LG FLATRON L1910P Service Manual
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LG FLATRON L1910P Service Manual

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COLOR MONITOR

SERVICE MANUAL

CHASSIS NO. :
CL-42
MODEL:
(
) **Same model for Service
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
Website:http://biz.LGservice.com
E-mail:http://www.LGEservice.com/techsup.html
L1910P
(L1910PL-AF**R)
*To apply the Mstar Chip.

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Summary of Contents for LG FLATRON L1910P

  • Page 1: Color Monitor

    Website:http://biz.LGservice.com E-mail:http://www.LGEservice.com/techsup.html COLOR MONITOR SERVICE MANUAL CHASSIS NO. : CL-42 MODEL: L1910P (L1910PL-AF**R) ) **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 ADJUSTMENT ............13 PRECAUTIONS ............4 TROUBLESHOOTING GUIDE ......14 TIMING CHART ............5 PRINTED CIRCUIT BOARD........18 OPERATING INSTRUCTIONS ........ 6 EXPLODED VIEW...........21 WIRING DIAGRAM ..........9 REPLACEMENT PARTS LIST .......23 BLOCK DIAGRAM ..........10 PIN CONFIGURATION..........27 DESCRIPTION OF BLOCK DIAGRAM....11 SCHEMATIC DIAGRAM .........

  • Page 3: Signal Connector Pin Assignment

    Signal Connector Pin Assignment • DVI-I Connector (Digital/Analog) Signal (DVI-I) Signal (DVI-I) 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 4: 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 5: 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 6: Operating Instructions

    OPERATING INSTRUCTIONS FRONT VIEW REAR VIEW D-Sub Signal Connect DVI Connect Stand Lock Power Connect Front Control Panel USB Port 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 7: Positioning Your Display

    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 8: Usb Connection

    Making use of USB (Universal Serial Bus)* USB (Universal Serial Bus) is an innovation in connecting your different desktop peripherals conveniently to your computer. By using the USB, you will be able to connect your mouse, keyboard, and other to your monitor instead of having to connect them to your computer.

  • Page 9: Wiring Diagram

    WIRING DIAGRAM 6631T20023E 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 - 9 -...

  • Page 10: Block Diagram

    BLOCK DIAGRAM - 10 -...

  • Page 11: Description Of Block Diagram

    DESCRIPTION OF BLOCK DIAGRAM 1. Video Controller Part & Display Data Transmitter Part.(MST9151) 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.

  • 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 High Voltage output INVERTER CIRCUIT Operation description_LIPS 1.

  • Page 13: Adjustment

    ADJUSTMENT All adjustment are thoroughly checked and corrected when the monitor leaves the factory, but sometimes several minor adjustment may be required. Adjustment should be following procedure and after warming up for a minimum of 10 minutes. • Alignment appliances and tools. - IBM compatible PC - Programmable Signal Generator.

  • Page 14: Troubleshooting Guide

    TROUBLESHOOTING GUIDE 1. NO POWER NO POWER (POWER INDICATOR OFF) CHECK POWER BOARD, AND FIND CHECK J709 OUT A SHORT POINT VOLTAGE PIN5, PIN6 (5V)? AS OPENING EACH POWER LINE CHECK U803 PIN 3 CHECK U803. VOLTAGE (5V) ? CHECK CHECK 5VS LINE U804 PIN 3 Voltage (OPEN CHECK)
  • Page 15 2. NO RASTER (OSD IS NOT DISPLAYED) – LIPS NO RASTER (OSD IS NOT DISPLAYED) J705 PIN5, PIN 6 CHECK LIPS CHECK MICOM INV J705 PIN9 ON/OFF PORT. 1. CONFIRM BRIGHTNESS OSD CONTRL STATE. J705 PIN7 2. CHECK MICOM DIM-ADJ PORT CHECK PULSE AS...
  • Page 16 3. NO RASTER (OSD IS NOT DISPLAYED) – MST9151 NO RASTER (OSD IS NOT DISPLAYED) U201 POWER PINS CHECK U804, U803 3.3V/2.5V? 1. CHECK PIN122, 123 U201 SOLDERING CONDITION PIN122, 123 OSCILLATE AS 2. CHECK X501 12MHZ? 3. TROUBLE IN U201 U501 PIN41 IS 64KHz H-SYNC? CHECK CONNECTION LINE...
  • Page 17 4. TROUBLE IN DPM TROUBLE IN DPM CHECK CHECK PC R734, R741 PC IS NOT GOING (SYNC) ? INTO DPM OFF MODE CHECK U501 PIN 11, 12 TROUBLE IN WAVEFORM X501 (12MHz) ? CHECK TROUBLE IN U501 PIN 24 SIGNAL CABLE (0V) ? TROUBLE IN PC - 17 -...

