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LG L1933TR-SF - - 19" LCD Monitor Service Manual
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LG L1933TR-SF - - 19" LCD Monitor Service Manual

LG L1933TR-SF - - 19" LCD Monitor Service Manual

Service manual
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COLOR MONITOR
SERVICE MANUAL
CHASSIS NO. : LM57B
MODEL:
(
) **Same model for Service
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
L1733TR (L1733TR-SFQ.A**MQP)
L1933TR (L1933TR-SFQ.A**MQP,A**RQP)
Internal Use Only
Website:http://biz.LGservice.com
*To apply the MSTAR Chip.

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Summary of Contents for LG L1933TR-SF - - 19" LCD Monitor

  • Page 1 Internal Use Only Website:http://biz.LGservice.com COLOR MONITOR SERVICE MANUAL CHASSIS NO. : LM57B MODEL: L1733TR (L1733TR-SFQ.A**MQP) L1933TR (L1933TR-SFQ.A**MQP,A**RQP) ) **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

    : 4.6 kg (10.14 lbs) L1933T Net. Weight : 4.4 kg (9.70 lbs) Gross Weight : 5.6 kg (12.35 lbs) LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 2 - Only for training and service purposes...

  • Page 3: Precautions

    CAUTION Please use only a plastic screwdriver to protect yourself from shock hazard during service operation. LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 3 - Only for training and service purposes...

  • Page 4: 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. LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 4 - Only for training and service purposes...
  • Page 5 IC. circuit board to prevent excessive component temperatures. LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 5 - Only for training and service purposes...
  • Page 6 Solder the overlapped area and clip off any excess jumper wire. LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 6 - Only for training and service purposes...

  • Page 7: Timing Chart

    1280 x 1024 V(Lines) 60.02 1066 1024 H(Pixels) 135.0 79.976 1688 1280 1280 x 1024 V(Lines) 75.035 1066 1024 LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 7 - Only for training and service purposes...

  • Page 8: Disassembly

    Hold the head & stand base and then Pull up the stand part. Twist Stand until "Click". # 4-2 Separate head & stand LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 8 - Only for training and service purposes...
  • Page 9 Remove the screws. 2. Then, let the all latches are separated.(#3-1~3-2) 3. Put the front face down. Disassemble back cover. LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 9 - Only for training and service purposes...
  • Page 10 Separate Stand Body & Base. (Reference the #1-2) After finished repair, necessarily push 4ea Latches to inside for restoration. LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 10 - Only for training and service purposes...
  • Page 11 Confirm two latch of right and left. Push the latch to the inside. Push the base to the opposite direction. Confirm the condition of separation. LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 11 - Only for training and service purposes...

  • Page 12: Block Diagram

    BLOCK DIAGRAM Module D-Sub DVI-D LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 12 - Only for training and service purposes...
  • Page 13 BLOCK DIAGRAM-POWER LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 13 - Only for training and service purposes...

  • Page 14: Description Of 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 EEPROM. LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 14 - Only for training and service purposes...

  • Page 15: 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. LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 15 - Only for training and service purposes...

  • Page 16: Adjustment

    Click “ Write” button c) Remove all default number d) Add 300-3FF e) Click Start button. f) Click Exit button. LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 16 - Only for training and service purposes...

  • Page 17: Service Osd

    (110V/220V) 74LS06 Power LED 4.7K 74LS06 ST Switch V-Sync On/Off Switch (Switch must be ON.) Figure 1. Cable Connection LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 17 - Only for training and service purposes...

