LG Flatron LCD 575LE Service Manual
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LG Flatron LCD 575LE Service Manual

LG Flatron LCD 575LE Service Manual

Color monitor
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COLOR MONITOR

SERVICE MANUAL

CHASSIS NO. : CL-18
FACTORY MODEL: LB565T
MODEL:
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
LCD 575LE
(LB565T-EA)

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Summary of Contents for LG Flatron LCD 575LE

  • Page 1: Color Monitor

    COLOR MONITOR SERVICE MANUAL CHASSIS NO. : CL-18 FACTORY MODEL: LB565T MODEL: LCD 575LE (LB565T-EA) CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.

  • Page 2: Table Of Contents

    CONTENTS SPECIFICATIONS ........... 2 ADJUSTMENT ............9 PRECAUTIONS ............3 TROUBLESHOOTING GUIDE ......10 TIMING CHART ............4 PRINTED CIRCUIT BOARD........14 OPERATING INSTRUCTIONS ........ 5 EXPLODED VIEW...........17 WIRING DIAGRAM ..........6 REPLACEMENT PARTS LIST .......19 BLOCK DIAGRAM ........... 7 PIN CONFIGURATION..........23 DESCRIPTION OF BLOCK DIAGRAM.....8 SCHEMATIC DIAGRAM .........

  • Page 3: Precautions

    PRECAUTION WARNING FOR THE SAFETY-RELATED COMPONENT. WARNING 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) or marked on the schematic diagram and the inverter circuit, must disconnect the AC adapter...

  • Page 4: Timing Chart

    TIMING CHART VIDEO SYNC Total Video Blanking Sync Back Front Sync Frequency MODE H / V Resolution Period Active Time Duration Porch Porch Polarity Clock ( E ) Time ( A ) ( B ) ( D ) ( F ) ( C ) 25.175 31.468 KHz...

  • Page 5: Operating Instructions

    OPERATING INSTRUCTIONS FRONT VIEW REAR VIEW DC Power Connecter D-Sub Signal Connector Stand Cover Power ON/OFF Button Front Control Panel Power (DPMS) Indicator Front Control Panel Power ON/OFF Button OSD Selection/Adjustment Power (DPMS) Indicator OSD Buttons AUTO/SET Buttons Buttons 1. Power ON/OFF Button 4.

  • Page 6: Wiring Diagram

    Connector Ass’y P/N: 6631T11012R Connector Ass’y P/N: 6631T12002B Connector Ass’y P/N: 6631T20015J Connector Ass’y P/N: 6631T20013H...

  • Page 7: Block Diagram

    MICOM EEPROM (MTV212M) 24LC16 Schmitt Trigger (74HCT14A) ST5V Hsyncm Control Hsync2 Vsync2 Vsyncm Interface LVDS ADC/PLL/Scaler 20Pin (LVDS83) (gmZAN1) RCLK Connector (DF14A-20P) +3.3V 3.3VD Regulator Inverter 3.3V_AD 3.3VD 3.3V_PL BA033 3.3V_AD Regulator Switch BA033 ST5V FDC6325L 3.3V_PL DC/DC Regulator ST5V BA033 Converter +3.3V...

  • Page 8: Description Of Block Diagram

    DESCRIPTION OF BLOCK DIAGRAM 1. Scaler One chip IC(GMZAN1, U3) GMZAN1 (U3) is one chip IC which it supports four internal function blocks of Video Amp, PLL, A/D converter and Video processor. Video signal (0.7Vp.p) clamped through C44, 45, 191 with matching IC’s proper cut off voltage. This signal is processed as a proper 8 bit digital signal by U3’s amplifying, phase locking, A/D converting, and scaling operations.

  • Page 9: Adjustment

    ADJUSTMENT All adjustment are thoroughly checked and corrected 2. Adjustment for White Balance when the monitor leaves the factory, but sometimes 1) Display color 0,0 pattern at Mode 12. several minor adjustment may be required. 2) Set External Bright to MAX position and Contrast to Adjustment should be following procedure and after MAX Position.

