LG L192WS-BNQ Service Manual
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LG L192WS-BNQ Service Manual

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COLOR MONITOR

SERVICE MANUAL

MODEL:L192WS-BNQ/SNQ. A**JQP/ A**QQP
(
) **Same model for Service
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
E-mail:http://www.LGEservice.com/techsup.html
1
*To apply the MSTAR Chip.

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Summary of Contents for LG L192WS-BNQ

  • Page 1: Color Monitor

    E-mail:http://www.LGEservice.com/techsup.html COLOR MONITOR SERVICE MANUAL MODEL:L192WS-BNQ/SNQ. A**JQP/ A**QQP ) **Same model for Service CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. *To apply the MSTAR Chip.

  • Page 2: Table Of Contents

    CONTENTS SPECIFICATIONS ........... 2 SERVICE OSD ............14 PRECAUTIONS ............3 TROUBLESHOOTING GUIDE ......15 TIMING CHART ............7 WIRING DIAGRAM ..........22 DISASSEMBLY ............8 BLOCK DIAGRAM...........10 EXPLODED VIEW ........... 23 DISCRIPTION OF BLOCK DIAGRAM ....11 REPLACEMENT PARTS LIST ......25 ADJUSTMENT ............

  • Page 3: Precautions

    PRECAUTION WARNING WARNING FOR THE SAFETY-RELATED COMPONENT. BE CAREFUL ELECTRIC SHOCK ! • There are some special components used in LCD monitor that are important for safety. These parts are • If you want to replace with the new backlight (CCFL) marked on the schematic diagram and or inverter circuit, must disconnect the AC...

  • Page 4: Servicing Precautions

    SERVICING PRECAUTIONS CAUTION: Before servicing receivers covered by this 9. Use with this receiver only the test fixtures specified in service manual and its supplements and addenda, read this service manual. and follow the SAFETY PRECAUTIONS on page 3 of this CAUTION: Do not connect the test fixture ground strap publication.
  • Page 5 General Soldering Guidelines Replacement 1. Carefully insert the replacement IC in the circuit board. 1. Use a grounded-tip, low-wattage soldering iron and 2. Carefully bend each IC lead against the circuit foil pad appropriate tip size and shape that will maintain tip and solder it.
  • Page 6 Circuit Board Foil Repair At Other Connections Excessive heat applied to the copper foil of any printed Use the following technique to repair the defective copper circuit board will weaken the adhesive that bonds the foil to pattern at connections other than IC Pins. This technique the circuit board causing the foil to separate from or involves the installation of a jumper wire on the component side of the circuit board.

  • Page 7: Timing Chart

    TIMING CHART VIDEO SYNC Front Back distingishme Frequency Total period Display Sync. CLOCK Polority Porch Porch Resolution [kHz]/ [Hz] [MHz] 25.175 31.469 H(Pixels) 640 x 350 V(Lines) 70.8 H(Pixels) 28.321 31.468 720 X 400 V(Lines) 70.09 H(Pixels) 25.175 31.469 640 x 480 V(Lines) 59.94 H(Pixels)

  • Page 8: Disassembly

    DISASSEMBLY Put a soft cushion on the desk and lay the stand on Twist the stand assy until “click” , then take out the its side so that the base is accessible. stand assy into the product in the correct direction as shown in picture. Pry the hinge cover by flat-tip screw driver or jig and Unscrew the 4 screws on the hinge to separate the be careful to prevent from scratching the hinge...
  • Page 9 Pull out the lamp wire. Pull out the LVDS cable...

  • Page 10: Block Diagram

    BLOCK DIAGRAM L192WS consists of a main body and a stand (base). The main body contains a InnoLux (or CMO) LCD module with 4 CCFL lamps, a power board (includes AC/DC, DC/DC, inverter and panel power source), a control board (key pad) and an interface board. The block diagram is shown as below. InnoLux TFT-LCD Module with 4FFCLs 128KB Flash ROM LVDS Transmitter...

