LG 26LH20R Service Manual
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LG 26LH20R Service Manual

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LCD TV

SERVICE MANUAL

CHASSIS : LP91A
MODEL : 26LH20R
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
North/Latin America
Europe/Africa
Asia/Oceania
26LH20R-MA
Internal Use Only
http://aic.lgservice.com
http://eic.lgservice.com
http://biz.lgservice.com

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Summary of Contents for LG 26LH20R

  • Page 1: Service Manual

    Internal Use Only North/Latin America http://aic.lgservice.com Europe/Africa http://eic.lgservice.com Asia/Oceania http://biz.lgservice.com LCD TV SERVICE MANUAL CHASSIS : LP91A MODEL : 26LH20R 26LH20R-MA CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • Page 2: Table Of Contents

    CONTENTS ....................2 PRODUCT SAFETY ..................3 SPECIFICATION ..................6 ADJUSTMENT INSTRUCTION..............11 TROUBLE SHOOTING ................16 BLOCK DIAGRAM...................19 EXPLODED VIEW .................. 20 SVC. SHEET ....................Copyright 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 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 LG Electronics. Inc. All right reserved. - 4 - LGE Internal Use Only Only for training and service purposes...
  • Page 5 CAUTION: Maintain original spacing between the replaced component and adjacent components and the circuit board to prevent excessive component temperatures. Copyright LG Electronics. Inc. All right reserved. - 5 - LGE Internal Use Only Only for training and service purposes...

  • Page 6: Specification

    26” HD LDC Module 626 x 373 x 44.1 with inverter (Maker : LGD) 0.1405 x 0.4215 12 EEFL Coating Copyright LG Electronics. Inc. All right reserved. - 6 - LGE Internal Use Only Only for training and service purposes...
  • Page 7 1920* 1080 56.25 148.5 HDTV 1080P 1920* 1080 67.432 59.94 148.350 HDTV 1080P 1920* 1080 67.5 60.00 148.5 HDTV 1080P Copyright LG Electronics. Inc. All right reserved. - 7 - LGE Internal Use Only Only for training and service purposes...

  • Page 8: Hdmi Input

    67.5 60.00 148.5 HDTV 1080P 1920 x 1080 24.00 74.25 HDTV 1080P 1920 x 1080 33.75 30.00 74.25 HDTV 1080P Copyright LG Electronics. Inc. All right reserved. - 8 - LGE Internal Use Only Only for training and service purposes...
  • Page 9 -> 0 † f † 1.0 Gap g between Back Cover and Side AV -> 0 † g † 1.0 Copyright LG Electronics. Inc. All right reserved. - 9 - LGE Internal Use Only Only for training and service purposes...
  • Page 10 B:Interval between right of active area and bezel C:Interval between top of active area and bezel D:Interval between bottom of active area and beze Active Area Bezel Copyright LG Electronics. Inc. All right reserved. - 10 - LGE Internal Use Only Only for training and service purposes...

  • Page 11: Adjustment Instruction

    - LH20/ LH30 4) Read and write bin file. Click “(1)Read” tab, and then load download file(XXXX.bin) by clicking “Read”. Filexxx.bin Filexxx. Copyright LG Electronics. Inc. All right reserved. - 11 - LGE Internal Use Only Only for training and service purposes...
  • Page 12 EDID. If the cables are connected, Downloading of edid could be failed. 5) Check The update SW Version. Copyright LG Electronics. Inc. All right reserved. - 12 - LGE Internal Use Only Only for training and service purposes...
  • Page 13 (CH +/-) and press ENTER( 6) ADC adjustment is executed automatically . 7) When ADC adjustment is finished, this OSD appear Copyright LG Electronics. Inc. All right reserved. - 13 - LGE Internal Use Only Only for training and service purposes...
  • Page 14 (3) Auto W/B adjustment instrument(only for Auto adjustment) 11) When adjustment is completed, Enter “COPY ALL”. 12) Exit adjustment mode using EXIT key on R/C. Copyright LG Electronics. Inc. All right reserved. - 14 - LGE Internal Use Only Only for training and service purposes...
  • Page 15 Dynamic Colour : Off (If you miss the upper condition, the coordinates of W/B can be lower than the spec.) Copyright LG Electronics. Inc. All right reserved. - 15 - LGE Internal Use Only Only for training and service purposes...

