Table of Contents
Advertisement
Quick Links
Service Guide Specification
Service Guide Specification
1.
Model Description
L1750U-SNN
MODEL
L1750U-BNN
L1750U-GNN
ANRUQP
SUFFIX
2.
Printing Specification
1. Trim Size (Format) :
2. Printing Colors
• Cover :
LG COLORS
• Inside :
Black
3. Stock (Paper)
• Cover :
Snow White 150 g/㎡
• Inside :
Snow White 100 g/㎡
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 L1750U-SN
FLATRON L1750U-BN
FLATRON L1750U-GN
CHANGE
담 당
관 리 자
Part No.
38289S0012A
CONTENTS
Advertisement
Table of Contents
Related Manuals for LG L1750U-SNN.AN QP Series
Summary of Contents for LG L1750U-SNN.AN QP Series
- Page 1 FLATRON L1750U-BN FLATRON L1750U-GN Printing Specification 1. Trim Size (Format) : 215mm x 280 mm 2. Printing Colors • Cover : LG COLORS • Inside : Black 3. Stock (Paper) • Cover : Snow White 150 g/㎡ • Inside : Snow White 100 g/㎡...
- Page 2 P/NO.38289S0012A Pagination sheet 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-94 MODEL: L1750U-SN (L1750U-SNN.AN**QP) L1750U-BN (L1750U-BNN.AN**QP) L1750U-GN (L1750U-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...
-
Page 5: 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 DESCRIPTION OF BLOCK DIAGRAM....10 ADJUSTMENT ............ -
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"...
-
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 Remove the screws. Disassembly Tilt swivl. Remove line. Disassemble cover. Pell off the line. 1. Pull the front cover upward. 2. Then, let the all latches are separated. 3. Put the front face down. Remove Al-tape from control pcb fix. Remove the 4 screws from each side of metal frame. -
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 Adapter 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 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
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 17: Troubleshooting Guide
TROUBLESHOOTING GUIDE 1. NO POWER NO POWER (POWER INDICATOR OFF) OPEN ADAPTER, CHECK THE AND FIND OUT A SHORT VOLTAGE OF POINT AS OPENING ADAPTER(12V) EACH POWER LINE CHECK CHECK U804 PIN 12V LINE U804 PIN 1 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 12V LINE&ADPTER J705 AND FIND OUT A SHORT PIN6, PIN7 POINT AS OPENING 12V? EACH POWER LINE CHECK MICOM INV J705 PIN1 ON/OFF PORT. 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? U201 1. CHECK PIN96 PIN96, 97 SOLDERING CONDITION OSCILLATE AS 2. CHECK X501 12MHZ? 3.
- Page 20 4. TROUBLE IN DPM TROUBLE IN DPM CHECK CHECK PC PC IS NOT GOING R778, R781 INTO DPM OFF MODE CHECK U501 PIN 43.44 CHECK H/V SYNC LINE SYNC PULSE ? TROUBLE IN U501 Waveforms 3 R781 V-Sync R778 H-Sync - 17 -...
-
Page 21: Wiring Diagram
WIRING DIAGRAM Connector Ass’y P/N: 6631T11024A Connector Ass’y P/N: Connector Ass’y P/N: Connector Ass’y P/N: 6631T11025A 6631T05002A 68509F0001A - 18 -... -
Page 22: Exploded View
EXPLODED VIEW - 19 -... - Page 23 CABINET ASSEMBLY, L1750U BRAND L122 BLACK ABS350 9930 TCO99 8MS 30919L0003C CABINET ASSEMBLY, L1750U BRAND L122 WHITE ABS TCO03 8MS JP-VER 6304FLP280A LCD(LIQ U ID CRYSTAL DISPLAY), LM170E01-TLA4 LG PHILPS TFT COLOR 8MS,LPL NJ/KUMI,PB FREE,EGI,SS S D-IC,EGI,250NITS,SXGA,LVDS 3809900100A BACK COVER ASSEMBLY, L1750U L100 ABS350 9930(BK)-SILVER,BLACK 3809900100B...
-
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 MODEL :L1750U DATE:2005.07.01 MODEL :L1750U DATE:2005.07.01 LOC NO PART NO. DESCRIPTION/SPECIFICATON PART NO. DESCRIPTION/SPECIFICATON LOC NO C A P A C I T O R s D I O D E s C 2 0 4... - Page 25 MODEL :L1750U DATE:2005.07.01 MODEL :L1750U DATE:2005.07.01 PART NO. DESCRIPTION/SPECIFICATON PART NO. DESCRIPTION/SPECIFICATON LOC NO LOC NO R 5 2 0 0 R J 4 7 0 1 D 6 7 7 4.7K OHM 1/10 W 5% 1608 R/TP SOD323 0.2W 5.6V 5MA .PF" R 5 2 1 0 R J 4 7 0 1 D 6 7 7 4.7K OHM 1/10 W 5% 1608 R/TP...
-
Page 26: Schematic Diagram
SCHEMATIC DIAGRAM 1. TSU56AL HSYNC 3.3V-PL X-IN MST-RESET DIMADJ(1) 3.3VD 3.3VD 1.8VD PAD-IN 1.8VD 3.3VD 3.3VD 1.8VD - 23 -... - Page 27 2. MICOM - 24 -...
- Page 28 3.POWER - 25 -...
- Page 29 4. CONNECTOR & JACKS 5.6V 5.6V ZD711 ZD711 GNDR GNDG GNDB ZD704 ZD704 5.6V 5.6V C717 C717 100pF 100pF ZD702 ZD702 5.6V 5.6V R717 R717 4.7K 4.7K ZD703 ZD703 5.6V 5.6V ZD701 ZD701 5.6V 5.6V C718 C718 100pF 100pF R716 R716 4.7K 4.7K...
- Page 30 5.KEY - 27 -...
- Page 31 Mar. 2005 P/NO : 38289S0012A Printed in China...
Need help?
Do you have a question about the L1750U-SNN.AN QP Series and is the answer not in the manual?
Questions and answers