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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 : LA73A
MODEL : 32LB9D
MODEL :
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
32LB9DB
website:http://biz.LGservice.com
32LB9D-UA
32LB9DB-UB
Internal Use Only

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Summary of Contents for LG 32LB9D

  • Page 1 Internal Use Only website:http://biz.LGservice.com LCD TV SERVICE MANUAL CHASSIS : LA73A MODEL : 32LB9D 32LB9D-UA MODEL : 32LB9DB 32LB9DB-UB CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • Page 2: Table Of Contents

    TROUBLE SHOOTING & ............... 15 BLOCK DIAGRAM.................. 28 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: Product Safety

    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 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

    2) Humidity : ~ 80 % Storage Environment 1) Temp : -20 ~ 60 deg 2) Humidity : 0 ~ 90 % Copyright © 2007 LG Electronics. Inc. All right reserved. - 6 - LGE Internal Use Only Only for training and service purposes...
  • Page 7 24.000 HDTV 1080P 1920*1080 26.97 23.94 HDTV 1080P 1920*1080 33.75 30.000 HDTV 1080P 1920*1080 33.71 29.97 HDTV 1080P Copyright © 2007 LG Electronics. Inc. All right reserved. - 7 - LGE Internal Use Only Only for training and service purposes...
  • Page 8 108.00 VESA (SXGA) 1280*1024 79.976 75.025 VESA (SXGA) 1600*1200 75.00 60.00 VESA (UXGA) 1920*1080 67.5 148.5 HDTV 1080P Copyright © 2007 LG Electronics. Inc. All right reserved. - 8 - LGE Internal Use Only Only for training and service purposes...
  • Page 9 24.000 HDTV 1080P 1920*1080 26.97 23.94 HDTV 1080P 1920*1080 33.75 30.000 HDTV 1080P 1920*1080 33.71 29.97 HDTV 1080P Copyright © 2007 LG Electronics. Inc. All right reserved. - 9 - LGE Internal Use Only Only for training and service purposes...

  • Page 10: Adjustment Instruction

    OK 03 03x (When succeeded) <Fig, 2> Complete adjustment ad 00 90 d 00 OK90x note) ADC adjustment RS232C Protocol_Ver 1.0 Copyright © 2007 LG Electronics. Inc. All right reserved. - 10 - LGE Internal Use Only Only for training and service purposes...
  • Page 11 Press the Instart of adjustment R/C to enter the 7.Baud Rate ‘Normal’. menu and set the Baud Rate to 115200 to check the 232-C operation. Copyright © 2007 LG Electronics. Inc. All right reserved. - 11 - LGE Internal Use Only Only for training and service purposes...
  • Page 12 8A 20 E0 2D 10 3E 96 18 0E 1F 00 80 30 40 C4 8E 21 1C 00 00 00 00 Copyright © 2007 LG Electronics. Inc. All right reserved. - 12 - LGE Internal Use Only Only for training and service purposes...
  • Page 13 R Gain G Gain <Fig. 9> Connection diagram for HDMI input B Gain R Cut G Cut B Cut Copyright © 2007 LG Electronics. Inc. All right reserved. - 13 - LGE Internal Use Only Only for training and service purposes...
  • Page 14 Color temperature Color analyzer Color coordinate COOL CA-210 0.276±0.002 0.283±0.002 MEDIUM CA-210 0.285±0.002 0.293±0.002 WARM CA-210 0.313±0.002 0.329±0.002 Copyright © 2007 LG Electronics. Inc. All right reserved. - 14 - LGE Internal Use Only Only for training and service purposes...

  • Page 15: Troubleshooting

    TROUBLESHOOTING 1. VIDEO (1) NO OSD(FHD) Copyright © 2007 LG Electronics. Inc. All right reserved. - 15 - LGE Internal Use Only Only for training and service purposes...
  • Page 16 Copyright © 2007 LG Electronics. Inc. All right reserved. - 16 - LGE Internal Use Only Only for training and service purposes...
  • Page 17 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. - 17 - LGE Internal Use Only Only for training and service purposes...
  • Page 18 3._ Check X 260 Input ( CLK, SOP, Valid, Error, Data) Check LG DT3303 Outputs Check X260 I NPUT CLK, SOP, Valid, Error, Data 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) , Data (30Bit) , DE(#U6) 6 : _Check X 260 (IC101) Inputs _Signal shape is sa me (above) Copyright © 2007 LG Electronics. Inc. All right reserved. - 19 - LGE Internal Use Only Only for training and service purposes...
  • Page 20 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. - 20 - LGE Internal Use Only Only for training and service purposes...
  • Page 21 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. - 21 - LGE Internal Use Only Only for training and service purposes...
  • Page 22 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. - 22 - LGE Internal Use Only Only for training and service purposes...
  • Page 23 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. - 23 - LGE Internal Use Only Only for training and service purposes...
  • Page 24 VSB DATA(AR651, AR656), VSB_CLK(R658) VSB ERROR, VALID, SOP (AR657) Check X260 (IC101) 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 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. - 25 - LGE Internal Use Only Only for training and service purposes...
  • Page 26 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. - 26 - LGE Internal Use Only Only for training and service purposes...
  • Page 27 - 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. - 27 - LGE Internal Use Only...

