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LG 32LB9D Service Manual
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LG 32LB9D Service Manual

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LCD TV

SERVICE MANUAL

CHASSIS : LB73B
MODEL : 32LB9D
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
website:http://biz.LGservice.com
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  • Page 1: Service Manual

    Internal Use Only website:http://biz.LGservice.com LCD TV SERVICE MANUAL CHASSIS : LB73B MODEL : 32LB9D 32LB9D-AD CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • Page 2: Table Of Contents

    ADJUSTMENT INSTRUCTION ..............9 TROUBLE SHOOTING ................14 BLOCK DIAGRAM...................27 EXPLODED VIEW .................. 32 REPLACEMENT PARTS LIST ............... 34 SVC. SHEET ....................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: 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 © 2007 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 © 2007 LG Electronics. Inc. All right reserved. - 5 - LGE Internal Use Only Only for training and service purposes...

  • Page 6: Specification

    Temperature : 0 ~ 40 deg Humidity : 85% Storage Environment Temperature : -20 ~ 60 deg Humidity : 85% Copyright © 2007 LG Electronics. Inc. All right reserved. - 6 - LGE Internal Use Only Only for training and service purposes...
  • Page 7 1920*1080 33.716/33.750 29.97/30.00 74.1762/74.25 HDTV 1080P 1920*1080 56.25 50.00 148.50 HDTV 1080P 1920*1080 67.43/67.50 59.94/60.00 148.50 HDTV 1080P Copyright © 2007 LG Electronics. Inc. All right reserved. - 7 - LGE Internal Use Only Only for training and service purposes...
  • Page 8 1920*1080 33.716/33.750 29.97/30.00 74.1762/74.25 HDTV 1080P 1920*1080 56.25 50.00 148.50 HDTV 1080P 1920*1080 67.43/67.50 59.94/60.00 148.50 HDTV 1080P Copyright © 2007 LG Electronics. Inc. All right reserved. - 8 - LGE Internal Use Only Only for training and service purposes...

  • Page 9: Adjustment Instruction

    70 25 80 C4 8E 21 00 00 9E 00 00 00 00 00 00 00 48 3) D-Sub cable 4) Jig for HDMI Cable connection Copyright © 2007 LG Electronics. Inc. All right reserved. - 9 - LGE Internal Use Only...
  • Page 10 The error message is as 4-3/ (1)/ 5) After adjustment is complete, exit the adjustment mode by pressing the ADJ KEY.1 Copyright © 2007 LG Electronics. Inc. All right reserved. - 10 - LGE Internal Use Only Only for training and service purposes...

  • Page 11: Adjustment Of White Balance

    2) Set the Baud Rate of RS-232C to 115200. It is set to 115200 as default. 3) Connect the RS-232C Cable to the set. Copyright © 2007 LG Electronics. Inc. All right reserved. - 11 - LGE Internal Use Only...
  • Page 12 ‘AV-PAL Configuration Fail’ WARM CA-210 0.313 ± 0.002 0.329 ± 0.002 is displayed. Copyright © 2007 LG Electronics. Inc. All right reserved. - 12 - LGE Internal Use Only Only for training and service purposes...
  • Page 13 NTSC Configuration Success’ is displayed. If the adjustment has failed, a message saying ‘AV-NTSC Configuration Fail’ is displayed. Copyright © 2007 LG Electronics. Inc. All right reserved. - 13 - LGE Internal Use Only Only for training and service purposes...

  • Page 14: Trouble Shooting

    TROUBLESHOOTING 1. VIDEO (1) NO OSD(FHD) Cable Air Copyright © 2007 LG Electronics. Inc. All right reserved. - 14 - LGE Internal Use Only Only for training and service purposes...
  • Page 15 Copyright © 2007 LG Electronics. Inc. All right reserved. - 15 - LGE Internal Use Only Only for training and service purposes...
  • Page 16 Check A nten na Cable Check Tu ner 5V, Video o ut Check CVBS Video Path Check X260 i npu ts M_TU_CVBS(C2117) Copyright © 2007 LG Electronics. Inc. All right reserved. - 16 - LGE Internal Use Only Only for training and service purposes...
  • Page 17 Valid, Error, Data 3._ Check X 260 Input ( CLK, SOP, Valid, Error, Data) TPCLK TPSOP TPVALID nTPERR TPDATA[7:0] Copyright © 2007 LG Electronics. Inc. All right reserved. - 17 - LGE Internal Use Only Only for training and service purposes...
  • Page 18 MST3361_VS(#T5) , Clock ( #P3) , Data (30Bit) , DE(#U6) 6 : _Check X 260 (IC101) Inputs _Signal shape is sa me (above) Copyright © 2007 LG Electronics. Inc. All right reserved. - 18 - LGE Internal Use Only Only for training and service purposes...
  • Page 19 MST3361_VS(#T5) , Clock ( #P3) , _Sign al sh ape is same (abo ve) Data (30Bit) , DE(#U6) Copyright © 2007 LG Electronics. Inc. All right reserved. - 19 - LGE Internal Use Only Only for training and service purposes...
  • Page 20 Replace SI4800( Q315) Replace SC2621(IC304) 1.9V Normal? Check between FB1714 and Replace SI4800( Q300,Q301) Replace SC2621(IC304) C345 1.2V Normal? Copyright © 2007 LG Electronics. Inc. All right reserved. - 20 - LGE Internal Use Only Only for training and service purposes...

