LG Flatron L1970HR Service Manual
Color monitor
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Also See for Flatron L1970HR:
- User manual (36 pages) ,
- Service manual (28 pages) ,
- User manual (23 pages)
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Table of Contents
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Summary of Contents for LG Flatron L1970HR
- Page 1 Website:http://biz.LGservice.com E-mail:http://www.LGEservice.com/techsup.html COLOR MONITOR SERVICE MANUAL CHASSIS NO. : LM62A MODEL: L1970HR (L1970HR-BFR.A**RQP) ) **Same model for Service CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
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Page 2: Table Of Contents
CONTENTS SPECIFICATIONS ........... 2 SERVICE OSD ............13 PRECAUTIONS ............3 TROUBLESHOOTING GUIDE ......14 TIMING CHART ............7 WIRING DIAGRAM ..........18 DISASSEMBLY ............8 EXPLODED VIEW...........19 BLOCK DIAGRAM.............9 REPLACEMENT PARTS LIST .......21 DISCRIPTION OF BLOCK DIAGRAM ....10 ADJUSTMENT ............12 SCHEMATIC DIAGRAM ......... -
Page 3: Precautions
PRECAUTION WARNING FOR THE SAFETY-RELATED COMPONENT. WARNING • There are some special components used in LCD BE CAREFUL ELECTRIC SHOCK ! 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: Servicing 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 5 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 6 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"...
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Page 7: Timing Chart
TIMING CHART VIDEO SYNC Total Video Sync Front Blanking Sync MODE H / V Frequency Duration Porch Time Resolution Period Active Polarity Clock ( D ) ( C ) ( B ) ( E ) Time ( A ) H(Pixels) 25.175 31.469 640 x 350... -
Page 8: Disassembly
DISASSEMBLY Remove the screws. Disassembly Hinge Cover. Pull out the cable. Remove the screws. 1. Pull the front cover upward. 1.Disassemble Control PCB. 2. Then, let the all latches are separated. 2. Put the front face down. Disassemble back cover - 8 -... -
Page 9: Block Diagram
BLOCK DIAGRAM - 9 -... -
Page 10: 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 11: Lips Board Block Diagram
LIPS Board Block Diagram 50 ~ 60Hz 100KHz SWITCHING HVDC INPUT RECTIFIER OUTPUT RECTIFIER TRANSFORMER COMPONENTS AND FILTER AND FILTER LINE 100 ~ 240V SIGNAL PHOTO- COLLENT- CONTROL COUPLER CIRCUIT ISOLATION PRIMARY SECONDARY High Voltage INVERTER CIRCUIT 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 12: 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 13: Service Osd
SERVICE OSD 1) Turn off the power switch at the front side of the display. 2) Wait for about 5 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) Auto Color : W/B balance and Automatically sets the gain and offset value. -
Page 14: Troubleshooting Guide
TROUBLESHOOTING GUIDE 1. NO POWER NO POWER (POWER INDICATOR OFF) CHECK ADAPTER AND CHECK J406 TEST WITH ANOTHER VOLTAGE PIN 1 (12V)? CHECK CHECK U503 AND U503 PIN 5 AROUND CIRCUIT VOLTAGE (5V) ? IS U501 CHECK U501 PIN3 (3.3V) VOLTAGE ? IS U502 PIN2 (1.8V) - Page 15 2. NO RASTER (OSD IS NOT DISPLAYED) – INVERTER NO RASTER (OSD IS NOT DISPLAYED) CHECK 12V LINE, AND J403 FIND OUT A OPEN PIN1, PIN2 POINT AS OPENING 12V? EACH POWER LINE CHECK MICOM INV J403 PIN7 ON/OFF PORT. 3.3V? J403 PIN6 CHECK SCALER DIM-...
- Page 16 3. NO RASTER (OSD IS NOT DISPLAYED) – MSTAR NO RASTER (OSD IS NOT DISPLAYED) U101 CHECK U501 PIN 71, 87 3.3V? U101 1. CHECK C110, C109 PIN127, 128 SOLDERING CONDITION OSCILLATE AS 2. CHECK X101 14.31MHZ? 3. TROUBLE IN U101 U101 PIN32 IS 48KHz H-SYNC? CHECK CONNECTION LINE...
- Page 17 4. TROUBLE IN DPM TROUBLE IN DPM CHECK PC CHECK PC IS NOT GOING R458, R459 INTO DPM OFF MODE CHECK U101 PIN 32,33 CHECK H/V SYNC LINE SYNC PULSE ? TROUBLE IN U101 Waveforms 3 R459 V-Sync R458 H-Sync - 17 -...
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Page 18: Wiring Diagram
WIRING DIAGRAM 6631900080A 6631T12006F 6631T12006L - 18 -... -
Page 19: Exploded View
EXPLODED VIEW - 19 -... -
Page 20: Schematic Diagram
SCHEMATIC DIAGRAM 1. SCALER - 23 -... -
Page 21: Replacement Parts List
2. POWER & WAFER - 24 -... - Page 22 3. DC-DC BLOCK - 25 -...
- Page 23 Jun. 2006 P/NO : 38289S0041 Printed in Korea...