LG LC370WXN-SAB1-621 Service Manual
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LG LC370WXN-SAB1-621 Service Manual

LG LC370WXN-SAB1-621 Service Manual

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LC370WXN-SAB1-621
[ RoHS Verified ]

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Summary of Contents for LG LC370WXN-SAB1-621

  • Page 1 LC370WXN-SAB1-621 [ RoHS Verified ]...
  • Page 2 SAFETY PRECAUTIONS Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it. To avoid potential hazards, use this product only as specified. Only qualified personnel should perform service procedures. LCD Module is a display device to be divided into Board Assembly and Backlight Assembly. Board Assembly consists of electric circuitry, PCB and two sheets of glass.
  • Page 3 So, handle with care. (15) If a discrepancy occurs due to any arbitrary modification or disassembly, LG Display is not responsible for function, (7) While moving the product, be sure to turn off the power, quality or other items.
  • Page 4 SERVICING PRECAUTIONS Color TFT LCD Module is apt to be damaged by both electrical and mechanical stresses. Users, therefore, are requested to follow the “Servicing precautions of color TFT LCD Module” on the followings. CAUTION “Before servicing the module, read the safety precautions in this manual.” System Assembler (1) Follow power sequence.
  • Page 5 (13) Do not provide strong pressure at connecting. (15) Never connect/disconnect at power on. Strong pressure can transfer the force to TCP which is the LCD Module consists of CMOS which is known as weak weakest parts of LCD Module. Eventually can make TCP component against EOS.

  • Page 6: Table Of Contents

    CONTENTS Product Overview Module Formation Exploded View Exploded View Parts List Block Diagram Trouble shooting Signal Timing Specifications Timing Check Sheet Disassembly Assembly Packing Form Parts List * Annexing : Schematic Diagram / Printed Circuit Board...

  • Page 7: Product Overview

    Product Overview General Description TFT-LCD is made up of the lower plate glass with TFT, the upper plate glass with color filter, the middle Liquid Crystal. TFT convey and control the signal and the Liquid Crystal control transmitted ray as molecular structure different by admitted volt.

  • Page 8: Module Formation

    Module Formation * Connector 1(CN1) : User Connector Source PCB Source COF Case Assembly Tape Gate COF...
  • Page 9 Cover Shield(Control) Control PCB Fixed screw * Connector 1(CN1) Cover Shield(Inverter) Backlight System Inverter ID Label Backlight Label LC370WXN (SA)(B1) RoHS Verified Inverter Fixed screw...
  • Page 10 MODULE CONNECTOR(CN1) PIN CONFIGURATION Description Symbol Note Power Supply +12.0V VLCD Power Supply +12.0V VLCD Power Supply +12.0V VLCD Power Supply +12.0V VLCD Ground Ground Ground Ground Select LVDS Data format Select Note 1 Dynamic CR Enable (‘L’ = Disable , ‘H’ = Enable ) DCR Enable Ground LVDS Receiver Signal(-)
  • Page 11 INVERTER Connector Pin configuration Description Symbol Power Supply +24.0V Power Supply +24.0V Power Supply +24.0V Power Supply +24.0V Power Supply +24.0V Backlight Ground Backlight Ground Backlight Ground Backlight Ground Backlight Ground Analog dimming voltage BR-A DC 0.0V ~ 3.3V (Typ : 1.65V) 0.0V ~ 5.0V On/Off Burst dimming Voltage...

  • Page 12: Exploded View

    Exploded View...

  • Page 13: Exploded View Parts List

    Exploded View Parts List PART NO. DESCRIPTION 5135L-0022F/0053J/0013K PROTECT FILM 7250L-0082C OPP Film Tape 3111L-0236A Case Top Assembly 4000L-0006A SCREW 6308L-1084A/1618A/1231A POLARIZER(TOP) 6308L-1085A/1619A/1232A POLARIZER(BOTTOM) 0IOKL-0114A COF(D-IC, Gate) 6871L-1353A PWB(PCB) Assembly, Source _ Left 6871L-1354A PWB(PCB) Assembly, Source _ Right 0ILUL-0049A COF(D-IC, Source) 6871L-1385A PWB(PCB) Assembly, Control...

