LG FLATRON L1730S; FLATRON L1930S Service Manual
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LG FLATRON L1730S; FLATRON L1930S Service Manual

Chassis no. : cl-64
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See also: User Manual
COLOR MONITOR
SERVICE MANUAL
CHASSIS NO. :
CL-64
MODEL:
(
) **Same model for Service
CAUTION
BEFORE SERVICING THE UNIT,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
MENU
LightView
SOURCE
-
+
E-mail:http://www.LGEservice.com/techsup.html
L1730S
L1930S
SET/AUTO
Website:http://biz.LGservice.com
(L1730SSFTM-AL**E)
(L1930SSFTM-AL**E)

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Summary of Contents for LG FLATRON L1730S; FLATRON L1930S

  • Page 1 Website:http://biz.LGservice.com E-mail:http://www.LGEservice.com/techsup.html COLOR MONITOR SERVICE MANUAL CHASSIS NO. : CL-64 MODEL: L1730S (L1730SSFTM-AL**E) L1930S (L1930SSFTM-AL**E) ) **Same model for Service CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. MENU LightView SOURCE SET/AUTO...

  • Page 3: Table Of Contents

    CONTENTS SPECIFICATIONS ........... 2 DESCRIPTION OF BLOCK DIAGRAM ....12 PRECAUTIONS ............3 ADJUSTMENT ............16 SERVICE PRECAUTIONS ........4 TROUBLESHOOTING GUIDE ......18 TIMING CHART ............7 EXPLODED VIEW...........22 DISASSEMBLY ............8 REPLACEMENT PARTS LIST .......24 WIRING DIAGRAM ..........10 BLOCK DIAGRAM ..........

  • 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: Service Precautions

    SERVICING PRECAUTIONS CAUTION: Before servicing receivers covered by this 9. Use with this receiver only the test fixtures specified in service manual and its supplements and addenda, read this service manual. and follow the SAFETY PRECAUTIONS on page 3 of this CAUTION: Do not connect the test fixture ground strap publication.
  • Page 6 General Soldering Guidelines Replacement 1. Use a grounded-tip, low-wattage soldering iron and 1. Carefully insert the replacement IC in the circuit board. appropriate tip size and shape that will maintain tip 2. Carefully bend each IC lead against the circuit foil pad and solder it.
  • Page 7 Circuit Board Foil Repair At Other Connections Excessive heat applied to the copper foil of any printed Use the following technique to repair the defective copper circuit board will weaken the adhesive that bonds the foil pattern at connections other than IC Pins. This technique to the circuit board causing the foil to separate from or involves the installation of a jumper wire on the "lift-off"...

  • Page 8: 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 Sort Polarity 31.469 640x350 25.175 70Hz...

  • Page 9: Disassembly

    DISASSEMBLY 1. Put a soft cushion on the floor and lay the stand on its 4. Cover the panel with your hand so that it is not scratched. side so that the base is accessible. Then, pull up the cabinet corner side. 2.
  • Page 10 7. Push the shield cap upward and disassemble it. 9. Pull out the link cable while pushing up the main frame. 8. Pull out the cable. - 9 -...

  • Page 11: Wiring Diagram

    WIRING DIAGRAM Connector Ass’y P/N: 6631T11012W Power Board Connector Ass’y P/N: J607 6631T20024C J605 Main Board J603 Control Board - 10 -...

  • Page 12: Block Diagram

    BLOCK DIAGRAM (L1730S) - 11 -...

  • Page 13: Description Of Block Diagram

    DESCRIPTION OF BLOCK DIAGRAM(L1730S) 1. Video Controller Part. This part amplifies the level of video signal for the digital conversion and converts from the analog video signalto 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 14 BLOCK DIAGRAM (L1930S) - 13 -...
  • Page 15 DESCRIPTION OF BLOCK DIAGRAM(L1930S) 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 16: 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 17: 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 18: Service Osd

    SERVICE OSD 1)Turn off the power switch at the front side of display. 2)Wait for about 5 seconds and press MENU,POWER key. 3)Shows the service OSD menu. 4)The service OSD menu contains additional menus that the User OSD menu as described below. a) CLEAR ETI : To initialize using time.

  • Page 19: Troubleshooting Guide

    TROUBLESHOOTING GUIDE 1. NO POWER NO POWER (POWER INDICATOR OFF) CHECK POWER BOARD, AND FIND OUT A SHORT POINT CHECK J603 VOLTAGE AS OPENING PIN5, PIN6 (5V)? EACH POWER LINE CHECK CHECK 5VS LINE U202 PIN 32 Voltage (OPEN CHECK) (5V) ? NO PROBLEM CHECK KEY CONTROL...
  • Page 20 2. NO RASTER (OSD IS NOT DISPLAYED) – LIPS NO RASTER (OSD IS NOT DISPLAYED) J603 PIN5, PIN6 CHECK LIPS CHECK MICOM INV ON/OFF J603 PIN9 PORT. 1. CONFIRM BRIGHTNESS J603 PIN10 OSD CONTRL STATE. 2. CHECK MICOM DIM-ADJ PORT CHECK PULSE AS CONTACTING SCOPE...
  • Page 21 3. NO RASTER (OSD IS NOT DISPLAYED) – MST9011B NO RASTER (OSD IS NOT DISPLAYED) U201 POWER PIN11, 50 CHECK U401 (3.3V)? U201 1. CHECK PIN169, 170 PIN169, 170 SOLDERING CONDITION OSCILLATE AS 2. CHECK X201 14.318MHZ? 3. TROUBLE IN U201 U201 PIN181 IS 64KHz H-SYNC? CHECK CONNECTION LINE...
  • Page 22 4. TROUBLE IN DPM TROUBLE IN DPM CHECK PC CHECK PC IS NOT GOING R629, R630 (SYNC) ? INTO DPM OFF MODE CHECK U201 PIN 81 TROUBLE IN SIGNAL CABLE (0V) ? TROUBLE IN PC - 21 -...
  • Page 23 - 22 -...

  • Page 24: Exploded View Parts List

    3091TKL108Z CABINET ASSEMBLY, L1930 BRAND L094 ("S"+F-ENG, SILVER)-LIFE IS GOOD - Australia L1930S 6304FLP086A LCD(LIQUID CRYSTAL DISPLAY), LM170E01-A5K6 LG PHILPS TFT COLOR LVDS SXGA OKI GATE D-IC -L1730S or 6304FLP110A LCD(LIQUID CRYSTAL DISPLAY), LM170E01-A5N5 LG PHILPS TFT COLOR LPL NJ,250NITS,SXGA,LVDS-L1730S...

  • Page 25: 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. 6. 08. DATE: 2004. 6. 08. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC.
  • Page 26 DATE: 2004. 6. 08. DATE: 2004. 6. 08. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION U204 0ISG240860B M24C08W6 SGS-THOMSON 8SOP R/T R421 0RJ0000D677 0 OHM 1/10 W 5% 1608 R/TP - L1730S U401 0IPMGKE011A KIA78D33F KEC DPAK R/TP 3.3V...

  • Page 27: Schematic Diagram

    SCHEMATIC DIAGRAM 1. SCALER - 26 -...
  • Page 28 2. POWER - 27 -...
  • Page 29 3. CONNECTOR - 28 -...
  • Page 30 Blank Page...
  • Page 31 Jun. 2004 P/NO : 3828TSL084Y Printed in Korea...

This manual is also suitable for:

Flatron l1930sFlatron l1730ssftm-al**eFlatron l1930ssftm-al**e

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