Samsung LE20S81BX Service Manual
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Samsung LE20S81BX Service Manual

Tft-lcd tv
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SERVICE
TFT-LCD TV
TFT-LCD TV
Chassis
Model
Manual
Fashion Feature
- Luxurious Slim Design
- Supreme Picture Quality
- Supreme Sound Quality
- Supreme Convenience Quality
- Convenience for Users
GJA20SEU
LE20S81BX

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Summary of Contents for Samsung LE20S81BX

  • Page 1 TFT-LCD TV Chassis GJA20SEU Model LE20S81BX SERVICE Manual TFT-LCD TV Fashion Feature - Luxurious Slim Design - Supreme Picture Quality - Supreme Sound Quality - Supreme Convenience Quality - Convenience for Users...
  • Page 2 Copyright Trademarks ⓒ 2007 by Samsung Electronics Co., Ltd. Samsung is the registered trademark of Samsung Electronics Co., Ltd. All rights reserved. LE26S81BX/LE32S81BX/LE37S81BX/LE40S81BX / This manual may not, in whole or in part, be copied, LE46S81BX and Macmaster Cable Adapter are photocopied, reproduced, translated, or converted to any trademarks of Samsung Electronics Co., Ltd.
  • Page 3 Contents . Precautions ………………………………………………………………………………………………………………………………………1 1-1 Safety Precautions ……………………………………………………………………………………………………………………… 1-1 1-2 Servicing Precautions …………………………………………………………………………………………………………………… 1-2 1-3 Static Electricity Precautions …………………………………………………………………………………………………………… 1-2 1-4 Installation Precautions…………………………………………………………………………………………………………………… 1-3 . Product specifications …………………………………………………………………………………………………………………………2 2-1 Fashion Feature …………………………………………………………………………………………………………………………… 2-1 2-2 LE26S81BX Specifications ……………………………………………………………………………………………………………… 2-2 2-3 LE32S81BX Specifications ……………………………………………………………………………………………………………… 2-3 2-4 LE37S81BX Specifications ………………………………………………………………………………………………………………...

  • Page 4: Table Of Contents

    Contents . Wiring Diagram …………………………………………………………………………………………………………………………………8 8-1 LE26S81BX / LE32S81BX / LE37S81BX / LE40S81BX / LE46S81BX Wiring Diagram …………………………………………8-1 8-2 Main Board Layout ……………………………………………………………………………………………………………………… 8-2 8-3 PIN characteristic ………………………………………………………………………………………………………………………… 8-3 8-4 Power Board Layout ……………………………………………………………………………………………………………………… 8-6 . Schematic Diagrams ……………………………………………………………………………………………………………………………9 10. O O perating Instructions and Installation………………………………………………………………………………………………………1 1 0-1 10-1 Front ……………………………………………………………………………………………………………………………………...
  • Page 5 Asia http://asia.samsungportal.com Mideast & Africa http://mea.samsungportal.com ©2007 Samsung Electronics Co.,Ltd. This Service Manual is a property of Samsung All rights reserved. Electronics Co.,Ltd. Any unauthorized use of Manual can be punished under Printed in Korea applicable International and/or domestic law.
  • Page 6 3 Alignments and Adjustments 3 Alignments and Adjustments 3-1 Service Instruction 1. Usually, a color TV-VCR needs only slight touch-up adjustment upon installation. Check the basic characteristics such as height, horizontal and vertical sync. 2. Use the specified test equipment or its equivalent. 3.
  • Page 7 3 Alignments and Adjustments 3-2 How to Access Service Mode 3-2-1 Entering Factory Mode 1. To enter “Service Mode” Press the remote -control keys in this sequence : - If you do not have Factory remote - control POWER OFF MUTE POWER ON - If you have Factory remote - control...
  • Page 8 3 Alignments and Adjustments 6) Dynamic Luma Adjustment DLC/MWE Part " - " : RF, AV, S_Video -> all store " + " : RF, AV, S_Video -> apart store ▶ NVRAM Reset DLC- 0-10 MWE- Demo Brightness+ 0-255 Contrast+ 0-255 Sharpness+ -10-10...
  • Page 9 3 Alignments and Adjustments 8) UOC Adjustment UOC Adjust BKS- BKS : Black stretch WSx- Wsx : White stretch 0 20 20 20 20 20 0 20 20 20 19 26 ….. 9) Option: Spread Step / Spread Span (for EMI test ) 10) Panel Information various function are included in information.
  • Page 10 3 Alignments and Adjustments 3-4 Service Adjustment 3-4-1 EDID input method -SAMSUNG LCD TV support the DDC control JIG. -You can see the connection between PC and LCD TV. 3-4-2 EDID input method (Windows Program) 1. Execute "WinDDC.EXE" 2. Click "Open[F5]"...
  • Page 11 3 Alignments and Adjustments 3. Select Connected Port#1 and Click Next OK. 4. Select Connected Port#1 and Click Next OK. Find file name : VC20 5. Click Next (OK) button. 6. Select enter button (on Key-Board) After Monitor S/N input.
  • Page 12 3 Alignments and Adjustments 8. Check "DDC OK". 3-4-3 Micom ( TDA15001H) Program Upgrade 1. Program Upgrade Jig 2. Connect the parallel Port...
  • Page 13 3 Alignments and Adjustments 3. Connect Jig to CN905 on PCB Ass'y 4. Click " WISP " Icon on Computer 5. Check "Automatic mode on". 6. Click "Browser" button : Select the Code , Click "Auto Execute" button Check Erase and Write OK In "General" window and check Verify OK in "ISP status"...
  • Page 14 7 Block Diagrams 7 Block Diagram...
  • Page 15 7 Block Diagrams Memo...
  • Page 16 13 Circuit Descriptions 13 Circuit Descriptions 13-1 Overall Block Structure 13-1...
  • Page 17 13 Circuit Descriptions 13-2 Partial Block Description 13-2-1 MAIN BOARD POWER TREE 13-2...