  • Page 18: Troubleshooting Guide

    Is U201 Pin75 (3.3V) Check 3.3V Line Voltage ? Check U201 Pin 96 Check X-TAL Pulse Check U201 Waveforms U201-#96 LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 18 - Only for training and service purposes...
  • Page 19 (CONTACT PROBE TO CAUTION LABEL. CAN YOU SEE PULSE AT YOUR SCOPE? REPLACE CCFL LAMP IN THE LCD MODULE LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 19 - Only for training and service purposes...
  • Page 20 AT SIGNAL PINS? AT MODE 12? TROUBLE IN CABLE OR LCD MODULE Waveforms 2 U201-#28 V-SYNC U201-#96, 97 U201-#27 H-SYNC LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 20 - Only for training and service purposes...
  • Page 21 U201 PIN 27,28 CHECK H/V SYNC LINE SYNC PULSE ? TROUBLE IN U201 Waveforms 3 R443 V-Sync R442 H-Sync LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 21 - Only for training and service purposes...
  • Page 22 Check Q101 Drain Trouble in Q101 Waveform Check D201, D202 Trouble in D201, D202 Voltage CHECK 5V, 12V Line LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 22 - Only for training and service purposes...
  • Page 23 If waveform is no problem Check Q303~Q308 Check U303, U304 Or Trouble in U303, U304 Drain waveform CHECK T301, T302 LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 23 - Only for training and service purposes...

  • Page 24: Wiring Diagram

    WIRING DIAGRAM 6631900109A 6631T20023J 6631900011H 6631T20010E-L1733TR 6631900125A-L1933TR LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 24 - Only for training and service purposes...

  • Page 25: Exploded View

    EXPLODED VIEW LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 25 - Only for training and service purposes...

  • Page 26: Exploded View Parts List

    LCD,Module-TFT, LM190E08-TLB6 DRIVER 17.0INCH 1280X1024 300CD COLOR 72% 4/3 800:1 P7, Lusem/Lusem D-IC, 5ms LG PHILIPS LCD or EAJ32188901 LCD,Module-TFT, LM190E08-TLB5 DRIVER 19INCH 1280X1024 300CD COLOR 72% 5/4 800 : 1 P4 FACTORY 5MS, 2CH-LVDS, 160/160, 4LAMP LG PHILIPS LCD . 6304FHS014B...

  • Page 27: Replacement Parts List

    0603B104K160CT 100nF 10% 16V U501 0IPRP00784A FE251MOH-LF(TSUMO56WHJ-LF) 3 C714 0CC680CK41A C1608C0G1H680JT 68pF 5% 50V U502 EAN30510505 L1952HQ-SFQ ARDRQP TSUMO G LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 27 - Only for training and service purposes...
  • Page 28 SMAW200-03P 3P 2.00MM 1R ANG R712 0RJ0102D677 MCR03EZPJ100 10OHM 5% 1/10W LED1 EAV30486601 BL-BY0BK201G-AB-LC4.5 ROUND R713 0RJ0102D677 MCR03EZPJ100 10OHM 5% 1/10W LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 28 - Only for training and service purposes...
  • Page 29 62K OHM 1/8 W 1% 2012 R/TP D401 0DSDI00038A "BAV99-(F),LF DIODES R/TP SOT" R315 0RH2001D622 2K OHM 1 / 10 W 2012 5.00% D LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 29 - Only for training and service purposes...
  • Page 30 P404 6630V90218A "35001WR YEONHO 2P 3.5MM DIP," 971-0016 TIN HDC 0.60H NON NON 971-0016 TIN HDC 0.60H NON NON LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 30 - Only for training and service purposes...

  • Page 31: Schematic Diagram

    SCHEMATIC DIAGRAM 1. SCALER LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 31 - Only for training and service purposes...
  • Page 32 2. POWER & WAFER LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 32 - Only for training and service purposes...
  • Page 33 3. INVERTER LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 33 - Only for training and service purposes...
  • Page 34 4. POWER LGE Internal Use Only Copyright 2007 LG Electronics. Inc. All right reserved. - 34 - Only for training and service purposes...
  • Page 35 Feb. 2007 P/NO : MFL43002807 Printed in Korea...

This manual is also suitable for:

Flatron l1733trFlatron l1933tr

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