  • Page 10: Troubleshooting Guide

    TROUBLESHOOTING GUIDE 1. NO POWER NO POWER (POWER INDICATOR OFF) CHECK ADAPTER, AND FIND OUT CHECK J1’S A SHORT POINT VOLTAGE AS OPENING (12V) ? EACH POWER LINE CHECK CHECK U4. U4 PIN 8 VOLTAGE (5V) ? CHECK CHECK L11 U5 Voltage (OPEN CHECK) (5V) ?
  • Page 11 2. NO RASTER (OSD IS NOT DISPLAYED) – INVERTER NO RASTER (OSD IS NOT DISPLAYED) J4 PIN10 CHECK ADAPTER 12V? CHECK MICOM INV J4 PIN5 ON/OFF PORT. 1. CONFIRM BRIGHTNESS OSD CONTRL STATE. J4 PIN1 2. CHECK MICOM DIM-ADJ PORT CHECK PULSE AS CONTACTING SCOPE...
  • Page 12 3. NO RASTER (OSD IS NOT DISPLAYED) – gmzanl NO RASTER (OSD IS NOT DISPLAYED) POWER PINS CHECK U2, U24 3.3V? 1. CHECK PIN141, 142 U3 PIN141, 142 SOLDERING CONDITION OSCILLATE AS 14.3M? 2. CHECK X2 3. TROUBLE IN U3 PIN2 IS 65MHz CLOCK? CHECK U5’S SOLDERING PIN4 IS 48KHz H-SYNC?
  • Page 13 4. NO RASTER (OSD IS DISPLAYED) – gmzanl NO RASTER (OSD IS DISPLAYED) POWER PIN CHECK U2, U24 3.3V? 1. CHECK PC CHECK 2. CHECK SIGNAL CABLE R,G,B INPUT? & D-SUB CONNECTOR U3 PIN 87, 91, 95 LINE CHECK CHECK H-SYNC LINE H-SYNC INPUT (D-SUB→U6→MICOM U3 PIN 150?

  • Page 14: Printed Circuit Board

    C301 C302 C306 C305 C304 C102 C101 C152 C151 C110 MODEL:LB565C P/N :6870T375A10-1 DATE :2001.06.21 C130 C133 C136 C139 C129 C240 C236 C235 C239 C230 C237 C135 SOLDERING DIRECTION...
  • Page 15 C191...
  • Page 16 P/N :6870T245C11 DATE :2000.05.02...

  • Page 17: Exploded View

    EXPLODED VIEW...

  • Page 18: Exploded View Parts List

    SCREW, DRAWING, PVS+4*10(MSWR/BK) 332-105G ADAPTER, AC-DC, LSE0107A1236 LISHIN 12V 3.0A FOR LG 6634B00046A ADAPTER, AC-DCADP-36UB DELTA 12V 3.0A FOR LG FOR JAPAN 6634TBZ016A CABLE,D-SUB, UL 2990-9C(7.5) DT 1870MM PANTONE BLUE(661C) LV501A DM 6866TD9001G SIGNAL CABLE, UL 2990-9C(7.5) DT 1870MM GRAY(85964) LB500 DM FOR JAPAN...

  • Page 19: Replacement Parts List

    REPLACEMENT PARTS LIST CAUTION: BEFORE REPLACING ANY OF THESE COMPONENTS, READ CAREFULLY THE SAFETY PRECAUTIONS IN THIS MANUAL. * NOTE SAFETY Mark AL ALTERNATIVE PARTS DATE: 2002. 4. 29. DATE: 2002. 4. 29. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC.
  • Page 20 DATE: 2002. 4. 29. DATE: 2002. 4. 29. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C150 0CH8107F611 100UF 16V M 85STD(CYL) R/TP 6210TCE001P HB-1S2012-121JT CERATECH 2012M C151 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R 6210TCE001P HB-1S2012-121JT CERATECH 2012M C152...
  • Page 21 DATE: 2002. 4. 29. DATE: 2002. 4. 29. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION 0RJ4701D677 4.7K OHM 1/10 W 5% 1608 R/TP 0CH3104K566 0.1UF 50V K X 2012 R/TP 0RJ4701D677 4.7K OHM 1/10 W 5% 1608 R/TP 0CH8107F611...
  • Page 22 DATE: 2002. 4. 29. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION 0RH1502D622 15K 1/10W 5 D.R/TP 0RH1502D622 15K 1/10W 5 D.R/TP 0RH8200D622 820 1/10W 5 D.R/TP 0RH1501D622 1.5K OHM 1 / 10 W 2012 5.00% D 0RH2201D622 2.2K 1/10W P-TYPE TAPPING 0RH8200D622 820 1/10W 5 D.R/TP 0RH1501D622...

  • Page 23: Pin Configuration

    PIN CONFIGURATION CAT24WC08J-TE13 8P BLOCK DIAGRAM DIP Package(p) SOIX Package(J) EXTERNAL LOAD V CC V CC SENSE AMPS D OUT SHIFT REGISTERS V SS V SS V CC COLUMN V SS WORD ADDRESS DECODERS BUFFERS TSSOP Package(U) START/STOP LOGIC V CC E PROM XDEC V SS...

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