  • Page 18: Wiring Diagram

    13 Circuit Descriptions 13-2-2 WIRING DIAGRAM CN402 CN905 CN906 CN100 CN600 CN907 CN100(9P) : To IP Board CN402(50P) : To 20" Panel CN905(5P) : To Program Download Jig CN906(20P) : To Scart CN600(3P) : Speaker CN907(12P) : To Function Board 13-3...
  • Page 19 13 Circuit Descriptions 13-4...
  • Page 20 11 Disassembly and Reassembly 11 Disassembly and Reassembly This section of the service manual describes the disassembly and reassembly procedures for the TFT-LCD WARNING : This monitor contains electrostatically sensitive devices. Use caution when handling these components. 11-1 Disassembly Cautions : 1. Disconnect the monitor from the power source before disassembly. 2.
  • Page 21 11 Disassembly and Reassembly Description Picture Description 2. Lift up the rear cover and remove the stand. 3. Remove Screws from the stand BRKT and lift up the stand BRKT. 11-2...
  • Page 22 11 Disassembly and Reassembly Description Picture Description 4. Disonnect cable from the boards. 5. Remove screws from the boards and lift up the boards. 11-3...
  • Page 23 11 Disassembly and Reassembly Description Description Picture 6. Remove screws. 7. Lift up the BRKT. 11-4...
  • Page 24 11 Disassembly and Reassembly Description Description Picture 11-2 Reassembly Reassembly procedures are in the reverse order of disassembly procedures. 11-5...
  • Page 25 11 Disassembly and Reassembly Memo 11-6...
  • Page 26 6 Electrical Parts List 6 Electrical Parts List You can search for updated part codes through ITSELF web site. URL : http://itself.sec.samsung.co.kr/ 6-1 LE22S81BX Parts List Level Loc. No. Code No. Description & Specification Q'ty SA/SNA LE22S81BX/XEH LE22S81B,N40B/22S80-GJA,22,LCD-TV,HUNGAR M0001 BN90-01372B ASSY COVER FRONT;LE22S81BX/XEC...
  • Page 27 6 Electrical Parts List Level Loc. No. Code No. Description & Specification Q'ty S.A/S.N.A ...3 JA333 3722-002362 JACK-PIN;2P,Sn,WHT/RED,STRAIGHT ...3 JA333 3722-002362 JACK-PIN;2P,Sn,WHT/RED,STRAIGHT ...3 JA333 3722-002363 JACK-PIN;3P,Sn,YEL/WHT/RED,STRAIGHT ...3 M0107 BN63-01847A SHIELD-COVER;ROME,SECC,T0.3,49.5,79.5,HE S.N.A ...3 CN906 3707-001081 CONNECTOR-OPTICAL;STRAIGHT,SPDIF ...3 T0510 BN97-01812A ASSY SMD-MAIN;BN97-01765A S.N.A ..4 SUB05...
  • Page 28 6 Electrical Parts List Level Loc. No. Code No. Description & Specification Q'ty S.A/S.N.A ..4 D5002 0403-001052 DIODE-ZENER;RD8.2MB,7.7-8.7V,200mW,SOT-2 ..4 D4005 0403-001169 DIODE-ZENER;RLZ16C,15.96-16.51V,500MW,LL ..4 D1002 0403-001425 DIODE-ZENER;BZX84C33,31-35V,350mW,SOT-23 ..4 D3023 0406-001172 DIODE-TVS;CDS3C30GTH,48/-/50V,SMD ..4 D3024 0406-001172 DIODE-TVS;CDS3C30GTH,48/-/50V,SMD ..4 D3025 0406-001172 DIODE-TVS;CDS3C30GTH,48/-/50V,SMD ..4 D3026 0406-001172 DIODE-TVS;CDS3C30GTH,48/-/50V,SMD ..4...