  • 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 Copyright © 2007 LG Electronics. Inc. All right reserved. - 29 - LGE Internal Use Only Only for training and service purposes...
  • Page 30 - Power 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 Main Total Assembly 32LB9D-UA BRAND LA73A MGJ32918103 Plate,Shield PRESS SPTE 0.5 SHIELD SPTE 32” everest3 chassis EBR37862601 PCB Assembly,Sub SUB T.T LA73A 32LB9D-UA AUSVLHX [LA73A] ] 32LB9D-UA CTRL TOTAL EAY33058501 SMPS,AC/DC LGLP 3237HEP 90VTO264V 180W 47-63 UL/CSA/SEMKO HE/AT/YY 3 EBR37577301 PCB Assembly,Sub POWER T.T LA73A 32LB9D-UA AUSLLHX 32LB9D-UA AC_INLET ASSY...

  • Page 34: Replacement Parts List

    REPLACEMENT PARTS LIST DATE: 2007. 03. 16. LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION CAPACITORs C2145 0CK105CD56A C1608X7R1A105KT 1uF 10% 10V X7R -55TO+125C 16 C2146 0CK104BF56A C1005X7R104KET 100nF 10% 16V X7R -55TO+125C 1 C101 0CH4471K416 C2012C0G1H471JT 470pF 5% 50V C0G -55TO+125C 2...
  • Page 35 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C2190 0CK105CD56A C1608X7R1A105KT 1uF 10% 10V X7R -55TO+125C 16 C2244 0CK104BF56A C1005X7R104KET 100nF 10% 16V X7R -55TO+125C 1 C2191 0CK105CD56A C1608X7R1A105KT 1uF 10% 10V X7R -55TO+125C 16 C225 0CK104BF56A C1005X7R104KET 100nF 10% 16V X7R -55TO+125C 1...
  • Page 36 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C333 EAE33970001 CS1005X5R105K6R3NR 1uF 10% 6.3V X5R -55TO+85C C4013 0CK104BF56A C1005X7R104KET 100nF 10% 16V X7R -55TO+125C 1 C334 EAE33970001 CS1005X5R105K6R3NR 1uF 10% 6.3V X5R -55TO+85C C4014 0CH5220K618 0402N220M500LT 22pF 5% 50V C0G -55TO+125C 100 C335...
  • Page 37 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C481 0CK104BF56A C1005X7R104KET 100nF 10% 16V X7R -55TO+125C 1 C5049 0CE106WFKDC MVK4.0TP16VC10M 10uF 20% 16V 16MA -40TO+105C C482 0CK104BF56A C1005X7R104KET 100nF 10% 16V X7R -55TO+125C 1 C505 0CK101BK4EA C1005C0G1H101JT 100pF 5% 50V C0G -55TO+125C 1...
  • Page 38 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C598 0CK103CK56A 0603B103K500CT 10nF 10% 50V X7R -55TO+125C 16 C645 0CK103BH56A C1005X7R1E103KT- 10nF 10% 25V X7R -55TO+125C C599 0CK104BF56A C1005X7R104KET 100nF 10% 16V X7R -55TO+125C 1 C647 0CE476WF6DC MVK6.3TP16VC47M 47uF 20% 16V 80MA -40TO+105C...
  • Page 39 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C722 0CK101BK4EA C1005C0G1H101JT 100pF 5% 50V C0G -55TO+125C 1 C821 0CK104BF56A C1005X7R104KET 100nF 10% 16V X7R -55TO+125C 1 C723 0CK101BK4EA C1005C0G1H101JT 100pF 5% 50V C0G -55TO+125C 1 C822 0CK104BF56A C1005X7R104KET 100nF 10% 16V X7R -55TO+125C 1...
  • Page 40 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION ZD406 0DZ360009EB UDZS3.6B 3.6V 3.6TO3.845V 100OHM 200MW SOD323 IC605 0IPMG00049A AZ1117H-1.8TR/E1[H13A] 3.2TO10V 1.8V 0W SOT22 ZD407 0DZ560009DA UDZS5.6B 5.6V 5.49TO5.73V 60OHM 200MW SOD323 IC700 EAN32662801 KA7809ERTM 35V to 40V 9V 1W DPAK R/TP 3P FAI ZD408 0DZ560009DA UDZS5.6B 5.6V 5.49TO5.73V 60OHM 200MW SOD323...
