Reference data A. Picture Problem Symptom Making PDP TV Item Check Module pattern by Tilt key Revision Tilt Key You can see 20 types patterns by using TILT Key on SVC Remote controller (except Old model) < CHECK Item > 1.
  • Page 29 Repair Process-Reference data A. Picture Problem Making PDP TV Symptom Control Board Checking Method(42G2/50G2) Revision ▣ Checking Method ④ Check Crystal(X101) ① Check input voltage(5V of P101) on Control B/D ② Check LED On 3.3 V ③ If LED light doesn’t appear, check Crystal X101 output 1.8 V ④...
  • Page 30 Repair Process-Reference data A. Picture Problem Making PDP TV Symptom PDP Module Rom Ver. Checking method Revision ▣ Check by using Rom Label on control board Rom ver. Label ▣ Check by using SVC Remocon Press “In-start” →Press” 0000” ※Refer to the Module Rom upgrade manual →...
  • Page 31 Repair Process-Reference data A. Picture Problem Making PDP TV Symptom Defect type cause by PDP Module Revision First of all, Check whether all of cable between board was inserted properly or not. Next, Check whether there is foreign material on connector. Symptom picture defects description To action...
  • Page 32 Repair Process-Reference data A. Picture Problem Making PDP TV Symptom Connector Type on PDP Module Revision COF Type TCP Type FPC Type 96 Out Put 192 Out Put 1. Check foreign & Connection status TCP (Tape Carrier Package) is film Connector to connect between 2.
  • Page 33 Repair Process-Reference data B. Power Problem Making PDP TV Symptom Check voltage on Power board Revision Pin Map Checking Order Checking Order Power B/D↔Main B/D (P813) (P1100) Checking Spec Remark Point P814 STBY 5V AC DET High(3.3V~5V) Error_DET Error_DET RL_ON High(3.3V~5V) M5_ON High(3.3V~5V)

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42pt350r-td42pt351r42pt351r-tc42pt350r-ta