  • Page 29 6 Electrical Parts List Level Loc. No. Code No. Description & Specification Q'ty S.A/S.N.A ..4 D4007 1405-001185 VARISTOR;24Vdc,1.6x0.8x0.36mm,TP ..4 D4008 1405-001185 VARISTOR;24Vdc,1.6x0.8x0.36mm,TP ..4 R110 2007-000060 R-CHIP;100Kohm,1%,1/10W,TP,1608 ..4 R110 2007-000067 R-CHIP;15Kohm,1%,1/10W,TP,1608 ..4 R110 2007-000067 R-CHIP;15Kohm,1%,1/10W,TP,1608 ..4 R110 2007-000070 R-CHIP;0ohm,5%,1/10W,TP,1608 ..4 R110 2007-000070 R-CHIP;0ohm,5%,1/10W,TP,1608 ..4...
  • Page 30 6 Electrical Parts List Level Loc. No. Code No. Description & Specification Q'ty S.A/S.N.A ..4 R110 2007-000072 R-CHIP;47ohm,5%,1/10W,TP,1608 ..4 R110 2007-000072 R-CHIP;47ohm,5%,1/10W,TP,1608 ..4 R110 2007-000072 R-CHIP;47ohm,5%,1/10W,TP,1608 ..4 R110 2007-000072 R-CHIP;47ohm,5%,1/10W,TP,1608 ..4 R110 2007-000072 R-CHIP;47ohm,5%,1/10W,TP,1608 ..4 R110 2007-000072 R-CHIP;47ohm,5%,1/10W,TP,1608 ..4 R110 2007-000074 R-CHIP;100ohm,5%,1/10W,TP,1608 ..4...
  • Page 31 6 Electrical Parts List Level Loc. No. Code No. Description & Specification Q'ty S.A/S.N.A ..4 R110 2007-000074 R-CHIP;100ohm,5%,1/10W,TP,1608 ..4 R110 2007-000074 R-CHIP;100ohm,5%,1/10W,TP,1608 ..4 R110 2007-000074 R-CHIP;100ohm,5%,1/10W,TP,1608 ..4 R110 2007-000074 R-CHIP;100ohm,5%,1/10W,TP,1608 ..4 R110 2007-000074 R-CHIP;100ohm,5%,1/10W,TP,1608 ..4 R110 2007-000074 R-CHIP;100ohm,5%,1/10W,TP,1608 ..4 R110 2007-000074 R-CHIP;100ohm,5%,1/10W,TP,1608 ..4...
  • Page 32 6 Electrical Parts List Level Loc. No. Code No. Description & Specification Q'ty S.A/S.N.A ..4 R110 2007-000090 R-CHIP;10Kohm,5%,1/10W,TP,1608 ..4 R110 2007-000090 R-CHIP;10Kohm,5%,1/10W,TP,1608 ..4 R110 2007-000090 R-CHIP;10Kohm,5%,1/10W,TP,1608 ..4 R110 2007-000090 R-CHIP;10Kohm,5%,1/10W,TP,1608 ..4 R110 2007-000090 R-CHIP;10Kohm,5%,1/10W,TP,1608 ..4 R110 2007-000090 R-CHIP;10Kohm,5%,1/10W,TP,1608 ..4 R110 2007-000090 R-CHIP;10Kohm,5%,1/10W,TP,1608 ..4...
  • Page 33 6 Electrical Parts List Level Loc. No. Code No. Description & Specification Q'ty S.A/S.N.A ..4 R110 2007-000094 R-CHIP;22Kohm,5%,1/10W,TP,1608 ..4 R110 2007-000094 R-CHIP;22Kohm,5%,1/10W,TP,1608 ..4 R110 2007-000094 R-CHIP;22Kohm,5%,1/10W,TP,1608 ..4 R110 2007-000094 R-CHIP;22Kohm,5%,1/10W,TP,1608 ..4 R110 2007-000094 R-CHIP;22Kohm,5%,1/10W,TP,1608 ..4 R110 2007-000094 R-CHIP;22Kohm,5%,1/10W,TP,1608 ..4 R110 2007-000094 R-CHIP;22Kohm,5%,1/10W,TP,1608 ..4...
  • Page 34 6 Electrical Parts List Level Loc. No. Code No. Description & Specification Q'ty S.A/S.N.A ..4 R110 2007-000458 R-CHIP;18Kohm,5%,1/10W,TP,1608 ..4 R110 2007-000669 R-CHIP;2Kohm,1%,1/10W,TP,1608 ..4 R110 2007-000683 R-CHIP;3.3Kohm,1%,1/10W,TP,1608 ..4 R110 2007-000821 R-CHIP;390ohm,1%,1/10W,TP,1608 ..4 R110 2007-000882 R-CHIP;4.7ohm,5%,1/10W,TP,1608 ..4 R110 2007-000882 R-CHIP;4.7ohm,5%,1/10W,TP,1608 ..4 R110 2007-000882 R-CHIP;4.7ohm,5%,1/10W,TP,1608 ..4...