  • Page 11: Description Of Block Diagram

    DESCRIPTION OF BLOCK DIAGRAM 1. Video Controller Part. This part amplifies the level of video signal for the digital conversion and converts from the analog video signal to the digital video signal using a pixel clock. The pixel clock for each mode is generated by the PLL. The range of the pixel clock is from 25MHz to 135MHz. This part consists of the Scaler, ADC convertor and LVDS transmitter.

  • Page 12: Lips Board Block Diagram

    LIPS Board Block Diagram 50~60Hz Operation description_LIPS 1. EMI components. This part contains of EMI components to comply with global marketing EMI standards like FCC, VCCI CISPR, the circuit included a line-filter, across line capacitor and of course the primary protection fuse. 2.

  • Page 13: Adjustment

    ADJUSTMENT Windows EDID V1.0 User Manual 2. EDID Read & Write 1) Run WinEDID.exe Operating System: MS Windows 98, 2000, XP Port Setup: Windows 98 => Don’t need setup Windows 2000, XP => Need to Port Setup. This program is available to LCD Monitor only. 1.

  • Page 14: Service Osd

    SERVICE OSD 1) Turn off the power switch at the front side of the display. 2) Wait for about 5 seconds and press MENU, POWER switch with 1 second interval. 3) The SVC OSD menu contains additional menus that the User OSD menu as described below. a) Auto Color : W/B balance and Automatically sets the gain and offset value.

  • Page 15: Troubleshooting Guide

    TROUBLESHOOTING GUIDE 1. No Power & Power LED Off No power Check IC802, Check circuit Check primary C805, T801 if short rectifier voltage Check F801, P801, D801 Check pin3 of Check R801, R805, IC802 voltage R822, R823, R817 about 1V Check R803, R807, Check pin2 of IC802 R824, R825...
  • Page 16 2. Backlight can’t be turned on No raster? LED Green? Backlight can’t be turned on. Check power Is there 5Vdc supply voltage on pin2 of IC501? Check I/F Is there high-level voltage Is Ok R526? board on pin10 of IC501? R526 open Are connected rightly Connecting the...
  • Page 17 3. DC output voltage is unstable Output Voltage Unstable Check Check ZD801, ZD802, Check circuit if Q801 below 0.3V short ZD803, D803, D805 Check Q801, Q802 Check Pin R of Check R809, R814, Check reference IC801, R818 IC803 voltage voltage about 2.5V Check R810, R811 Check C815, D806,...
  • Page 18 4.Output power is unstable Unstable power Check R810, Check sampling R811, R818 Circuit Change R810, R811, R818 Check the C pin Check the R pin Change voltage of IC803 voltage of IC803 IC803 if 3V about 2.5V Check R809, R808, R814, D809 Check pin1 of Check D806, C815 if...
  • Page 19 5.Black Screen and backlight turn on Black Screen Check power supply: Power Fail Pin1, 2 of CN101 Check FB103 Check pin34, 51, 66, and 82 And U102 Of U105 Check FB106 Check pin32, 49, 56, and 75 And U101 Of U105 Check Reset (pin84) Check C144, R172 Of U105...
  • Page 20 6.White Screen White Screen LVDS Cable Workmanship Reinsert Change LVDS LVDS Cable NG Cable Check VLCD Check LVDS Panel Fail Is 5V? Signals Check Panel - Enable Check the HW Reset Check C144 Of U105 (pin48) is High? Of U105 pin84 ,R172 Check R168, R105 Q103, Q101...

  • Page 21: Bad Screen

    7. BAD SCREEN Bad Screen LVDS Cable Reinsert Workmanship Change LVDS Cable LVDS Cable NG Check Crystal:Pin96,97 Check :X101, Of U105 C153,C154 Check the communication Check: SDO,SCZ, Of U105 and U106 SCK,SDI, Reset Check the pins of U105 and U106...

  • Page 22: Wiring Diagram

    WIRING DIAGRAM...

  • Page 23: Exploded View

    EXPLODED VIEW - 23 -...