  • Page 16: Troubleshooting

    Fail Or Inverter Or Inverter Pass Check Output of IC802 Change IC802 Fail Pass Check LVDS Cable Change Module Fail Copyright LG Electronics. Inc. All right reserved. - 16 - LGE Internal Use Only Only for training and service purposes...
  • Page 17 Check the Input/Output Change the defect part Fail Of IC800 Pass Repeat [A], & [B] Process Repeat [A], & [B] Process Copyright LG Electronics. Inc. All right reserved. - 17 - LGE Internal Use Only Only for training and service purposes...
  • Page 18 Check The Input/Output Fail Change the defect part. Of IC600. Pass Change Speaker. Check The Speaker. Fail Pass Check The Speaker Wire. Copyright LG Electronics. Inc. All right reserved. - 18 - LGE Internal Use Only Only for training and service purposes...

  • Page 19: Block Diagram

    HDM 2_SCL/ SDA EEPROM EEPROM TMDS TMDS 24C02 24C02 HDMI1 HDMI1 HDMI_DATA_1 HDMI_DATA_1 TMDS TMDS HDMI2 HDMI2 HDMI_DATA_2 HDMI_DATA_2 EEPROM EEPROM HDMI1_SCL/ SDA 24C02 24C02 PC_Aud io _L/ R : PC_Aud io _L/ R : 7 00m Vrms 7 00m Vrms PC_Aud io PC_Aud io Serial Flas h...

