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Service Guide Specification
Service Guide Specification
1.
Model Description
L1750G-S(G)NN
MODEL
L1950G-S(G)NN
SUFFIX
KNEUQPD
2.
Printing Specification
1. Trim Size (Format) :
2. Printing Colors
• Cover :
2 COLORS (M100%, BLACK)
• Inside :
1 COLORS (Black)
3. Stock (Paper)
백상지 100 g/㎡
• Cover :
백상지 100 g/㎡
• Inside :
4. Printing Method :
5. Bindery :
6. Language :
7. Number of pages :
3.
Special Instructions
(1) Origin Notification
* LGEDI : Printed in Indonesia
* LGESP : Printed in Brazil
* LGENT : Printed in China
4.
Changes
8
7
6
5
4
3
2
1
REV.
SIGNATURE
MM/DD/YY
NO.
BRAND
Product Name
215mm x 280 mm
Saddle stitch
English
28 (Including blank 1page)
* LGEWA : Printed in U.K.
* LGEMX : Printed in Mexico
* LGEIL : Printed in India
CHANGE NO.
LG
FLATRON L1750G
FLATRON L1950G
CHANGE
담 당
관 리 자
LEE H.J
KIM J.O
05.12.21
05.12.21
Part No.
3828TSL093Z
CONTENTS
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Summary of Contents for LG FLATRON L1750G
- Page 1 KIM J.O Model Description 05.12.21 05.12.21 L1750G-S(G)NN MODEL BRAND L1950G-S(G)NN Part No. 3828TSL093Z FLATRON L1750G SUFFIX KNEUQPD Product Name FLATRON L1950G Printing Specification 1. Trim Size (Format) : 215mm x 280 mm 2. Printing Colors • Cover : 2 COLORS (M100%, BLACK) •...
- Page 2 P/NO. Pagination sheet 3828TSL093Z Pagination sheet Total pages :28pages Front cover English English English English English Cover Inside blank …. ….. English English English English English Rear cover Rear Inside Cover ….
- Page 3 Website:http://biz.LGservice.com E-mail:http://www.LGEservice.com/techsup.html COLOR MONITOR SERVICE MANUAL CHASSIS NO. : CL-82 MODEL: L1750G (L1750G-SNN.AN**QP) L1750G (L1750G-GNN.AN**QP) L1950G (L1950G-SNN.AN**QP) L1950G (L1950G-GNN.AN**QP) ) **Same model for Service CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. *To apply the MSTAR Chip.
- Page 4 Blank Page1...
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Page 5: Table Of Contents
CONTENTS SPECIFICATIONS ........... 2 ADJUSTMENT ............12 PRECAUTIONS ............3 TROUBLESHOOTING GUIDE ......14 TIMING CHART ............7 WIRING DIAGRAM ..........18 DISASSEMBLY ............8 EXPLODED VIEW...........19 BLOCK DIAGRAM ........... 9 REPLACEMENT PARTS LIST .......21 DESCRIPTION OF BLOCK DIAGRAM....10 SCHEMATIC DIAGRAM ......... 23 SPECIFICATIONS 1. -
Page 6: 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 7 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 8 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 9 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 10: Timing Chart
TIMING CHART VIDEO SYNC << Dot Clock (MHz), Horizontal Frequency (kHz), Vertical Frequency (Hz), Horizontal etc... (µs), Vertical etc... (ms) >> Total Front Back Display Sync. MODE Section Polarity Frequency Resolution Period Porch Porch Clock ( A ) ( C ) ( E ) ( D ) ( B ) -
Page 11: Disassembly
DISASSEMBLY Disassembly Hinge Cover. Remove the screws. Disassemble back cover. 1. Pull the front cover upward. 2. Then, let the all latches are separated. 3. Put the front face down. Remove the 6 screws from each up of metal frame. Pell off Al-tape from panel. -
Page 12: Block Diagram
BLOCK DIAGRAM - 9 -... -
Page 13: 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 14 LIPS Board Block Diagram 50 ~ 60Hz 100KHz HVDC ENERGY INPUT RECTIFIER OUTPUT RECTIFIER TRANSFER COMPONENTS AND FILTER AND FILTER LINE 100 ~ 240V SIGNAL PHOTO- COLLENT- COMTROL COUPLER CIRCUIT ISOLATI ON 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.
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Page 15: 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 16 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.
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Page 17: 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 18 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 19 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 SOLDERING CONDITION PIN96, 97 OSCILLATE AS 2. CHECK X501 3.
- Page 20 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 -...
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Page 21: Wiring Diagram
WIRING DIAGRAM 6631T11012W 6631T20034M 6631T11017X-L1750G or 6631T20023A 6631T11017Y-L1950G - 18 -... -
Page 22: Exploded View
EXPLODED VIEW - 19 -... - Page 23 LCD(LIQUID CRYSTAL DISPLAY), LM170E01-A6KC LG PHILPS TFT COLOR DOT FREE,8MS,PB FREE,EGI,TI S D-IC,LPL NJ,SXGA,LVDS or 6304FLP298A LCD(LIQUID CRYSTAL DISPLAY), LM170E01-TLAA LG PHILPS TFT COLOR DOT FREE OF LM170E01-TLA1 LG PHILPS TFT COLOR P5,645CH,250NITS,8MS or 6304FLP299A LCD(LIQUID CRYSTAL DISPLAY), LM170E01-TLAB LG PHILPS TFT COLOR DOT FREE OF LM170E01-TLA2 LG PHILPS TFT COLOR P6,645CH,250NITS,8MS...
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Page 24: 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. 11. 30. DATE: 2005. 11. 30. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. - Page 25 DATE: 2005. 11. 30. DATE: 2005. 11. 30. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R534 0RJ0000D677 0 OHM 1/10 W 5% 1608 R/TP 0RJ4701D677 4.7K OHM 1/10 W 5% 1608 R/TP R535 0RJ3301D677 3.3K OHM 1/10 W 5% 1608 R/TP...
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Page 26: Schematic Diagram
SCHEMATIC DIAGRAM 1. TSU56AL / TSU16AL - 23 -... - Page 27 2. MICOM - 24 -...
- Page 28 3.POWER - 25 -...
- Page 29 4. CONNECTOR & JACKS - 26 -...
- Page 30 Nov. 2005 P/NO : 3828TSL093Z Printed in Korea...
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