  • Page 24: Exploded View Parts List

    EXPLODED VIEW PARTS LIST Ref.No. LGE Part No. INL Part No. Description ABJ32903501 501010209600R BEZEL,FRONT(Silver cabinet),LE1957(L192WS-SNQ) ABJ32903502 501010209610R BEZEL,FRONT(Black cabinet),LE1957(L192WS-BNQ) MKC37547001 501120105100R LENS(T),LE1957(L192WS) EBU36594401 631102090821R LCP 19" MT190AW01-V2- G1,AM1900004201(INL) EBU36577201 631102090650R LCD PANEL 19"M190A1-L02(A)(CMO)ROHS EBU36576401 790841400600R PCBA,P/I BOARD,LE1957(L192WS)-610 ROHS PCBA,I/F BOARD(V2),LE1957-610 ROHS (For InnoLux Module-...

  • Page 25: Replacement Parts List

    REPLACEMENT PARTS LIST BEFORE REPLACING ANY OF THESE COMPONENTS, CAUTION: READ CAREFULLY THE SAFETY PRECAUTIONS IN THIS MANUAL. * NOTE S SAFETY Mark ALTERNATIVE PARTS Power and Inverter PCBA Board Item Location Description 790841400600R PCBA,P/I BOARD,LE1957-610 ROHS IC801, 412140002380R IC LTV817M-PR VDE (LITE-ON) P=10mm RoHS 412140001390R IC EL817M-B(EVERLIGHT)RoHS U501,U502,...
  • Page 26 511130001200R SOLDER BAR,Sn96.5/Ag3.0/Cu0.5/Ni0.06/Ge0 511110000101R HOT-MELT ADHESIVES (#526) 511110000501R SILICONE RTV RUBBER,UB-511(EURO) Item Location Description 735100005900R ASSY,H/S TOP246Y, LE1X09 ROHS IC802, 412000379270R IC TOP246YN,TO-220-7C(POWER IN TEGRATION 507200003700R HEATSINK,46x20xt10mm LE1704/05 509112306100R SCREW,P,CROSS,T.T-3*6,ZnROHS Item Location Description 735100007120R ASSY,H/S,SBR10U100CT/U40CT, LE1710 D803, 411090009480R SCHTKY SP10100C 100V/10A ITO220(WILLAS)R 411090041010R SCHTKY SRF10100 100V/10A ITO220AB(TSC)Ro D805,...
  • Page 27 411131516052R ZENER 16V 0.5W DDZ16-F,SOD123(DIODES)RoH 411131416020R ZENER 16V MMSZ5246A SOD-123(WILLAS)ROHS ZD805, 411100912020R ZENER 12V MMSZ5242A SOD123(PEC RoHS 411131512052R ZENER 12V 0.5W DDZ12C-F,SOD123 (DIODES)R 411131412020R ZENER 12V MMSZ5242A SOD-123(WILLAS)ROHS R511,R510, 414916033050R RES SMD (0603) 33Ω J,RT RoHS REV:A 100 R802,R806, 414904010050R RES SMD (1206) 10Ω...
  • Page 28 460 C523,C530, 419316820070R C SMD(0805) X7R 6800PF/50V K RoHS 470 C510,C532, 419316830060R C SMD (0603) X7R 0.068uF 50V,K RoHS 790841410600R PCBA,P/I BOARD,AI,LE1957-610 ROHS Item Location Description 790841410600R PCBA,P/I BOARD,AI,LE1957-610 ROHS 790841450600R PCBA,P/I BOARD,AI/A,LE1957-610 ROHS 790841460600R PCBA,P/I BOARD,AI/R,LE1957-610 ROHS Item Location Description 790841450600R PCBA,P/I BOARD,AI/A,LE1957-610 ROHS...
