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Table of Contents
Related Manuals for LG FlatronL204WT
Summary of Contents for LG FlatronL204WT
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Page 1: Color Monitor
Website:http://biz.LGservice.com E-mail:http://www.LGEservice.com/techsup.html COLOR MONITOR SERVICE MANUAL CHASSIS NO. : LM62B MODEL: L204WT(L204WT-SFQ.A**BQF) L204WT(L204WT-BFQ.A**BQF) ) **Same model for Service CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. -
Page 2: Table Of Contents
CONTENTS SPECIFICATIONS ........... 2 ADJUSTMENT ............13 PRECAUTIONS ............4 TROUBLESHOOTING GUIDE ......15 TIMING CHART ............8 WIRING DIAGRAM ..........19 DISASSEMBLY ............9 EXPLODED VIEW...........20 BLOCK DIAGRAM ..........10 REPLACEMENT PARTS LIST .......22 DESCRIPTION OF BLOCK DIAGRAM....11 SCHEMATIC DIAGRAM ......... 24 SPECIFICATIONS 1. -
Page 3: Signal Connector Pin Assignment
Signal Connector Pin Assignment • DVI-D Connector (Digital) Signal (DVI-D) Signal (DVI-D) T. M. D. S. Data2- Hot Plug Detect T. M. D. S. Data0- T. M. D. S. Data2+ T. M. D. S. Data2/4 Shield T. M. D. S. Data0+ 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: 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 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"...
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Page 8: Timing Chart
TIMING CHART VIDEO SYNC Total Video Sync Front Blanking Sync MODE H / V Frequency Period Active Duration Porch Time Resolution Polarity Clock ( D ) ( C ) ( B ) ( E ) Time ( A ) H(Pixels) 28.321 31.468 720 X 400... -
Page 9: Disassembly
DISASSEMBLY 1. Pull the front cover upward. Remove the screws. 2. Then, let the all latches are separated. 1. Open the Cabinet latch with Jig. Disassemble back cover. Disassemble Cabinet. 3. Put the front face down. Disassemble Connector. - 9 -... -
Page 10: Block Diagram
BLOCK DIAGRAM Module DVI-D D-Sub - 10 -... -
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 136MHz in L194WT/WTM/WTQ case(146MHz In L204WT/WTM/WTQ CASE). -
Page 12: Lips Board Block Diagram
LIPS Board Block Diagram 50 ~ 60Hz 100KHz HVDC ENERGY OUTPUT RECTIFIER INPUT RECTIFIER COMPONENTS TRANSFER AND FILTER AND FILTER LINE 100 ~ 240V SIGNAL PHOTO- Collection COUPLER CONTROL ISOLATION CIRCUIT Feedback PRIMARY SECONDARY Operation description_Power 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 => Doesn’t need setup Windows 2000, XP => Need to Port Setup. This program is available for LCD Monitor only. 1. -
Page 14: Service Osd
SERVICE OSD 1) Turn off the power switch at the right side of the display. 2) Wait for about 5 seconds and press MENU, POWER switch for 1 second interval. 3) The SVC OSD menu contains additional menus that the User OSD menu as described below. a) CLEAR ETI : To initialize using time. -
Page 15: Troubleshooting Guide
TROUBLESHOOTING GUIDE 1. NO POWER NO POWER (POWER INDICATOR OFF) CHECK POWER BOARD, CHECK P702 AND FIND OUT A SHORT VOLTAGE POINT AS OPENING PIN5, PIN6 (5V)? EACH POWER LINE CHECK IC601(1.8V) IS IC601 PIN2(1.8V) IC602(3.3V) LINE IC602 PIN2(3.3V) CHECK IC501 PIN108 CHECK CRYSTAL(X501) PULSE CHECK IC501... - Page 16 2. NO RASTER (OSD IS NOT DISPLAYED) – LIPS NO RASTER (OSD IS NOT DISPLAYED) CHECK P702 CHECK POWER BOARD VOLTAGE PIN5,6 (LIPS) (5V)? CHECK IC501 INVERTER P702 PIN9 5V? ON/OFF PORT 1. CONFIRM BRIGHTNESS OSD CONTRL STATUS 2. CHECK MICOM DIM-ADJ CHECK P702 PORT PIN10 PIN11...
- Page 17 3. NO RASTER (OSD IS NOT DISPLAYED) - MAIN NO RASTER (OSD IS NOT DISPLAYED) CHECK IC501 CHECK IC601(1.8V), PIN2(3.3V) IC602(3.3V) PIN17(1.8V) 1. CHECK PIN 108,109 U501 SOLDERING CONDITION PIN 108,109 2. CHECK X501 14.3MHZ? 3. TROUBLE IN IC501 CHECK IC501 CHECK CONNECTION PIN89(H-SYNC) AND LINE FROM D-SUB TO...
- Page 18 4. TROUBLE IN DPM TROUBLE IN DPM CHECK PC CHECK R720 AND PC IS GOING R726, SYNC INTO DPM MODE APPEARED? CHECK IC501 PIN89,90 CHECK H/V SYNC LINE SYNC PULSE TROUBLE IN IC501 Waveforms 1 H-SYNC 2 V-SYNC - 18 -...
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Page 19: Wiring Diagram
WIRING DIAGRAM 6631900109A 6631900034P 6631900030D - 19 -... -
Page 20: Exploded View
EXPLODED VIEW - 20 -... -
Page 21: Exploded View Parts List
EXPLODED VIEW PARTS LIST * Note: Safety mark Ref. No. Part No. Description 30919L0033B Cover Assembly, L204WT/WTM LM62B 20" SILVER-For Canada, U.S.A 30919L0033J Cover Assembly, L204WT/WTM LM62B 20" SILVER AUSTRALIA 30919L0033A Cover Assembly, L204WT/WTM LM62B 20" BLACK EAJ30235801 LCD,Module-TFT, CLAA201WA03Q DRIVER 20.1INCH 1680X1050 300CD COLOR 72% 16/10 600:1 WSXGA+,6MS,160/160,6LAMP 3809900217A Cover Assembly, L204WT/WTQ ... -
Page 22: 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: 2006. 06. 02. DATE: 2006. 06. 02. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. - Page 23 DATE: 2006. 06. 02. DATE: 2006. 06. 02. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION TRANSISTOR R722 0RJ4701D677 MCR03EZPJ472 4.7KOHM 5% 1/10 Q502 0TRDI80002A MMBT3904-(F) NPN 6V 60V 40V R723 0RJ4701D677 MCR03EZPJ472 4.7KOHM 5% 1/10...
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Page 24: Schematic Diagram
SCHEMATIC DIAGRAM 1. SCALER - 24 -... - Page 25 2. POWER - 25 -...
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Page 26: Wafer
3. WAFER - 26 -... - Page 27 Aug. 2006 P/NO : MFL34519502 Printed in China...