  • Page 41 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION Q702 0TFVI80067A SI3865BDV(E3) N-CHANNEL MOSFET 8V +-8V 2.9A 0 R1021 0RJ0000C678 MCR01MZPJ000 0OHM 5% 1/16W 1005 R/TP ROHM Q802 0TFDI80001B 2N7002(F) N-CHANNEL DMOSFET 60V +-20V 115MA 7 R1022 0RJ0000C678 MCR01MZPJ000 0OHM 5% 1/16W 1005 R/TP ROHM...
  • Page 42 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R163 EBC33834701 MCR03EZP5FX7150 715OHM 1% 1/10W 1608 R/TP RO R3014 0RJ1000C678 MCR01MZPJ101 100OHM 5% 1/16W 1005 R/TP ROHM R164 EBC33834701 MCR03EZP5FX7150 715OHM 1% 1/10W 1608 R/TP RO R3017 0RJ4701C678 MCR01MZPJ472 4.7KOHM 5% 1/16W 1005 R/TP ROHM...
  • Page 43 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R343 0RJ0000C678 MCR01MZPJ000 0OHM 5% 1/16W 1005 R/TP ROHM R402 0RJ0332C678 MCR01MZPJ330 33OHM 5% 1/16W 1005 R/TP ROHM R344 0RJ0000C678 MCR01MZPJ000 0OHM 5% 1/16W 1005 R/TP ROHM R4020 0RJ5101C678 MCR01MZPJ512 5.1KOHM 5% 1/16W 1005 R/TP ROHM...
  • Page 44 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R409 0RJ0332C678 MCR01MZPJ330 33OHM 5% 1/16W 1005 R/TP ROHM R424 0RJ9101D477 MCR03EZPF912 9.1KOHM 1% 1/10W 1608 R/TP ROHM R4092 0RJ0000C678 MCR01MZPJ000 0OHM 5% 1/16W 1005 R/TP ROHM R425 0RJ1800C678 MCR01MZPJ181 180OHM 5% 1/16W 1005 R/TP ROHM...
  • Page 45 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R5020 0RJ4701D677 MCR03EZPJ472 4.7KOHM 5% 1/10W 1608 R/TP ROHM R524 0RJ0752C678 MCR01MZPJ750 75OHM 5% 1/16W 1005 R/TP ROHM R5021 0RJ4701D677 MCR03EZPJ472 4.7KOHM 5% 1/10W 1608 R/TP ROHM R525 0RJ1100D677 MCR03EZPJ111 110OHM 5% 1/10W 1608 R/TP ROHM...
  • Page 46 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R633 0RJ4701C678 MCR01MZPJ472 4.7KOHM 5% 1/16W 1005 R/TP ROHM R714 0RJ0752C678 MCR01MZPJ750 75OHM 5% 1/16W 1005 R/TP ROHM R635 0RJ0000C678 MCR01MZPJ000 0OHM 5% 1/16W 1005 R/TP ROHM R715 0RJ4703C678 MCR01MZPJ474 470KOHM 5% 1/16W 1005 R/TP - RO...
  • Page 47 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R8022 0RJ0222C678 MCR01MZPJ220 22OHM 5% 1/16W 1005 R/TP ROHM L102 6210TCE001G Filter,Bead HH-1M3216-501JT 500OHM R8023 0RJ0222C678 MCR01MZPJ220 22OHM 5% 1/16W 1005 R/TP ROHM L200 EAM32500503 Filter,Bead BLM18AG221SN1D 220ohm 200mA R8024 0RJ0222C678 MCR01MZPJ220 22OHM 5% 1/16W 1005 R/TP ROHM...
  • Page 48 LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LOC. NO. PART NO. DESCRIPTION / SPECIFICATION L610 0LCML00003B Filter,Bead MLB-201209-0120P-N2 120OHM J405 6630TGA004K KCN-DS-1-0089 D-SUB 15P 2.29MM STRAIGHT FEMAL L611 0LCML00003B Filter,Bead MLB-201209-0120P-N2 120OHM P102 6602T20008N SMW200-14P 14P 2.00MM 1R STRAIGHT DIP ST NATU L612 6200J00005N Filter,Bead HH-1M2012-121JT(H:1mm) 120OHM...
  • Page 49 Remote Controller COMPLEX LA73A 42LB5DF-UA 49519K0002A Plate Assembly SUPPORTER UPPER 26INCH 6852TAZ010F Cable,Assembly KCN-NS-0-0038 SMA ABA32985001 Bracket Assembly STAND 32LB9D-UA LA73A 32LB9 FAB30016415 Screw Assembly FAB30016415 MACHINE TYPE D4.0 FAB30021301 Screw,Tapping 1TTG0403315 TH + 1 4MM 16MM - 49 -...
  • Page 52 Jul., 2007 P/NO : MFL36768805 Printed in Korea...

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