  • Page 35 6 Electrical Parts List Level Loc. No. Code No. Description & Specification Q'ty S.A/S.N.A ..4 RA5032 2011-001011 R-NETWORK;10Kohm,5%,1/16W,L,CHIP,8P,TP,3 ..4 RA5033 2011-001011 R-NETWORK;10Kohm,5%,1/16W,L,CHIP,8P,TP,3 ..4 RA5005 2011-001093 R-NETWORK;100ohm,5%,1/16W,L,CHIP,8P,TP,3 ..4 RA5006 2011-001093 R-NETWORK;100ohm,5%,1/16W,L,CHIP,8P,TP,3 ..4 RA5014 2011-001093 R-NETWORK;100ohm,5%,1/16W,L,CHIP,8P,TP,3 ..4 RA5015 2011-001093 R-NETWORK;100ohm,5%,1/16W,L,CHIP,8P,TP,3 ..4 RA5019 2011-001093 R-NETWORK;100ohm,5%,1/16W,L,CHIP,8P,TP,3 ..4...
  • Page 36 6 Electrical Parts List Level Loc. No. Code No. Description & Specification Q'ty S.A/S.N.A ..4 C120 2203-000189 C-CER,CHIP;100nF,+80-20%,25V,Y5V,1608 ..4 C120 2203-000189 C-CER,CHIP;100nF,+80-20%,25V,Y5V,1608 ..4 C120 2203-000189 C-CER,CHIP;100nF,+80-20%,25V,Y5V,1608 ..4 C120 2203-000189 C-CER,CHIP;100nF,+80-20%,25V,Y5V,1608 ..4 C120 2203-000189 C-CER,CHIP;100nF,+80-20%,25V,Y5V,1608 ..4 C120 2203-000189 C-CER,CHIP;100nF,+80-20%,25V,Y5V,1608 ..4 C120 2203-000189 C-CER,CHIP;100nF,+80-20%,25V,Y5V,1608 ..4...
  • Page 37 6 Electrical Parts List Level Loc. No. Code No. Description & Specification Q'ty S.A/S.N.A ..4 C120 2203-000257 C-CER,CHIP;10nF,10%,50V,X7R,TP,1608 ..4 C120 2203-000257 C-CER,CHIP;10nF,10%,50V,X7R,TP,1608 ..4 C120 2203-000257 C-CER,CHIP;10nF,10%,50V,X7R,TP,1608 ..4 C120 2203-000257 C-CER,CHIP;10nF,10%,50V,X7R,TP,1608 ..4 C120 2203-000257 C-CER,CHIP;10nF,10%,50V,X7R,TP,1608 ..4 C120 2203-000257 C-CER,CHIP;10nF,10%,50V,X7R,TP,1608 ..4 C120 2203-000257 C-CER,CHIP;10nF,10%,50V,X7R,TP,1608 ..4...
  • Page 38 6 Electrical Parts List Level Loc. No. Code No. Description & Specification Q'ty S.A/S.N.A ..4 C120 2203-000783 C-CER,CHIP;0.33nF,5%,50V,C0G,1608 ..4 C120 2203-000783 C-CER,CHIP;0.33nF,5%,50V,C0G,1608 ..4 C120 2203-000783 C-CER,CHIP;0.33nF,5%,50V,C0G,1608 ..4 C120 2203-000783 C-CER,CHIP;0.33nF,5%,50V,C0G,1608 ..4 C120 2203-000783 C-CER,CHIP;0.33nF,5%,50V,C0G,1608 ..4 C120 2203-000783 C-CER,CHIP;0.33nF,5%,50V,C0G,1608 ..4 C120 2203-000783 C-CER,CHIP;0.33nF,5%,50V,C0G,1608 ..4...
  • Page 39 6 Electrical Parts List Level Loc. No. Code No. Description & Specification Q'ty S.A/S.N.A ..4 C120 2203-005005 C-CER,CHIP;100nF,10%,16V,X7R,1608 ..4 C120 2203-005005 C-CER,CHIP;100nF,10%,16V,X7R,1608 ..4 C120 2203-005005 C-CER,CHIP;100nF,10%,16V,X7R,1608 ..4 C120 2203-005005 C-CER,CHIP;100nF,10%,16V,X7R,1608 ..4 C120 2203-005005 C-CER,CHIP;100nF,10%,16V,X7R,1608 ..4 C120 2203-005005 C-CER,CHIP;100nF,10%,16V,X7R,1608 ..4 C120 2203-005005 C-CER,CHIP;100nF,10%,16V,X7R,1608 ..4...
