LG Flatron L1910B Service Manual
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LG Flatron L1910B Service Manual

Color monitor
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COLOR MONITOR

SERVICE MANUAL

CHASSIS NO. :
CL-62
MODEL:
(
) **Same model for Service
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
L1810B
Website:http://biz.LGservice.com
E-mail:http://www.LGEservice.com/techsup.html
L1910B
(L1910BM-AF**R)
*To apply the Mstar Chip.

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Summary of Contents for LG Flatron L1910B

  • Page 1: Color Monitor

    Website:http://biz.LGservice.com E-mail:http://www.LGEservice.com/techsup.html COLOR MONITOR SERVICE MANUAL CHASSIS NO. : CL-62 MODEL: L1910B (L1910BM-AF**R) ) **Same model for Service CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. L1810B *To apply the Mstar Chip.
  • Page 2 - 1 -...

  • Page 3: Table Of Contents

    CONTENTS SPECIFICATIONS ........... 2 DESCRIPTION OF BLOCK DIAGRAM....10 PRECAUTIONS ............4 ADJUSTMENT ............12 TIMING CHART ............5 TROUBLESHOOTING GUIDE ......13 OPERATING INSTRUCTIONS ........ 6 EXPLODED VIEW...........18 WIRING DIAGRAM ..........8 REPLACEMENT PARTS LIST .......20 BLOCK DIAGRAM ........... 9 SCHEMATIC DIAGRAM .........

  • Page 4: Signal Connector Pin Assignment

    Signal Connector Pin Assignment • DVI-D Connector Signal (DVI-D) Signal (DVI-D) T. M. D. S. Data2- Hot Plug Detect T. M. D. S. Data2+ T. M. D. S. Data0- T. M. D. S. Data0+ T. M. D. S. Data2/4 Shield T.

  • Page 5: 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 6: Timing Chart

    TIMING CHART VIDEO SYNC << Dot Clock (MHz), Horizontal Frequency (kHz), Vertical Frequency (Hz), Horizontal etc... (µs), Vertical etc... (ms) >> Total Period Video Active Time Front Porch Sync Duration Back Porch Sync Mode Resolution Frequency Clock Polarity Sort 31.469 640x350 25.175 70Hz...

  • Page 7: Operating Instructions

    OPERATING INSTRUCTIONS FRONT VIEW REAR VIEW L1810B D-Sub Signal Connect DVI Connect Front Control Panel USB Port Power Connect Front Control Panel LightView 1. Power ON/OFF Button 4. MENU Button Use this button to turn the monitor on or off. Use this button to enter or exit the On Screen Display.

  • Page 8: Usb Connection

    CONTROLS LOCKED/UNLOCKED : MENU and This function allows you to secure the current control settings, so that they cannot be inadvertently changed. Press and hold the MENU button and button for 3 seconds: the message “CONTROLS LOCKED” appears. You can unlock the OSD controls at any time by pushing the MENU button and button for 3 seconds: the message “CONTROLS UNLOCKED”...

  • Page 9: Wiring Diagram

    WIRING DIAGRAM 6631T20023A Connector Ass’y P/N: Connector Ass’y P/N: CN105 CN104 6631T11012W CN002 J705 J702 J706 CN102 CN103 Connector Ass’y P/N: 6631T20022E - 8 -...

  • Page 10: Block Diagram

    BLOCK DIAGRAM - 9 -...

  • 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.

  • Page 12: Lips Board Block Diagram

    LIPS Board Block Diagram 50 ~ 60Hz 100KHz HVDC INPUT RECTIFIER ENERGY OUTPUT RECTIFIER COMPONENTS AND FILTER TRANSFER AND FILTER LINE 100 ~ 240V SIGNAL PWM CONTROL PHOTO-COUPLER COLLECT- CIRCUIT ISOLATION PRIMARY SECONDARY 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.

  • 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 3 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) MODULE : To select applied module.

  • Page 15: Troubleshooting Guide

    TROUBLESHOOTING GUIDE 1. NO POWER NO POWER (POWER INDICATOR OFF) CHECK POWER BOARD, AND FIND CHECK J705 OUT A SHORT POINT VOLTAGE PIN5, PIN6 (5V)? AS OPENING EACH POWER LINE CHECK CHECK 5VS LINE U501 PIN 8 Voltage (OPEN CHECK) (5V) ? NO PROBLEM CHECK KEY CONTROL...
  • Page 16 2. NO RASTER (OSD IS NOT DISPLAYED) – LIPS NO RASTER (OSD IS NOT DISPLAYED) J705 PIN5, PIN6 CHECK LIPS CHECK MICOM INV J705 PIN 9 ON/OFF PORT. 1. CONFIRM BRIGHTNESS OSD CONTRL STATE. J705 PIN10 2. CHECK MICOM DIM-ADJ PORT CHECK PULSE AS...
  • Page 17 3. NO RASTER (OSD IS NOT DISPLAYED) – MST9131B NO RASTER (OSD IS NOT DISPLAYED) U201 POWER PIN 8, 114 CHECK U801 (3.3V)? 1. CHECK PIN122, 123 U201 SOLDERING CONDITION PIN122, 123 OSCILLATE AS 2. CHECK X501 12MHZ? 3. TROUBLE IN U201 U501 PIN43 IS 64KHz H-SYNC? CHECK CONNECTION LINE...
  • Page 18 4. TROUBLE IN DPM TROUBLE IN DPM CHECK CHECK PC R756, R760 PC IS NOT GOING (SYNC) ? INTO DPM OFF MODE CHECK CHECK H/V SYNC U501 PIN 43.44 LINE SYNC PULSE? TROUBLE IN U501 - 17 -...
  • Page 19 - 18 -...

  • Page 20: Exploded View Parts List

    CABINET ASSEMBLY, L1910B BRAND TKL067 PC+ABS TCO03, USA/CANADA 3091TKL096S CABINET ASSEMBLY, L1910BM BRAND TKL067 BK VERSION PC+ABS TCO99 , USA/CANADA 6304FLP075A LCD(LIQUID CRYSTAL DISPLAY) , LM190E01-C4 LG PHILPS TFT COLOR 4LAMP 250NIT 3809TKL051A BACK COVER ASSEMBLY, L191OB,P L053 BRAND HF350U(87074) 3809TKL051K...

  • Page 21: 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: 2004. 3. 24. DATE: 2004. 3. 24. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC.
  • Page 22 DATE: 2004. 3. 24. DATE: 2004. 3. 24. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION D804 0DD184009AA KDS184 TP KEC - 85V - - - 300 R527 0RJ1000D677 100 OHM 1/10 W 5% 1608 R/TP D805 0DD184009AA KDS184 TP KEC - 85V - - - 300...
  • Page 23 DATE: 2004. 3. 24. DATE: 2004. 3. 24. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R772 0RJ0122D677 12 OHM 1/10 W 5% 1608 R/TP IC802 0ITI204200B TPS2042ADR TEXAS INSTRUMENT 8 R773 0RJ0122D677 12 OHM 1/10 W 5% 1608 R/TP...

  • Page 24: Schematic Diagram

    SCHEMATIC DIAGRAM 1. SCALER - 23 -...
  • Page 25 2. MICOM - 24 -...
  • Page 26 3. POWER - 25 -...
  • Page 27 4. CONNECTOR/JACKS - 26 -...
  • Page 28 Mar. 2004 P/NO : 3828TSL095L Printed in Korea...

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