  • Page 29 170 RA 430405000000R JMPR ROLL/KG D=0.6mm,AT,RoHS 20MM 506140005700R LABEL,BARCODE,BLANK,33x7mm, ROHS,FOR PCB 700000000300R ASSY,PCB&RIVENT,LE1957 ROHS Item Location Description 790841460600R PCBA,P/I BOARD,AI/R,LE1957-610 ROHS C802,C811, 418210227030R CAP CD X7R 1000pF 500V K VT RoHS C817,C822, 419111040030R CAP MTL X7R 0.1uF 50V K,VT, RoHS C816, 416231041530R CAP MEB 0.1uF 100V J,(RSB),VT RSBEC3100D...
  • Page 30 Main PCBA Board For INL Module Item Location Description 790841300600R PCBA,I/F BOARD(V2),LE1957-610 ROHS 629030009400R PROGRAM(V2),LE1957-610 ROHS 790841320600R PCBA,I/F BOARD,MI,LE1957-610 ROHS 790841340600R PCBA,I/F BOARD,SMD,LE1957-610 ROHS 511130001201R SOLDER BAR,Sn96.5/Ag3.0/Cu0.5(SAC305 VAC 511130001200R SOLDER BAR,Sn96.5/Ag3.0/Cu0.5/Ni0.06/Ge0 506440003800R LABEL,BLANK,YELLOW,10x4mm Item Location Description 790841320600R PCBA,I/F BOARD,MI,LE1957-610 ROHS C111,C144, 420431000260R CAP EC 10uF 25V M,105℃...
  • Page 31 411020047020R DIO BAV70-LF, 70V SOT-23(FEC) ROHS 411020047090R DIO BAV70, 70V SOT-23(PEC) ROHS ZD101,ZD105,ZD106,ZD107,ZD108, 411100956920R ZENER 5.6V MMSZ5232A SOD123(PE C)RoHS 411131556920R ZENER 5.6V 0.5W DDZ5V6B-F,SOD1 23(DIODES 411131456920R ZENER 5.6V MMSZ5232A SOD-123(WILLAS)ROHS U108, 412000279480R IC AT24C04N-10SU-2.7 SOP8 4K(A TMEL)RoHS 412000279280R IC M24C04-WMN6TP4K SOP8 (ST) RoHS 412000479990R IC CAT24C04WI-TE13 SOIC-8(CATALYST)RoHS U102,...
  • Page 32 C103,C104,C106,C107,C109, C129,C156,C131,C132,C134, C135,C136,C137,C139,C141, 419311040060R C SMD(0603) X7R 0.1uF/50V K RoHS C143,C147,C148,C149,C150, C151,C152,C166, C140, 419311054070R C SMD(0805) X7R 1uF/16V K RoHS REV:A C112,C113,C114,C115,C116, 419314730060R C SMD (0603) X7R 0.047uF 50V,K RoHS C117,C118, FB101, 432002312111R BEAD CORE SMD(0805)120Ω 300mA RoHS FB102,FB103,FB105,FB106, 432002360012R BEAD CORE SMD(0805)60Ω...
  • Page 33 ZD101,ZD105,ZD106,ZD107,ZD108, 411100956920R ZENER 5.6V MMSZ5232A SOD123(PE C)RoHS 411131556920R ZENER 5.6V 0.5W DDZ5V6B-F,SOD1 23(DIODES 411131456920R ZENER 5.6V MMSZ5232A SOD-123(WILLAS)ROHS U108, 412000279480R IC AT24C04N-10SU-2.7 SOP8 4K(A TMEL)RoHS 412000279280R IC M24C04-WMN6TP4K SOP8 (ST) RoHS 412000479990R IC CAT24C04WI-TE13 SOIC-8(CATALYST)RoHS U102, 412000330830R IC AS1117L-1.8/TR-LF,SOT223(A1 SEMI)RoHS 412000330020R IC LD1117AL-1.8V-A SOT223(UTC) RoHS 412000330070R...

  • Page 34: Schematic Diagram

    SCHEMATIC DIAGRAM 1. DC to DC 2. Input...
  • Page 35 3. Scaler_TSUM16AL 4. Key Pad...
  • Page 36 5. Inverter 6. Power...
  • Page 37 Nov. 2006 P/NO:MFL36713651 Printed in China...

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