  • Page 40 6 Electrical Parts List Level Loc. No. Code No. Description & Specification Q'ty S.A/S.N.A ..4 C120 2203-005249 C-CER,CHIP;100nF,10%,50V,X7R,1608 ..4 C120 2203-005249 C-CER,CHIP;100nF,10%,50V,X7R,1608 ..4 C120 2203-005249 C-CER,CHIP;100nF,10%,50V,X7R,1608 ..4 C120 2203-005384 C-CER,CHIP;4700nF,+80-20%,10V,Y5V,2012 ..4 C120 2203-005384 C-CER,CHIP;4700nF,+80-20%,10V,Y5V,2012 ..4 C120 2203-005384 C-CER,CHIP;4700nF,+80-20%,10V,Y5V,2012 ..4 C120 2203-005384 C-CER,CHIP;4700nF,+80-20%,10V,Y5V,2012 ..4...
  • Page 41 6 Electrical Parts List Level Loc. No. Code No. Description & Specification Q'ty S.A/S.N.A ..4 C5012 2402-001178 C-AL,SMD;10uF,20%,16V,WT,TP,4.3x4.3x5.8m ..4 C5020 2402-001178 C-AL,SMD;10uF,20%,16V,WT,TP,4.3x4.3x5.8m ..4 C5025 2402-001178 C-AL,SMD;10uF,20%,16V,WT,TP,4.3x4.3x5.8m ..4 C5028 2402-001178 C-AL,SMD;10uF,20%,16V,WT,TP,4.3x4.3x5.8m ..4 C5031 2402-001178 C-AL,SMD;10uF,20%,16V,WT,TP,4.3x4.3x5.8m ..4 C5047 2402-001178 C-AL,SMD;10uF,20%,16V,WT,TP,4.3x4.3x5.8m ..4 C5108 2402-001178 C-AL,SMD;10uF,20%,16V,WT,TP,4.3x4.3x5.8m ..4...
  • Page 42 6 Electrical Parts List Level Loc. No. Code No. Description & Specification Q'ty S.A/S.N.A ..4 T0568 3301-001163 BEAD-SMD;80ohm,2012,TP,-,192ohm/867MHz S.N.A ..4 T0568 3301-001163 BEAD-SMD;80ohm,2012,TP,-,192ohm/867MHz S.N.A ..4 T0568 3301-001176 BEAD-SMD;80ohm,2012,TP,-,- S.N.A ..4 T0568 3301-001236 BEAD-SMD;60ohm,1608,-,-,- S.N.A ..4 T0568 3301-001236 BEAD-SMD;60ohm,1608,-,-,- S.N.A ..4 T0568 3301-001236 BEAD-SMD;60ohm,1608,-,-,-...
  • Page 43 BN92-02908A ASSY LABEL;LE22S81BX/* S.N.A M0045 BN92-02909B ASSY ACCESSORY;LE22S81BX/XEH T0268 3903-000145 CBF-POWER CORD;DT,EU,FP3/YES,U(IEC C13-R T0081 6002-001294 SCREW-TAPPING;BH,+,,M4,L16,ZPC(BLK) T0074 BN59-00609A REMOCON;JASMINE / LILY,TM86,samsung 24p+ BN63-01798A CLOTH-CLEAN;RE40**,CLOTH,180,200,RHCM S.N.A T0531 BN63-03176B COVER-BOTTOM;JASMINE 22,23,26,HIPS,-,-,- BN68-00514E MANUAL FLYER-00,WARRANTY CARD;comm,Samsu S.N.A T0511 BN68-01177J MANUAL USERS;COMM,SAMSUNG,10Language,E.E S.N.A T0091 HA83-00047A LP-TAPEACETATE;T0.1MM,W20MM,L200MM...
  • Page 44 5 Exploded View & Parts List 5 Exploded View and Parts List - You can search for updated part codes through ITSELF web site. URL : http://itself.sec.samsung.co.kr/ 5-1 LE22S81BX Exploded View M0014 T0447 M0215 M0146 M0013 T0175 T0003 M0115 M0027...
  • Page 45 5 Exploded View & Parts List 5-2 LE22S81BX Parts list Location Code.No Item & Specification Q'ty SA/SNA Remark T0003 BN96-05965B ASSY COVER P-FRONT;22S81,EO,,ABS+PMMA,HB T0175 BN96-06066A ASSY SPEAKER P;16ohm,4pin,3W,350/750 S.N.A M0215 BN07-00346A LCD-PANEL;LTM220M1-L01,Doppler,8BIT,493. T0447 BN96-05967B ASSY BRACKET P-PANEL;-,22S81,EO(Ready),- S.N.A M0146 BN61-03425A BRACKET-PANEL SIDE;JASMINE 22,SECC,T1.2 S.N.A M0115...

