LG flatron M1740A Service Manual
  1. Manuals
  2. Brands
  3. LG Manuals
  4. Monitor
  5. flatron M1740A
  6. Service manual
LG flatron M1740A Service Manual

LG flatron M1740A Service Manual

Hide thumbs Also See for flatron M1740A:
Table of Contents

Advertisement

Quick Links

See also: User Manual
Service Guide Specification
Service Guide Specification
1.
Model Description
M1740A-RZB
MODEL
M1940A-RZB
M2040A-RZB
SUFFIX
SNWULFW
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
36
* LGEWA : Printed in U.K.
* LGEMX : Printed in Mexico
* LGEIL : Printed in India
CHANGE NO.
LG
FLATRON M1740A
FLATRON M1940A
FLATRON M2040A
CHANGE
담 당
관 리 자
LEE H.J
KIM J.O
05.12.30
05.12.30
Part No.
3828TSL094P
CONTENTS

Advertisement

Table of Contents
loading

Related Manuals for LG flatron M1740A

Summary of Contents for LG flatron M1740A

  • Page 1 KIM J.O Model Description 05.12.30 05.12.30 M1740A-RZB MODEL M1940A-RZB BRAND M2040A-RZB Part No. 3828TSL094P FLATRON M1740A SUFFIX SNWULFW Product Name FLATRON M1940A FLATRON M2040A Printing Specification 1. Trim Size (Format) : 215mm x 280 mm 2. Printing Colors • Cover : 2 COLORS (M100%, BLACK) •...
  • Page 2 P/NO. Pagination sheet 3828TSL094P Pagination sheet Total pages :36pages Front cover English English English English English Cover Inside …. ….. 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-75 MODEL: M1740A (M1740A-RZB.AN**LF) M1940A (M1940A-RZB.AN**LF) M2040A (M2040A-RZB.AL**LF) ) **Same model for Service CAUTION BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. SOURCE MENU < VOL > AUTO/SELECT...

  • Page 4: Table Of Contents

    CONTENTS SPECIFICATIONS ........... 2 ADJUSTMENT ............12 PRECAUTIONS ............4 TROUBLESHOOTING GUIDE ......15 SERVICE PRECAUTIONS ........5 WIRING DIAGRAM ..........19 TIMING CHART ............7 EXPLODED VIEW...........20 DISASSEMBLY ............8 REPLACEMENT PARTS LIST .......22 BLOCK DIAGRAM ........... 9 DESCRIPTION OF BLOCK DIAGRAM ....10 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: Service Precautions

    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"...

  • Page 9: Timing Chart

    TIMING CHART VIDEO SYNC Total Front Back Display Sync. Mode Section Polarity Frequency Period Porch Porch Resolution Clock ( A ) ( C ) ( E ) ( D ) ( B ) H(Pixels) 25.175 31.469 640 x 350 V(Lines) 70.09 H(Pixels) 28.321...

  • Page 10: Disassembly

    DISASSEMBLY Remove the screws. Disassembly Hinge Cover. Remove the screws. Open the Backcover's latch with Jig. Remove the 4 screws of metal frame. Disassemble back cover. - 8 -...

  • Page 11: Block Diagram

    BLOCK DIAGRAM - 9 -...

  • Page 12: Description Of Block Diagram

    DESCRIPTION OF BLOCK DIAGRAM 1. Format Converter (MST9883C)(U702) This IC contain A/D converter, Pre-amp and PLL circuit that converting. Analog video signal(0.7p-p RGB) to digital signal.(656 Format) 2. Power Supply Block (LIPS) This Block Generates DC Voltage (5V,15V) to Main Control system from AC Power (100-240V, 50/60Hz, 1.0A) The Minimum of Power efficiency is about 80%.

  • Page 13: Lips Board Block Diagram

    LIPS Board Block Diagram 50 ~ 60Hz 100KHz ENERGY HVDC INPUT RECTIFIER OUTPUT RECTIFIER TRANSFER COMPONENTS AND FILTER AND FILTER LINE 100 ~ 240V SIGNAL PHOTO- COLLECTI CONTROL COUPLER CIRCUIT ISOLATION 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 14: 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 15: Service Osd

    SERVICE OSD ■ Description of operation - Elapsed time : Time used for back light - Nvram Initial : NVRAM reset (Factory Reset) - Teletext Language : Sets the Teletext Coad - WB Adjust : Adjusts the white balance - Card Reader ISP : The use the Card Reader ISP (N/A in M1740A,M1940A,M2040A) - Teletext TOP : The use the TOP (On / Off) - RGB Test : Adjusts RGB Gain, Offset, Sub-Contrast/Sub-Brightness...
  • Page 16 Audio Audio S-Video ANT IN Audio Video Signal Compatible PC Generator PARALLEL PORT Power inlet (required) 4.7K Power Select Switch 4.7K (110V/220V) 74LS06 Power LED 4.7K 74LS06 ST Switch V-Sync On/Off Switch (Switch must be ON.) Figure 1. Cable Connection - 14 -...