  • Page 21: Digital Audio Out

    Check M SP4450K (IC508) Output P502(Left), P501(Right) R5062 (Left), R5063 (Right) Check Spe aker Check MNT Output Jack (J704) Copyright © 2007 LG Electronics. Inc. All right reserved. - 21 - LGE Internal Use Only Only for training and service purposes...
  • Page 22 Check X260 ( IC101) Intputs R175(SCLK), R176(LRCLK), R177(DATA) Fol lo w the pr ocedur e of COMMON SOUND OUT Copyright © 2007 LG Electronics. Inc. All right reserved. - 22 - LGE Internal Use Only Only for training and service purposes...
  • Page 23 Check Tuner (TU600) 5V (3,5,9,17 pin), IF_N(15 pin), IF_P(14pin) Check X260 (IC101) Follow the procedure of ì COMMON SOUND OUTî Copyright © 2007 LG Electronics. Inc. All right reserved. - 23 - LGE Internal Use Only Only for training and service purposes...
  • Page 24 X-tal Input (71,72pin) Check X260 (IC101) Inputs R175(SCLK), R176(LRCLK), R177(DATA) Follow the procedure of ì COMMON SOUND OUTî Copyright © 2007 LG Electronics. Inc. All right reserved. - 24 - LGE Internal Use Only Only for training and service purposes...
  • Page 25 Check X260 ( IC101) Inpu ts SCLK(R175), LRCLK(R176), DATA(R177) Fol lo w the pr ocedur e of COMMON SOUND OUT Copyright © 2007 LG Electronics. Inc. All right reserved. - 25 - LGE Internal Use Only Only for training and service purposes...
  • Page 26 - In th is case , remo ve the de vice and try to rebo ot the TV (AC pow er off/on ) Replace th e DC/DC Con verter (IC712) Copyright © 2007 LG Electronics. Inc. All right reserved. - 26 - LGE Internal Use Only...

  • Page 27: Block Diagram

    BLOCK DIAGRAM Copyright © 2007 LG Electronics. Inc. All right reserved. - 27 - LGE Internal Use Only Only for training and service purposes...
  • Page 28 1. VIDEO Copyright © 2007 LG Electronics. Inc. All right reserved. - 28 - LGE Internal Use Only Only for training and service purposes...
  • Page 29 2. AUDIO Copyright © 2007 LG Electronics. Inc. All right reserved. - 29 - LGE Internal Use Only Only for training and service purposes...
  • Page 30 3. VBR Application Copyright © 2007 LG Electronics. Inc. All right reserved. - 30 - LGE Internal Use Only Only for training and service purposes...
  • Page 31 MEMO Copyright © 2007 LG Electronics. Inc. All right reserved. - 31 - LGE Internal Use Only Only for training and service purposes...

  • Page 32: Exploded View

    EXPLODED VIEW Copyright © 2007 LG Electronics. Inc. All right reserved. - 32 - LGE Internal Use Only Only for training and service purposes...

  • Page 33: Exploded View Parts List

    Knob MOLD ABS SUB . 32LB9D , Control MAZ37056203 Bracket MOLD ABS CONTROL 32LB9 - ABS , 32LB9DS-AA EAY34795001 Power Supply Assembly FREET LCD Tornado 32inch (Power+Inverter) PSU LG INNOTEK CO., LTD EAY38639701 Power Supply Assembly LGLP32SLPV2 FREE Vitiaz2_32inch LCD Yuyang, H&E LIPS EBR38588101 PCB Assembly POWER T.T LB73B 32LB9D-AA AAUVLH AC-Inlet Ass’y Total...