  • Page 14: Block Diagram

    Block Diagram...

  • Page 15: Trouble Shooting

    Trouble shooting Means that the screen is not affected by the signal data when you connect the product to Backlight or No Display user connector and then 12V input power ON/OFF. Less than Electricity More than Electricity Consumption Input Current Consumption 150mA 150mA...
  • Page 16 Means that the screen is affected by the signal data when you connect the product to Backlight or user Abnormal Display connector and then turn 12V input power ON/OFF. User Connector User Connector(CN1) (C-PCB CN1)Cold soldering/ Resoldering / Replace Open/Short Check Source PCB Gamma Block LVDS Termination Gamma Voltage Level Check...

  • Page 18: Signal Timing Specifications

    Signal Timing Specifications...
  • Page 19 Signal Timing Waveforms...

  • Page 20: Timing Check Sheet

    Timing Check Sheet...
  • Page 21 CLK High CLK Low...
  • Page 22 DATA Set up time DATA Hold time...
  • Page 23 POL Set up time POL Hold Time...

  • Page 24: Disassembly

    Disassembly Separate Control PCB / Separate Cover Separate Cover Separate FFC Cable Separate Connector Shield(Control) FFC Cable Shield(Inverter) Separate Board Assembly from Attach dummy sheet on Remove dust on the Separate Separate the fixed Backlight Assembly. the upper Polarizer. upper Polarizer. Case Assembly screw of Case Assembly.
  • Page 25 Separate the Cover Shield (Inverter). If you need to replace the Inverter, separate the Inverter. It s unnecessary to repair the normal TCP / Polarizer. Separate the Connector. If you need to replace the Inverter, separate the Inverter. It s unnecessary to repair the normal TCP / Polarizer.
  • Page 26 Remove dust on the upper Polarizer. Attach the dummy sheet on the upper Polarizer. Separate the Board Assembly from Backlight Assembly. Remove dust on the lower Polarizer.
  • Page 27 Attach the dummy sheet on the lower Polarizer. Take charge of the Board Assembly in tray. Attach the dummy sheet on Backlight Assembly. Take charge of the Backlight Assembly in Bag.
  • Page 28 Vacuum PAD VACUUM PAD Atmospheric pressure : 760 torr(1 pressure) It is used to move or assemble, disasemble the materials by making vacuum condition between Panel and Pad. also used on the condition of one or two level. when it is needed on the small inche s LCM, use the 1 level vacuum pad.

  • Page 29: Assembly

    Assembly Detach the protection film Clean the Remove dust the Detach the dummy sheet Assemble Board Assembly with on the lower Polarizer. lower Polarizer. lower Polarizer. on Backlight Assembly. Backlight Assembly. Attach dummy sheet on the Assemble the fixed screw Assemble the Separate dummy sheet on First screen...
  • Page 30 Detach the dummy sheet on Backlight Assembly. Assemble the Board Assembly with Backlight Assembly. Take a first screen inspection the Backlight. Check the Backlight dust. Separate the dummy sheet on the upper Polarizer. Assemble the Case Assembly.
  • Page 31 Assemble the fixed screw of Case Assembly. Attach the dummy sheet on the upper Polarizer. Assemble the Control PCB. At this time, Connect the FFC from the Source PCB. Assemble the Connector. Assemble the Cover Shield(Control)
  • Page 32 Assemble the Cover Shield (Inverter). Separate the dummy sheet on the upper Polarizer. Detach it to opposite direction for preventing static electricity. Polish the upper Polarizer with soft wiper. Attach the protection film on the upper Polarizer. Take a final inspection.
  • Page 33 Wrap the module up in Shielding Bag. Caution...

  • Page 34: Packing Form

    Packing Form LC370WXN-SAB1 Packing Assembly Description Material LCM MODULE 3880L-0016K PACKING, TOP(R) 3920L-0890A PACKING, TOP(L) 3920L-0889A TAPE MASKING 20MMX50M PACKING, BOTTOM 3920L-0891B PAPER_DW 3890L-0028Q LABEL ART, 100X70 TAPE OPP 70MMX300M Description Material PACKING Assembly BAND, CLIP CLIP 18MM BAND ANGLE, PACKING PAPER, DW LABEL ART, 100X100...