  • Page 46: O O Perating Instructions And Installation

    10 Operating Instructions and Installation 10 Operating Instructions and Installation 10-1 Front - The product colour and shape may vary depending on the model. 1. SOURCE C/P. Toggles between all the available input sources Press to change channels. (TV - Ext. - AV - S-Video - PC). In the on-screen menu, use the C/P.

  • Page 47: Connection Panel

    10 Operating Instructions and Installation 10-2 Connection Panel - The product colour and shape may vary depending on the model. - Whenever you connect an external device to your TV, make sure that power on the unit is turned off. - When connecting an external device, match the colour of the connection terminal to the cable.
  • Page 48 10 Operating Instructions and Installation Connecting Set-Top Box, VCR or DVD - Connect the VCR or DVD SCART cable (optional) to the SCART connector of the VCR or DVD. - If you wish to connect both the Set-Top Box and VCR (or DVD), you should connect the Set-Top Box to the VCR (or DVD) and connect the VCR (or DVD) to your set.

  • Page 49: Remote Control

    10 Operating Instructions and Installation 10-3 Remote Control 1. Television Standby button 2. Number buttons for direct channel access 3. One/Two-digit channel selection Volume increase Volume decrease 5. Temporary sound switch-off 6. Selects the TV mode dire 7. Displays the main on-screen menu 8.

  • Page 50: Installing The Stand

    For detailed information on installing the wall mount, see the instructions provided with the Wall Mount items. Contact a technician for assistance when installing the wall mounted bracket. Samsung Electronics is not responsible for any damage to the product or injury to yourself or others if you elect to install the TV on your own.
  • Page 51 10 Operating Instructions and Installation Memo 10-6...

