LG L1717SBN - - 17" LCD Monitor Service Manual

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Summary of Contents for LG L1717SBN - - 17" LCD Monitor

Page 1 Website:http://biz.LGservice.com E-mail:http://www.LGEservice.com/techsup.html COLOR MONITOR SERVICE MANUAL CHASSIS NO. : CL-82 MODEL: L1717S (L1717S-SNN.AN**EP) L1717S (L1717S-BNN.AN**EP) L1717S (L1717S-GNN.AN**EP) ) **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 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 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 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"...
Page 7: Timing Chart
TIMING CHART VIDEO SYNC Total Video Sync Front Blanking Sync MODE H / V Frequency Period Active Duration Porch Time Resolution Polarity Clock ( E ) Time ( A ) ( D ) ( C ) ( B ) H(Pixels) 25.175 31.469 640 x 350...
Page 8: Disassembly
DISASSEMBLY 1. Pull the front cover upward. Remove the screws. 2. Then, let the all latches are separated. 3. Put the front face down. Disassemble back cover. Disassemble Control PCB. Pull out the cable. Remove the screws. Pull out the link cable while pushing up the main frame.
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 HVDC INPUT RECTIFIER ENERGY OUTPUT RECTIFIER COMPONENTS AND FILTER TRANSFER AND FILTER LINE 100 ~ 240V SIGNAL PHOTO- COLLENT- COUPLER COMTROL ISOLATI ON CIRCUIT 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 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 POWER BOARD, CHECK J705 AND FIND OUT A SHORT VOLTAGE POINT AS OPENING PIN5, PIN6 (5V)? EACH POWER LINE CHECK CHECK 5VS LINE U501 PIN 8 VOLTAGE (OPEN CHECK) (5V) ? NO PROBLEM CHECK KEY CONTROL...
Page 15 2. NO RASTER (OSD IS NOT DISPLAYED) – LIPS NO RASTER (OSD IS NOT DISPLAYED) CHECK POWER BOARD, J705 AND FIND OUT A SHORT PIN5, PIN6 POINT AS OPENING EACH POWER LINE CHECK MICOM INV J705 PIN9 ON/OFF PORT. 2.5V? 1.
Page 16 3. NO RASTER (OSD IS NOT DISPLAYED) – MSTAR NO RASTER (OSD IS NOT DISPLAYED) U201 CHECK U801 (17", 19") PIN 18, 90 CHECK U803 (15") 3.3V? 1. CHECK PIN122, 123 U201 PIN96, 97 SOLDERING CONDITION OSCILLATE AS 2. CHECK X501 3.
Page 17 4. TROUBLE IN DPM TROUBLE IN DPM CHECK PC CHECK PC IS NOT GOING R216, R217 INTO DPM OFF MODE R778, R781 CHECK U501 PIN 43.44 CHECK H/V SYNC LINE SYNC PULSE ? TROUBLE IN U501 Waveforms 3 R217, R781 V-Sync R216, R778 H-Sync - 17 -...
Page 18: Wiring Diagram
WIRING DIAGRAM Connector Ass’y P/N: Connector Ass’y P/N: 6631T11012W 6631T20020Q or 6631T11020W POWER MAIN CONTROL Connector Ass’y P/N: 6631T20022G - 18 -...
Page 19 - 19 -...
Page 20: Exploded View Parts List
3091TKL178F CABINET ASSEMBLY, L1717S BRAND L155 GRAY TCO99 E-CKD-WA LOCAL-For Europe.U.K 6304FLP275A LCD(LIQUID CRYSTAL DISPLAY), LM170E01-TLA3 LG PHILPS TFT COLOR P5,645CH,250NITS,8MS,LPL NJ/KUMI,PB FREE,EGI,MAGNA S D-IC,EGI,SXGA or 6304FLP199A LCD(LIQUID CRYSTAL DISPLAY), LM170E01-A6K3 LG PHILPS TFT COLOR 8MS,LPL NJ/KUMI,PB FREE,EGI,SS S D-IC,EGI,250NITS,SXGA,LVDS...
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: 2005. 06. 02. DATE: 2005. 06. 02. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC.
Page 22 DATE: 2005. 06. 02. DATE: 2005. 06. 02. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R522 0RJ4701D677 4.7K OHM 1/10 W 5% 1608 R/TP 0RD2001Q609 2K OHM 1/4 W(3.4) 5.00% TA52 R523 0RJ4701D677 4.7K OHM 1/10 W 5% 1608 R/TP...
Page 23: Schematic Diagram
SCHEMATIC DIAGRAM 1. TSU56AL / TSU16AL - 23 -...
Page 24 2. MICOM - 24 -...
Page 25 3.POWER - 25 -...
Page 26 4. CONNECTOR & JACKS - 26 -...
Page 27 Jun. 2005 P/NO : 38289S0001Z Printed in Korea...

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