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LG 42PQ1100 Service Manual
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LG 42PQ1100 Service Manual

LG 42PQ1100 Service Manual

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See also: Owner's Manual
PLASMA TV
SERVICE MANUAL
CHASSIS : PD92A
MODEL : 42PQ1100
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
P/NO : MFL58138612(0906-REV00)
North/Latin America
Europe/Africa
Asia/Oceania
42PQ1100-ZE
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 42PQ1100

  • 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 : PD92A MODEL : 42PQ1100 42PQ1100-ZE CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. P/NO : MFL58138612(0906-REV00) Printed in Korea...

  • Page 2: Table Of Contents

    CONTENTS ..........................2 SAFETY PRECAUTIONS ......................3 SPECIFICATION.........................4 ADJUSTMENT INSTRUCTION ....................7 BLOCK DIAGRAM ........................13 EXPLODED VIEW ........................16 SVC. SHEET ..........................Copyright © 2009 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 © 2009 LG Electronics. Inc. All right reserved. - 3 - LGE Internal Use Only Only for training and service purposes...

  • Page 4: Specification

    Kazekhstan, Latvia, Lthuania, Luxembourg, Morocco,Netherlands, Norway, EN55020 Poland, Portugal Romania, Russia, Sebia, Slovakia, Lovenia, Spain, EN55024 Sweden, Swtzerland, Turkey, UK, Ukraine Copyright © 2009 LG Electronics. Inc. All right reserved. - 4 - LGE Internal Use Only Only for training and service purposes...
  • Page 5 3) Temp. : -20 ~ 60deg 4) Humidity : 10 ~ 90% Input Voltage AC100-240V~, 50/60Hz Maker LG Copyright © 2009 LG Electronics. Inc. All right reserved. - 5 - LGE Internal Use Only Only for training and service purposes...
  • Page 6 AV 1EA, Component 1EA) Audio Out(1EA) SPDIF(1EA) USB(1EA) Divx, MP3, JPEG MP3, JPEG: 42/50PQ3000-ZA DIVX, MP3, JPEG: 42/50PQ6000-ZA Copyright © 2009 LG Electronics. Inc. All right reserved. - 6 - LGE Internal Use Only Only for training and service purposes...
  • Page 7 - 85IRE 100% Window White Pattern Medium 0.278 0.293 0.308 - APC : Vivid(Medium) 0.298 0.313 0.328 Warm 0.314 0.329 0.344 Copyright © 2009 LG Electronics. Inc. All right reserved. - 7 - LGE Internal Use Only Only for training and service purposes...

  • Page 8: Adjustment Instruction

    HDMI 1 : 31 HDMI 2 : 32 8 Read EDID Check sum HDMI 3 : 33 : 39 Copyright © 2009 LG Electronics. Inc. All right reserved. - 8 - LGE Internal Use Only Only for training and service purposes...
  • Page 9 ⓒ Model Name(Hex) * In case of 42/50PQ1000, 1100, HDMI 1 is ONLY applied. ⓓ Checksum: Changeable by total EDID data. Copyright © 2009 LG Electronics. Inc. All right reserved. - 9 - LGE Internal Use Only Only for training and service purposes...
  • Page 10 2) After turning VR951, voltage of D.M.M adjustment as same as Vs voltage which on label of panel right/top (deviation ; ±0.5V) Copyright © 2009 LG Electronics. Inc. All right reserved. - 10 - LGE Internal Use Only Only for training and service purposes...
  • Page 11 After aging start, keep the Power on (no suspension of power supply) and heat-run over 5 minutes 9.5. Auto Adjustment Map(RS232C) Copyright © 2009 LG Electronics. Inc. All right reserved. - 11 - LGE Internal Use Only Only for training and service purposes...
  • Page 12 6. When TV turn on, check the Updated version on Diagnostics automatically detecting. MENU. 3. Show the message “Copying files from memory” 4. Updating is staring. Copyright © 2009 LG Electronics. Inc. All right reserved. - 12 - LGE Internal Use Only Only for training and service purposes...

  • Page 13: Block Diagram

    BLOCK DIAGRAM TDMS 5V_HDMI_1, 2, 3 HDMI_CEC HDMI_I2C MUTE, AMP_RST SCL/SDA_SUB/AMP PCM_CD_ON PCM_ADD TS_Parallel PCM_DATA TS_Serial Copyright © 2009 LG Electronics. Inc. All right reserved. - 13 - LGE Internal Use Only Only for training and service purposes...
  • Page 14 POWER FLOW DIAGRAM L312 L326 L313 L324 Copyright © 2009 LG Electronics. Inc. All right reserved. - 14 - LGE Internal Use Only Only for training and service purposes...
  • Page 15 HW Power On Sequence (LGE2872A) Copyright © 2009 LG Electronics. Inc. All right reserved. - 15 - LGE Internal Use Only Only for training and service purposes...