  • Page 52: Pcb Diagram

    12 PCB Diagram 12 PCB Diagram 12-1 Main PCB Diagram I/P Board SCALER TDA15001H TSU396AWJ TUNER FILTER FUNCTION SPEAKER 12-1...
  • Page 53 12 PCB Diagram Memo 12-2...
  • Page 54 1 Precautions 1 Precautions Follow these safety, servicing and ESD precautions to prevent damage and to protect against potential hazards such as electrical shock. 1-1 Safety Precautions 1-1-1 Warnings For continued safety, do not attempt to modify the circuit board. Disconnect the AC power and DC Power Jack before servicing.
  • Page 55 1 Precautions 1-2 Servicing Precautions WARNING: An electrolytic capacitor installed with the wrong polarity might explode. Caution: Before servicing units covered by this service manual, read and follow the Safety Precautions section of this manual. Note: If unforeseen circumstances create conflict between the following servicing precautions and any of the safety precautions, always follow the safety precautions.
  • Page 56 1 Precautions 1-4 Installation Precautions 1. For safety reasons, more than two people are 6. Keep the antenna far away from any high-voltage required for carrying the product. cables and install it firmly. Contact with the high- voltage cable or the antenna falling over may 2.
  • Page 57 1 Precautions Memo...
  • Page 58 2 Product Specifications 2 Product specifications 2-1 Fashion Feature -Easy-to-use remote control -Easy-to-use on-screen menu system -Automatic timer to turn the TV on and off -Adjustable picture and sound settings that can be stored in the TV's memory -Automatic channel tuning for up to 194 channels. (Air : 69 , STD : 125 ) -A special filter to reduce or eliminate reception problems -Fine tuning control for the sharpest picture possible -A built-in multi-channel sound decoder for stereo and bilingual listening...
  • Page 59 2 Product Specifications 2-2 LE20S81BX Specifications Item Description LCD Panel : TFT-LCD Panel, RGB Vertical stripe, normaly WHITE, 20-Inch LCD Panel viewable, 0.51(H) x 0.51(V)mm Pixel Pitch Horizontal : 28~33 kHz / Vertical : 50~75Hz Scanning Frequency Display Colors 16.2M color...
  • Page 60 2 Product Specifications 2-3 Spec Comparison Model LE20S81BX LE26R51B / LE32R51B / LE40R51B Design Frequency Horizontal 30 ~ 61 kHz 28 ~ 33 kHz Vertical 60 ~ 75 Hz 60 ~ 75 Hz Display Color 16,777,216 colors 16,194,277 colors PC Resolution...
  • Page 61 2 Product Specifications 2-4 Option Specification Item Item Name Code.No Remark Remote Control & BN59-00437A Batteries (AAA x 2) Power Cord 3903-000042 Cleaning Cloth BN63-01798A 6002-001294 Stand Screw x 4 Stand BN90-01377A BN63-03836A Cover-Bottom...

  • Page 62: Reference Infomation

    14 Reference Infomation 14 Reference Infomation 14-1 Technical Terms -Dot Pitch The image on a monitor is composed of red, green and blue dots. The closer the dots, the higher the res- olution. The distance between two dots of the same color is called the 'Dot Pitch'. Unit: mm -Vertical Frequency The screen must be redrawn several times per second in order to create and display an image for the user.
  • Page 63 -Channel Fine Tuning This feature allows the viewer to fine-tune the TV channel to obtain the best viewing conditions. The Samsung LCD TV has both automatic and manual channel fine-tuning features to enable the viewer to adjust their desired settings.

  • Page 64: Pin Assignments

    14 Reference Infomation 14-2 Pin Assignments 14-2-1 Scart 14-2-2 S-Video Separate Sound R out Sound R In Sound L out Sound L In BL In Video Out 14-2-4 D-SUB Video In Separate 14-2-3 A/V Green Blue RCA Yellow CVBS GND (DDC Return) Audio L GND-Red RCA White...

  • Page 65: Timing Chart

    14 Reference Infomation 14-3 Timing Chart This section of the service manual describes the timing that the computer industry recognizes as standard for com- puter-generated video signals. Table 2-1 Timing Chart VESA Mode VGA2/ VGA3/ 640/75 Hz, 800/75 Hz, 56Hz, 1024/60Hz 1024/75Hz 1280/75Hz, 50Hz...
  • Page 66 14 Reference Infomation 14-4 Preset Timing Modes If the signal transferred from the computer is the same as the following Preset Timing Modes, the screen will be adjusted automatically. However, if the signal differs, the screen may go blank while the power LED is on.