  • Page 34: Replacement Parts List

    C1005X7R104KET 100nF 10% 16V X7R -55TO+125C C219 EAE30840301 10SVPC68M 68uF 20% 10V 1.97A -55TO+105C SVP C2144 0CE107WF6DC MVK6.3TP16VC100M 100uF 20% 16V 110MA -40TO+ - 34 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 35 C1005X7R104KET 100nF 10% 16V X7R -55TO+125C C2244 0CK104BF56A C1005X7R104KET 100nF 10% 16V X7R -55TO+125C C281 0CK104BF56A C1005X7R104KET 100nF 10% 16V X7R -55TO+125C - 35 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 36 CS1005XR473K250CR 0.047uF 10% 25V X7R -55TO C350 0CC221BKFAA C1005C0G1H221JT 220pF 5% 50V C0G -55TO+125C C419 0CK473CH56A C1608X7R1E473KT 47nF 10% 25V X7R -55TO+125C - 36 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 37 GRM1555C1H330J 33pF 5% 50V C0G -55TO+125C 1 C5012 0CE226WF6DC MVK5.0TP16VC22M 22uF 20% 16V 30MA -40TO+105 C551 0CK223CK56A UMK107JB223KA-T 22nF 10% 50V X7R -55TO+125C - 37 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 38 0402B102K500CT 1nF 10% 50V X7R -55TO+125C 1 C715 0CK104BF56A C1005X7R104KET 100nF 10% 16V X7R -55TO+125C C9019 0CK102BK56A 0402B102K500CT 1nF 10% 50V X7R -55TO+125C 1 - 38 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 39 Q303 0TR387500AA 2SC3875S(ALY) NPN 5V 60V 50V 150MA 100NA 70 ZD705 0DZ360009EB UDZS3.6B 3.6V 3.6TO3.845V 100OHM 200MW SOD3 - 39 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 40 EBC33751901 MNR14M0ABJ180 18OHM 5% 1/16W 4 SMD R/TP 8P R116 0RJ1002C678 MCR01MZPJ103 10KOHM 5% 1/16W 1005 R/TP ROH - 40 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 41 R201 0RJ1001E478 MCR01MZPF102 1KOHM 1% 1/16W 1005 R/TP ROHM R3037 0RJ4701C678 MCR01MZPJ472 4.7KOHM 5% 1/16W 1005 R/TP RO - 41 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 42 R363 0RJ4701C678 MCR01MZPJ472 4.7KOHM 5% 1/16W 1005 R/TP RO R4034 0RJ0000C678 MCR01MZPJ000 0OHM 5% 1/16W 1005 R/TP ROHM - 42 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 43 R4108 0RJ4701C678 MCR01MZPJ472 4.7KOHM 5% 1/16W 1005 R/TP RO R447 0RJ0332C678 MCR01MZPJ330 33OHM 5% 1/16W 1005 R/TP ROHM - 43 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 44 R5042 0RJ1001D677 MCR03EZPJ102 1KOHM 5% 1/10W 1608 R/TP ROHM R670 0RJ6801C678 MCR01MZPJ682 6.8KOHM 5% 1/16W 1005 R/TP RO - 44 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 45 R748 0RJ0102C678 MCR01MZPJ100 10OHM 5% 1/16W 1005 R/TP ROHM R9083 0RJ0752C678 MCR01MZPJ750 75OHM 5% 1/16W 1005 R/TP ROHM - 45 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 46 Filter,Bead HH-1M2012-121JT(H:1mm) 120OHM L9007 0LCML00003B Filter,Bead MLB-201209-0120P-N2 120OHM L403 6200J00005N Filter,Bead HH-1M2012-121JT(H:1mm) 120OHM L9008 0LCML00003B Filter,Bead MLB-201209-0120P-N2 120OHM - 46 - Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 47 PEJ024-01 1P 4P STRAIGHT TR 3.6MM BLACK DIP ABA32985001 Bracket Assembly STAND 32LB9D-UA LA73A 32LB9 J704 6612J10043A PPJ200-07 15MM 1RX4C ANGLE BK 3P DONGGUAN - 47 - Copyright © 2007 LG Electronics. Inc. All right reserved. 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 Copyright © 2007 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 50 Internal Use Only website:http://biz.LGservice.com LCD TV SERVICE MANUAL CHASSIS : LB73B MODEL : 32LB9D 32LB9D-AD CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

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