  • Page 16: 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 17 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 18 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR MAIN_1 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 19 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR MAIN_2 THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. AIN_2 Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 20 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS 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 21 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR Module&Ctl 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 22 FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR Tuner 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 23 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR SCART THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. SCART Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 24 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR I n t e r f a c e 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 25 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR PCMCIA THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. CMCIA Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 26 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR HDMI THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. HDMI Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 27 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 ⓒ 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 28 ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR Power THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC. OWER Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...

  • Page 30: Pdp Tv Repair Process Index

    Remote control & Local switch checking First of all, Check whether there is SVC Bulletin in GCSC System for these model. Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 31 Power problem Power problem Section Section 2. Replace defective B/D ※Refer to the Module label for each voltage <SVC R/C & Pattern> Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 32 . HDMI Cable connection . Component Cable … Latest S/W update Replace from GCSC Main B/D (Firmware Management) Normal Close Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 33 Check Replace 1. Check Z-Sus Board Normal Normal Dark Picture Picture mode Module Picture? 2. Replace Board Picture? setting Close Close Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 34 ※ ’09 years new model apply chip tuner so, chip tuner is soldered on main PCB [ Chip Tuner: IC500(XC5000) ] Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 35 2. Replace Board Picture? 2.Replace Board Picture? Module on Y Drive B/D Close Close 1.Connector re-connection 2.Eliminate foreign material on FPC Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 36 Power B/D on Power B/D on Power B/D Close Check Power B/D Check Main B/D Replace Power B/D Replace Main B/D Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 37 Normal operation 2HOUR Off NO Signal Off “Off timer” Function off Move Don’t appear No Power problem Power Off History Section Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 38 Check Audio IC Explain customer that Replace Main B/D Cause is RF Signal’s problem (Case 1) Cause is Equipment’s problem (case 2) Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 39 Signal? Operation Output signal Connector solder (Key PCB + tool ) Close Close Repair/Replace Move Local switch B/D Power problem Section Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 40 Digital TV / HDMI Audio Problem Analog TV Component / AV / RGB Optical Audio USB Problem USB Problem No OSD All Input Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 41 Check IC109 (pin29) Output Replace IC109 Voltage Level (3.3V) Check L1103 Replace L1103 Voltage Level 5V Check IC1105 (pin2) Replace IC1105 Voltage Level 3.3V Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 42 Check P400 or P403 Replace Mstar(IC100) has #17(CKM) , #18(CKP) , problems #32(CKP) , #33(CKM) Check PDP Module Control board Refer to Module CAS Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 43 Check CVBS signal Replace Tuner(IC500) TU500 #16 Pin Replace Mstar(IC100) < CVBS waveform – sample > - Defend on the input signal. Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 44 Check signal Check the damage of JK701 on C712,C713,C714 And Replace Connector Replace Mstar(IC100) ※ Measured signals depend on the input signal. Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 45 Replace R747, R748, R749 R747, R748, R749 Check Signal Replace R753,R750,R751 R753,R750,R751 ※ Measured signals depend on the input signal. Replace Mstar(IC100) Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 46 R601,602,603,L604 (SCART1 AV), Replace Resistor L611 (SCART2 AV) ,R713 (Side AV), R707(S-Video) ※ Measured signals depend on the input signal. Replace Mstar(IC100) Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 47 → Power(#8) & I2C Signal (#5, #6) Check HDCP (IC102) Replace IC102 →Power(#8) & I2C Signal (#5, #6) Check Mstar(IC100) Replace Mstar(IC100) Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 48 :They must be High (3.3V) Check SCL,SDA Replace R1008,R1009 R1008,R1009 Check Connector Replace P1000 P1000 Check speaker for damage. Replace the Speaker Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 49 Re-download EDID data (IC901,902,903) or Replace IC → Power(#8) & I2C Signal (#5, #6) Follow procedure All source audio trouble shooting Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 50 Follow procedure All source audio < SIF waveform – sample > trouble shooting - Defend on the input signal. Replace Mstar IC (IC100) Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 51 R617 / R609, R654, / R652 (SCART, Rear AV) R776 / R780 (AV Side) Check IC100 signal C36,C37,C38,C39,C40, Replace Capacitor C41,C42,C43,C44,C45 Follow procedure All source audio trouble shooting Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 52 Replace Mstar IC100 Check Signal (JK1000 #3) Replace JK1000 < SPDIF waveform – sample > - Defend on the input signal. Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...
  • Page 53 - USB power could be disabled by inrushing current - In this case, remove the device and try to reboot the TV (AC power off/on) Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes...
  • Page 54 Replace Cable or open connectors. Check PDP Module Control board Refer to Module CAS It should satisfy the Pixel Clock on CAS. Copyright ⓒ 2009 LG Electronics. Inc. All right reserved. Only for training and service purposes LGE Internal Use Only...