  • Page 18: Printed Circuit Board

    PRINTED CIRCUIT BOARD 1. MAIN BOARD (Component Side) - 18 -...
  • Page 19 2. POWER BOARD (Component Side) 3. POWER BOARD (Solder Side) - 19 -...
  • Page 20 4.USB BOARD 5. CONTROL BOARD LED1 INPUT MENU DOWN LEFT RIGHT SET/AUTO POWER - 20 -...
  • Page 21 - 21 -...

  • Page 22: Exploded View

    EXPLODED VIEW PARTS LIST Description Ref. No. Part No. CABINET ASSEMBLY, L1910PL BRAND L067 HF350U SILVER 3091TKL072E LCD(LIQUID CRYSTAL DISPLAY), FLC48SXC8V-10 FUJITSU TFT COLOR SXGA 8BIT LVDS MVA 6304FFT002A BACK COVER ASSEMBLY. L191OB,P L053 BRAND HF350U(87074) 3809TKL051A TILT SWIVEL ASSEMBLY, L1910PL , HF350U 87074 3043TKK086K PWB(PCB) ASSEMBLY, SUB, L1910 L1810 CONTROL TOTAL BRAND CONTROL 6871TST415A...

  • Page 23: 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: 2003. 6. 19. DATE: 2003. 6. 19. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC.
  • Page 24 DATE: 2003. 6. 19. DATE: 2003. 6. 19. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION D716 0DS226009AA KDS226 TP KEC SOT-23 80V 300 R215 0RJ0752D677 75 OHM 1/10 W 5% 1608 R/TP D717 0DS226009AA KDS226 TP KEC SOT-23 80V 300...
  • Page 25 DATE: 2003. 6. 19. DATE: 2003. 6. 19. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION CONTROL BOARD R724 0RJ0332D677 33 OHM 1/10 W 5% 1608 R/TP R725 0RJ4701D677 4.7K OHM 1/10 W 5% 1608 R/TP LED1 0DLLT0208AA LITEON LTST-C155KGJSKT R/TP G...
  • Page 26 DATE: 2003. 6. 19. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION 0RJ1502D677 15K OHM 1/10 W 5% 1608 R/TP 0RJ0222D677 22 OHM 1/10 W 5% 1608 R/TP 0RJ0222D677 22 OHM 1/10 W 5% 1608 R/TP 0RJ1501D677 1.5K OHM 1/10 W 5% 1608 R/TP 0RJ1501D677 1.5K OHM 1/10 W 5% 1608 R/TP 0RJ1002D677...

  • Page 27: Pin Configuration

    PIN CONFIGURATION MST9151 DUAL MSTAR 128P PIN DIAGRAM VSYNC1 AVSS_PLL AVSS_DVI Pin 1 AVSS_DVI LVB0M LVB0P AVDD_DVI GNDP VDDP LVB1M AVSS_DVI LVB1P LVB2M LVB2P AVDD_DVI LVBCKM REXT LVBCKP AVDD_PLL LVB3M AVSS_PLL LVB3P AVDD VDDC AVSS GNDC BIN1 GNDP BIN1M VDDP SOGIN1 LVA0M GIN1...

  • Page 28: Schematic Diagram

    SCHEMATIC DIAGRAM 1. SCALER - 28 -...
  • Page 29 2. MICOM - 29 -...
  • Page 30 3. POWER - 30 -...
  • Page 31 4. CONNECTOR/JACKS - 31 -...
  • Page 32 5. KEY PART - 32 -...
  • Page 33 6. USB - 33 -...
  • Page 34 7. LIPS - 34 -...
  • Page 35 8. LIPS - 35 -...
  • Page 36 Jul. 2003 P/NO : 3828TSL095C Printed in Korea...

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