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LG FLATRON W1943SB Service Manual
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LG FLATRON W1943SB Service Manual

Xx * means sales region and module type (axxiap: inl 5ms, axxvap: auo 5ms)
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See also: Service Manual , Owner's Manual

COLOR MONITOR

SERVICE MANUAL

CHASSIS NO. :
MODEL:
(W1943SB-PFI Axx*AP)
xx * means sales region and module type
(AxxIAP: INL 5ms, AxxVAP: AUO 5ms)
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
Copyright ©2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Website:http://biz.LGservice.com
E-mail:http://www.LGEservice.com/techsup.html
W1943SB
1
*To apply the MSTAR Chip.
LGE Internal Use Only

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Summary of Contents for LG FLATRON W1943SB

  • Page 1: Color Monitor

    (AxxIAP: INL 5ms, AxxVAP: AUO 5ms) CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. *To apply the MSTAR Chip. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 2: Table Of Contents

    4. Max. Resolution D-sub Analog: 1360X768@60HZ 5. POWER SUPPLY 5-1. Power: 90 ~ 264 Vac / 50 ~ 60 Hz 5-2. Power Consumption Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 3 7. DIMENSIONS (with TILT/SWIVEL) Width: 446.7mm Depth: 183.0mm(W Base),159.3mm(W/O Base) Height:: 374.3mm(W Base),357.3mm(W/O Base) 8. WEIGHT (with TILT/SWIVEL) Net. Weight : 3.29+/-0.5Kg（AUO）;3.31+/-0.5Kg(INL) Gross Weight: 4.64+/-0.5Kg(AUO);4.66+/-0.5Kg(INL) Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 4: Precautions

    (Cleaning with a dirty or rough cloth may damage the panel.) CAUTION Please use only a plastic screwdriver to protect yourself from shock hazard during service operation. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 5: Servicing Precautions

    8. Always connect the test receiver ground lead to the receiver chassis ground before connecting the test receiver positive lead. Always remove the test receiver ground lead last. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 6 (or with the replaced component and adjacent components solder braid) before removing the IC. and the circuit board prevent excessive component temperatures. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 7 Solder the overlapped area and clip off any excess jumper wire. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 8: Timing Chart

    1024 x 65.0 V(Lines) 60.0 H(Pixels) 60.123 1312 1024 1024 x 78.75 V(Lines) 75.029 H(Pixels) 47.712 1792 1360 1360 85.5 x768 V(Lines) Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 9: Disassembly

    DISASSEMBLY Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 10 Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 11: Block Diagram

    The Micom distinguishes polarity and frequency of the H/V sync are supplied from signal cable. The controlled data of each modes is stored in Flash. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 12: Lips Board Block Diagram

    This part function is to collect the any change from the dc output and feed back to the primary through photo transistor. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 13: Adjustment

    Use different cables for VGA To connect DDC card and monitor. Figure 1 Figure 2 4. EDID Writing SOP: a. Select “File＂ submenu，select “Auto Write”, fix light mark in S/N column. Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 14: Only For Training And Service Purposes

    Select “Model” of main menu. Password: 1234 c. Select written model W1943SB Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 15: Service Osd

    R/G/B-Gain : Allows you to set the R/G/B-Gain value manually.(Analog Only) l)RS232: Enable/Disable Debug Mode(on/off) m)SRGB:Allows you to set the sRGB value manually Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 16: Troubleshooting Guide

    C816/C818 Check primary rectifier Check voltage of C804 D801/L801/F801 Check PIN6 of IC802 is Check 16V or not? T801/IC801/C811 Check R810/R811/R814 Q804/IC802 Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 17 Check PIN8 of IC501 Check I/F BD R504/C506 Check PIN11/14 of IC501 Check ,It have output or not? IC501/R508 Check T501/U501 /C514/C516/C517 Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 18 3. DC output voltage is unstable Output voltage unstable Check Check IC803R IC803/R830/R824 Pin voltage /R823 Replace NG Check IC801/R825 component Check T801/D803/ZD806 Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 19: Output Power Is Unstable

    High when backlight turn on > /R510/D504 Check PIN11/16 of IC501 CheckC516/C517/ It is over 16V or not ? D501 Check T501/C514/IC501 Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 20 5. Black Screen and backlight turn on Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 21: White Screen

    Is 5V signal Check panel Check H/W CheckR149,C1 Enable Pin28 of Reset:Pin5 64,R513,R151 U105 is high? 4 of U105 Check R107,R108 R109,Q101,Q104 Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 22: Bad Screen

    7. BAD SCREEN Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 23: Wiring Diagram

    WIRING DIAGRAM Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 24: Exploded View And Parts List

    Exploded View and Parts List Copy right LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 25 430300803070R HRN LVDS FFC 30P 166MM W/TASTE COV30101101 430303002550R CUSHION_L,W1943 AGG72931101 506060018400R CUSHION_R,W1943 AGG72931102 506060018401R CARTON LG W1943 W/W Type MAY61869601 506020032000R Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

  • Page 26: Schematic Diagram

    SCHEMATIC DIAGRAM 1. DC to DC Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 27 2. Input Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 28 3. Scaler_TSUM1PFR Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 29 4. Keypad Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 30 5. Inverter Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 31 6. Power Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
  • Page 32 . 2009 P/NO: Printed in China Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...

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