  • Page 17: Troubleshooting Guide

    TROUBLESHOOTING GUIDE 1. NO POWER NO POWER (POWER INDICATOR OFF) CHECK J901 Voltage Check Lips Pin #1,#2 : 15V Pin #5,#6 : 5V Check Micom ID & Version Change Micom Check Crack of Damage Check U903 Pin #3 : 3.3V Of Circuit Item Check U906 Pin #3 : 1.8V Around U903,U906...
  • Page 18 2. NO RASTER(OSD IS NOT DISPLAYED) NO RASTER (OSD IS NOT DISPLAYED) Check Pannel Link Change Pannel Link Cable Cable Change J401 Check J401 Crack Check Micom ID & Change Micom Version Check U918 Pin #2 : 2.5V Check U402 Waveforms U918-#2(2.5V) - 16 -...
  • Page 19 3. NO RASTER ON AV1, AV2, TV NO RASTER ON VIDEO SIGNAL Check Cable of J106 Change Video Board Ass'y Check Video Board Change Video Board Ass'y Check U908 Pin #1,#3 : 5V, 3.3V Check Peripheral Circuit Check U909 Pin #3 : 1.8V In Case of TV In Case of AV1(Scart) Check Peripheral Circuit...
  • Page 20 4. NO SOUND NO SOUND CHECK THE PERIPHERAL Check a Signal of ICOf U201 C153~156 Check the Cable of Change the Cable Main to Key Check the Cable of Change the Cable Key to Speaker Check Speaker Condition << CHECK INPUT SIGNAL>> PC Mode AV2 Mode AV1 Mode...

  • Page 21: Wiring Diagram

    WIRING DIAGRAM 6631T11012W-M1740A,M1940A 6631T11020N-M2040A 6631T20023J 6631T20028U 6631T12006T 6631T12006U 6400ZTTE01A-M1740A,M1940A 6400ZTTS01A-M2040A - 19 -...
  • Page 22 - 20 -...

  • Page 23: Exploded View Parts List

    LCD(LIQUID CRYSTAL DISPLAY), LM170E01-TL11 LG PHILPS TFT COLOR PB FREE,GLARE,TN,420NITS,8MS,LAMP UNLOCKING,SXGA,LVDS 6304FLP197A LCD(LIQUID CRYSTAL DISPLAY), LM190E03-A4K2 LG PHILPS TFT COLOR GLARE,TN,400NITS,12MS,SOUND VIBRATION,20T,SXGA,LVDS or 6304FLP262A LCD(LIQUID CRYSTAL DISPLAY), LM190E03-A4K6 LG PHILPS TFT COLOR DOT FREE,PB FREE OF A4K2,GLARE,TN,400NITS,12MS,SOUND VIBRATION,20T 6304FLP282A LCD(LIQUID CRYSTAL DISPLAY), LM201U04-SL03 LG PHILPS TFT COLOR P6,GLARE,300NITS,16MS,PB FREE,UXGA,8BITS,LVDS,4MASK 3809TKL105B...

  • 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 C484 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP C656 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP C487 0CH3104K566 0.1UF 50V 10% X7R 2012 R/TP...
  • Page 26 DATE: 2005. 11. 30. DATE: 2005. 11. 30. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION C871 0CK475CC94A "4.7UF 1608 6.3V 80%,-20% F(Y" C973 0CK103CK51A 0.01UF 1608 50V 10% R/TP B(Y C901 0CE477EH618 470UF KMG 25V 20% FL TP 5...
  • Page 27 DATE: 2005. 11. 30. DATE: 2005. 11. 30. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION ZD805 0DZ560009DA UDZ S 5.6B TP ROHM-K SOD323 L814 6210TCE001H HB-1T2012-301JT CERATEC 2012 ZD807 0DZ560009DA UDZ S 5.6B TP ROHM-K SOD323 L815...
  • Page 28 DATE: 2005. 11. 30. DATE: 2005. 11. 30. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION RESISTORs R221 0RH0000D622 0 OHM 1 / 10 W 2012 5.00% D R101 0RJ1000D677 100 OHM 1/10 W 5% 1608 R/TP R222 0RH0000D622...
  • Page 29 DATE: 2005. 11. 30. DATE: 2005. 11. 30. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R448 0RH0000D622 0 OHM 1 / 10 W 2012 5.00% D R622 0RH2700D622 270 OHM 1 / 10 W 2012 5.00% R449 0RH0000D622 0 OHM 1 / 10 W 2012 5.00% D...
  • Page 30 DATE: 2005. 11. 30. DATE: 2005. 11. 30. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION R819 0RH1501D622 1.5K OHM 1 / 10 W 2012 5.00% R925 0RB0470K607 0.47 OHM 2 W 5% TA62 R820 0RJ1000D677 100 OHM 1/10 W 5% 1608 R/TP...
  • Page 31 DATE: 2005. 11. 30. *S *AL LOC. NO. PART NO. DESCRIPTION / SPECIFICATION LED901 0DLBE0168AA BRIGHT LED ELECTRONICS BL-HB LED902 0DLBE0168AA BRIGHT LED ELECTRONICS BL-HB LED903 0DLBE0168AA BRIGHT LED ELECTRONICS BL-HB Q901 0TRIH80001A "RT1C3904-T112,LF ISAHAYA R/T" Q902 0TRIH80001A "RT1C3904-T112,LF ISAHAYA R/T" R901 0RJ1002D677 10K OHM 1/10 W 5% 1608 R/TP...

  • Page 32: Schematic Diagram

    SCHEMATIC DIAGRAM 1. CONNECTOR & JACK - 30 -...
  • Page 33 2. MEMORY/ AUDIO AMP - 31 -...
  • Page 34 3. SCALER(GM1601) - 32 -...
  • Page 35 4. VUDEO DEC(VCT49XYI) - 33 -...
  • Page 36 5. MST9883C/TUNER/SCARTJACK - 34 -...
  • Page 37 6. POWER - 35 -...
  • Page 38 Nov. 2005 P/NO : 3828TSL094P Printed in Korea...

This manual is also suitable for:

Flatron m1940aFlatron m2040a

Table of Contents