  • Page 20: Exploded View

    200T 200N...
  • Page 21 +3.3V_MULTI_MST 4.7K R8010 4.7K R8011 *H/W OPTION R896 4.7K R898 4.7K +3.3V_MULTI_MST Small_HD Small_FHD Small_HD Non_Small_FHD R896 R898 R8010 R8011 R8010-*3 R896-*2 R898-*2 R8011-*3 4.7K 4.7K 4.7K 4.7K Small HD 4.7K 4.7K 100Hz Non_Small_HD DDR2_A[0-12] Apollo 100Hz Small FHD (27) 4.7K 4.7K 4.7K...
  • Page 22 DDR2_D[0-15] DDR2_D[0-15] +1.8V_DDR V_REF C904 C905 C918 0 . 0 1 u F 1000pF 0 . 1 u F V_REF IC900 C l o s e t o D D R 2 I C HYB18TC512160B2F-2.5 DDR2_A[0-12] DDR2_D[0] VREF DDR2_D[1] DDR2_D[2] DDR2_A[0] DDR2_D[3] DDR2_A[1]...
  • Page 23 L1000 CIC21J501NE P_24V_SMALL_15V +16V_NTP EAM58113401 C1001 C1006 C1046 0 . 1 u F 68uF 0.01uF **5V_MULTI->3.3V->1.2V L1012 MLB-201209-0120P-N2 P_12V_SMALL_15V +12V_AUDIO 120-ohm C1002 C1007 47uF 25V 0.01uF P1001 FM20020-24 L1001 P_5V +5VST_MST 120-ohm Power ON C1003 C1008 C1011 0.01uF 0.01uF 10uF IC1001 BD9130EFJ-E2 5.2V...
  • Page 24 AMP :GAIN X 4 +12V_AUDIO IC601 +1.8V HOTEL_OPT L606 C620 R613-* +16V_NTP 1 OUT1 LM324D OUT4 120-ohm 0.1uF Q600 MLB-201209-0120P-N2 RT1C3904-T112 +1.8V_AVDD R607 NON_HOTEL_OPT 0LCML00003B R613 R604 C612 C642 C615 C617 3 . 3 READY 330uF35V C627 L605 10uF 0.1uF 0.1uF 6800pF MNT_LOUT...
  • Page 25 TU500-*1 TAFT-H203F TU500 TAFT-Z203D NC_1 GND_1 1 NC_1 +B[5V] +5V_TUNER 2 GND_1 N e a r t h e p i n NC_2 3 +B[5V] C501 C508 C505 C506 C509 0.01uF 10uF RF_AGC 4 NC_2 100uF16V 100uF16V 100uF16V L500 TP[3.3V_OPT] 5 RF_AGC 120-ohm NTSC_TUNER...
  • Page 26 OPTION SW_HPD : USE SW HPD (Default) MST_HPD : USE MST HPD +5V_MULTI +5V_MULTI +5V_HDMI_3 +5V_HDMI_2 2SC3875S +5V_HDMI_2 +5V_HDMI_3 Q301 D301 D302 HPD_MST_2 R303 R314 RT1C3904-T112 KDS184S KDS184S Q302 IC301 IC302 2SC3875S R301 R312 CAT24C02WI-GT3 CAT24C02WI-GT3 HPD_MST_3 RT1C3904-T112 C300 R309 R311 R319 R320...
  • Page 27 COMPONENT1, AV1, MNT_OUT[JACK PACK TYPE D] : JK100 JK100 PPJ226-01 9A [GN]1P_CAN 4A [GN]O-SPRING_A COMP2_Y ZD102 R109 SD05 3A [GN]CONTACT_A SD05 ZD103 9B [BL]1P_CAN 8B [BL]C-LUG_A COMP2_PB ZD101 R108 9C [RD]1P_CAN_1 SD05 8C [RD]C-LUG_A COMP2_PR ZD100 R107 SD05 9D [WH]1P_CAN 8D [WH]C-LUG_A_1 R114 COMP2_L...
  • Page 28 RS-232C (CI ITEM) +5V_MULTI JK200 JK202 KCN-DS-1-0088 C204 C206 C207 0 . 1 u F 0 . 1 u F 0 . 1 u F +3.3V_MST KCN-DS-1-0089 6630TGA004K RED_GND IC200 ST3232CDR GND_2 C203 0.1uF PC_R 16 VCC R202 R211 D200 GREEN_GND C200 ADUC30S03010L_AMODIODE...
  • Page 29 PANEL WAFER TXCE0+,TXCE0-,TXCE1+,TXCE1-,TXCE2+,TXCE2-,TXCE3+,TXCE3-,TXCE4+,TXCE4-,TXCLKE+,TXCLKE-,TXCLKO+,TXCLKO-,TXCO0+,TXCO0-,TXCO1+,TXCO 1-,TXCO2+,TXCO2-,TXCO3+,TXCO3-,TXCO4+,TXCO4- TXCE0+,TXCE0-,TXCE1+,TXCE1-,TXCE2+,TXCE2-,TXCE3+,TXCE3-,TXCE4+,TXCE4-,TXCLKE+,TXCLKE-,TXCLKO+,TXCLKO-,TXCO0+,TXCO0-,TXCO1+,TXCO 1-,TXCO2+,TXCO2-,TXCO3+,TXCO3-,TXCO4+,TXCO4- +5V_+12V_LCD +5V_+12V_LCD P403 +5V_+12V_LCD P401 P402 SMW200-28C TF05-51S FF10001-30 I R ( N o n 1 9 / 2 2 / 2 6 ) CONTROL KEY(Non 19/22/26) L411 500-ohm SUB_SCL TXCE3- NON_19_22_26" TXCE3+ H D ( 2 6 / 3 2 / 3 7 / 4 2 / 4 7 " ) L410 500-ohm SUB_SDA...
  • Page 30 Feb., 2009 P/NO : MFL60021514 Printed in Korea...

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