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Service Guide Specification
Service Guide Specification
1.
Model Description
L1721BN
MODEL
L1921BN
SUFFIX
KNEUEPW
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
32 (Including blank 2pages)
* LGEWA : Printed in U.K.
* LGEMX : Printed in Mexico
* LGEIL : Printed in India
CHANGE NO.
LG
FLATRON L1721B
FLATRON L1921B
CHANGE
담 당
관 리 자
LEE H.J
KIM J.O
05.05.04
05.05.04
Part No.
38289S0001D
CONTENTS
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Related Manuals for LG FLATRON L1721B
Summary of Contents for LG FLATRON L1721B
- Page 1 KIM J.O Model Description 05.05.04 05.05.04 L1721BN MODEL BRAND L1921BN Part No. 38289S0001D FLATRON L1721B SUFFIX KNEUEPW Product Name FLATRON L1921B Printing Specification 1. Trim Size (Format) : 215mm x 280 mm 2. Printing Colors • Cover : 2 COLORS (M100%, BLACK) •...
- Page 2 P/NO.38289S0001D Pagination sheet Pagination sheet Total pages :32pages Front cover English English English English English Cover Inside …. ….. English English English English English Rear cover Rear Inside Cover …. blank blank...
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Page 3: Color Monitor
Website:http://biz.LGservice.com E-mail:http://www.LGEservice.com/techsup.html COLOR MONITOR SERVICE MANUAL CHASSIS NO. : CL-82 MODEL: L1721B (L1721BN.AN**EP) L1921B (L1921BN.AL**EP) ) **Same model for Service CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. *To apply the MSTAR Chip. -
Page 4: Table Of Contents
CONTENTS SPECIFICATIONS ........... 2 SERVICE OSD ............14 PRECAUTIONS ............3 TROUBLESHOOTING GUIDE ......15 TIMING CHART ............7 WIRING DIAGRAM ..........19 BLOCK DIAGRAM ........... 8 EXPLODED VIEW...........20 DESCRIPTION OF BLOCK DIAGRAM.....9 REPLACEMENT PARTS LIST .......24 ADJUSTMENT ............13 SCHEMATIC DIAGRAM ......... -
Page 5: 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 6: 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 7 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 8 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 9: Timing Chart
TIMING CHART VIDEO SYNC << Dot Clock (MHz), Horizontal Frequency (kHz), Vertical Frequency (Hz), Horizontal etc... (µs), Vertical etc... (ms) >> Total Video Sync Front Blanking Sync MODE H / V Frequency Period Active Duration Porch Time Resolution Polarity Clock ( E ) Time ( A ) ( D ) -
Page 10: Block Diagram
BLOCK DIAGRAM (L1721B) - 8 -... -
Page 11: Description Of Block Diagram
DESCRIPTION OF BLOCK DIAGRAM (L1721B) 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 12 BLOCK DIAGRAM (L1921B) - 10 -...
- Page 13 DESCRIPTION OF BLOCK DIAGRAM (L1921B) 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.
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Page 14: 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 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) 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 2.5V? 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? 1. CHECK PIN122, 123 U201 SOLDERING CONDITION PIN96, 97 2. CHECK X501 OSCILLATE AS 3.
- Page 20 4. TROUBLE IN DPM TROUBLE IN DPM CHECK CHECK PC R216, R217 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 R217, R781 V-Sync R216, R778 H-Sync - 18 -...
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Page 21: Wiring Diagram
WIRING DIAGRAM Connector Ass’y P/N: 6631T11012W or 6631T11020W Connector Ass’y P/N: 6631T20023A Connector Ass’y P/N: 6631T20024C Connector Ass’y P/N: 6631T20008G - 19 -... -
Page 22: Exploded View
EXPLODED VIEW (L1721B) - 20 -... - Page 23 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 6304FLP180B LCD(LIQUID CRYSTAL DISPLAY), LM170E01-A6K1 LG PHILPS TFT COLOR LPL NJ,PB FREE,EGI,TI S D-IC,SXGA,LVDS COST COMPENSATION or 6304FLP179B LCD(LIQUID CRYSTAL DISPLAY), LM170E01-A6 LG PHILPS TFT COLOR LPL NJ,PB FREE,NEC S D-IC,EGI,250NITS,SXGA,LVDS COST COMPENSATION...
- Page 24 EXPLODED VIEW (L1921B) - 22 -...
- Page 25 Ref. No. 3091TKL095Q CABINET ASSEMBLY, L1921 BRAND L083 N-CKD ABS 9930 BLACK 6304FLP134A LCD(LIQUID CRYSTAL DISPLAY), LM190E02-A4 LG PHILPS TFT COLOR SLIM,20T,SXGA,LVDS 3809TKL066N BACK COVER ASSEMBLY, L1921 L066 L-CKD ABS HF380 05941 WHITE 3043TKK118H TILT SWIVEL ASSEMBLY, L1921 K691 F-CKD ABS HF380 05941 WHITE...
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Page 26: 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. 05. 04. DATE: 2005. 05. 04. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. - Page 27 DATE: 2005. 05. 04. DATE: 2005. 05. 04. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION CONTROL BOARD R508 0RJ4701D677 4.7K OHM 1/10 W 5% 1608 R/TP R520 0RJ4701D677 4.7K OHM 1/10 W 5% 1608 R/TP 0CK104CK56A 0.1UF 1608 50V 10% R/TP X7R-LPL R521...
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Page 28: Schematic Diagram
SCHEMATIC DIAGRAM 1. TSU56AL / TSU16AL - 26 -... - Page 29 2. MICOM - 27 -...
- Page 30 3.POWER - 28 -...
- Page 31 4. CONNECTOR & JACKS - 29 -...
- Page 32 Blank Page1...
- Page 33 Blank Page2...
- Page 34 May. 2005 P/NO : 38289S0001D Printed in Korea...