  • Page 35: Parts List

    Parts List (Specified parts list is subject to change.) PART No. DESCRIPTION SPECIFICATION LOCA. No. 6060L-1001A BOARD assembly LC370WXN-SAB1-F11 6871L-1353A PCB Assembly Source, Left, LC370WXN-SAA1-F11(LEFT) 6871L-1354A PCB Assembly Source, Right, LC370WXN-SAA1-F11(RIGHT) 6871L-1385A PCB Assembly Control, Single, LC370WXN-SAB1-F11 CIRCUIT_CAPACITOR 0CHZL-0015A Array 10uF, Z, 10V, Y5V, 1.0mm, 3216, R/TP C92,C93 0CHZL-0004A...
  • Page 36 PART No. DESCRIPTION SPECIFICATION LOCA. No. 6630L-0187A CONNECTOR GF05A-60S-AF, LS CABLE, 60 Pin, 0.5 mm, Angle, Au, NEW FPC 6630L-0187A CONNECTOR GF05A-60S-AF, LS CABLE, 60 Pin, 0.5 mm, Angle, Au, NEW FPC CN4,CN6 6630L-0193A CONNECTOR GF10A-4S-LSS-AU, LS CABLE, 4 Pin, 1.0 mm, Angle, Sn, FPC CN2 6630L-0204A Wire-Board IS100-L30B-C23, UJU, 30PIN, 1.0MM, Angle, Female, R/TP, 2.3MM, Y...
  • Page 37 PART No. DESCRIPTION SPECIFICATION LOCA. No. 0RH3902C422 chip 39K ohm, 1/16W, 1608, 1%, R/TP 0RH0472C422 chip 47 ohm, 1/16W, 1608, 1%, R/TP R35,R37 0RH8201C422 chip 8.2K ohm, 1/16W, 1608, 1%, R/TP 0RH7502C422 chip 75K ohm, 1/16W, 1608, 1%, R/TP 0RH5601C422 chip 5.6K ohm, 1/16W, 1608, 1%, R/TP R65,R66,R71...
  • Page 38 PART No. DESCRIPTION SPECIFICATION LOCA. No. 0TR900009BA Bipolar IMX9, ROHM, NP DUAL, TP, SMT6, N/A 0LCAA-0002A Coil CVOB8022-1R5220, COREVISION, 22UH, M=20%, 1.5A L1,L2 6851L-0129D 6851L-0129D, EUNSUNG, 4pin, 466 mm, LC370WXN-SAA1, INVERTER *6851L-0129E 6851L-0129E, STANDARD, 4pin, 466 mm, LC370WXN-SAA1, INVERTER 6851L-0090A 6851L-0090A, STANDARD, 60pin, 54X30.5 mm, LC320WX3-SLC1, S-C 6640L-0002A FINGER...
  • Page 39 TOP_L, EPS, LC370WUN 3920L-0890A Packing TOP_R, EPS, LC370WUN 3920L-0891B Packing BOTTOM, EPS, LC370WUN 3930L-0017A Pallet PLYWOOD, 1140X990X117.5 7250L-0041A TAPE(RAW) OPP 70MMX300M(LG,PHLIPS LCD) LABEL 3850L-0112A Label PALLET, ART, 100X100 3850L-0111A Label BOX, ART, 100X70 3850L-0088A Label ID, YUPO, 78X37 BACKLIGHT 6900L-0229G...
  • Page 40 [ T_ CON BL OCK ] [ SPREAD SPECTRUM] [ USER CONNECT OR] [ ASI C OPTI ON BL OCK] [ ASI C CONTROL SI GNAL BL OCK] [ EEPROM BL OCK] [ AI I / F BL OCK] [ RESET BL OCK] [ WAVY I / F BL OCK- 4 PI N] [ CONT ROL - SOURCE RI GHT CONNECT OR] [ CONTROL - SOURCE L EFT CONNECT OR]...
  • Page 41 [ P- VCOM BL OCK]...
  • Page 44 Printed Circuit Board SOURCE(Left_Top) SOURCE(Right_Top) Control(Top)
  • Page 45 MODEL : LC370WXN-SAB1-621 September 2008 Printed in Korea...

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