  • Page 67: Panel Description

    14 Reference Infomation 14-5 Panel Description Maker VENDOR P/N PANEL_CODE PANEL_ABB STICKER_CODE Remarks LT140X1-002 BN07-00004A BN68-00239H LT150XS-L01 BN07-00009A LT150XS-L01-B BN07-00022A LTM150XS-L02 BN07-00005A LT181E2-132 BN07-00001A LT150XS-T01 BN07-00010A LTM181E3-132 BN07-00019A LT170E2-131 BN07-10001D LT181E2-131 BN07-10001E LTM170E4-L01 BN07-00018A LTM240W1-L01 BN07-00015A LTM213U3-L01 BN07-00016A LTM150XH-L01 BN07-00026A LTM150XH-L03 BN07-00027A LTM150XS-L01...
  • Page 68 14 Reference Infomation Maker VENDOR P/N PANEL_CODE PANEL_ABB STICKER_CODE Remarks LTM170W1-L01 BN07-00112A Color coordinates change 0.280/0.290, 10000k & ZPD Panel LTM170EH-L05 BN07-00113A Color coordinates change 0.280/0.290, 10000k & ZPD Panel LTM220W1-L01 BN07-00114A ZPD Panel for AMLCD 22" TV LTM150XH-L06 BN07-00117A ZPD Panel code LTM153W1-L01 BN07-00118A...
  • Page 69 14 Reference Infomation Maker VENDOR P/N PANEL_CODE PANEL_ABB STICKER_CODE Remarks LTA460W2-L03 BN07-00187A BEETOVEN 46"ZPD new panel LTM240M1-L01 BN07-00195B 24" igh brightness panel ZPD code derivation M170EX-L21 BN07-00206A AMLCD LTM170EX-L21 ZPD new code derivation LTA460H3-L01 BN07-00200A AMLCD 46" LED BLU panel LTM170EU-L15 BN07-00214A AMLCD EU-L15 TV high brightness ZPD new code derivation...
  • Page 70 14 Reference Infomation Maker VENDOR P/N PANEL_CODE PANEL_ABB STICKER_CODE Remarks TORISAN TM181SX-76N01 BN07-00048A TORISAN TM150XG-26L06 BN07-00059A 15" XGA TN MODE(ZPD) TORISAN TM290WX-71N31 BN07-00063A "RS24NS (TORISAN 29"" NEW PANEL)" TORISAN TM396WX-71N31 BN07-00064A "RS24NS (TORISAN 40"" NEW PANEL)" TORISAN TM150XG-26L09 BN07-00073A "Panel for 15"" TV" TORISAN TM150XG-26L10 BN07-00089A...
  • Page 71 14 Reference Infomation Maker VENDOR P/N PANEL_CODE PANEL_ABB STICKER_CODE Remarks ACER M170EN05 BN07-00102A ZPD Panel code ACER M190EN02 BN07-00170A "AU Monitor 19"" new panel development (P19-1S)" ACER M190EN02 BN07-00170B "AU 19"" ZPD code derivation (ZPD)" ACER M170EN06 BN07-00171A "AU Monitor 17"" New panel development " ACER T260XW01 BN07-00163A...
  • Page 72 9 Schematic Diagrams 9 Schematic Diagrams -This Document can not be used without Samsung's authorization. 9-1 Power_Function Schematic Diagram...
  • Page 73 9 Schematic Diagrams -This Document can not be used without Samsung ’ s authorization. 9-2 Sound Processing Schematic Diagram...
  • Page 74 9 Schematic Diagrams -This Document can not be used without Samsung ’ s authorization. 9-3 Input & Output jack I Schematic Diagram...
  • Page 75 9 Schematic Diagrams -This Document can not be used without Samsung ’ s authorization. 9-4 Input & Output jack II Schematic Diagram...
  • Page 76 9 Schematic Diagrams -This Document can not be used without Samsung ’ s authorization. 9-5 MST68980BL Schematic Diagram...
  • Page 77 9 Schematic Diagrams -This Document can not be used without Samsung ’ s authorization. 9-6 DDR & Tuner Schematic Diagram...
  • Page 78 4 Troubleshooting 4 Troubleshooting 4-1 First Checklist for Troubleshooting 1. Check the various cable connections first. - Check to see if there is a burnt or damaged cable. - Check to see if there is a disconnected cable connection or a connection is too loose. - Check to see if the cables are connected according to the connection diagram.
  • Page 79 4 Troubleshooting 4-2 Checkpoints by Error Mode 4-2-1 No Power Does proper DC 14V/5V Check connector Pin3, Pin9 in appear at Pin 3. Pin 9 of I/P Board. CN100? Does proper DC A5V Check IC101 and IC105. appear at FT144? Does proper B3.3V Check IC102.
  • Page 80 4 Troubleshooting WAVEFORMS...
  • Page 81 4 Troubleshooting 4-2-2 No Picture (TV, Video, S-Video, Component) Check R882(TV) Check C884(Video) Check the input signal. Check C851, C852(S-Video)? Check the IC800,IC500. WAVEFORMS...
  • Page 82 4 Troubleshooting 4-2-3 No Sound Does the signal appear at Check the TU01 (TV Tuner) C883,C880(TV) and Check the CN913 (Video, S-Video) C849, C850(PC) and Check the CN909 Pin 117 of IC800 (VCTj)? Does the signal appear at Check IC800. R858, R859? Does the signal appear Check the IC600 (Audio amp)
  • Page 83 4 Troubleshooting Memo...
  • Page 84 8 Wiring Diagrams 8 Wiring Diagram CN100(9P) : To IP Board CN402(50P) : To 20" Panel CN402 CN905 CN906 CN905(5P) : To Program Download Jig CN906(20P) : To Scart CN600(3P) : To Left Speaker CN601(2P) : To Right Speaker CN907(12P) : To Function Board Audio Scaler Processor...
  • Page 85 8 Wiring Diagrams Memo...

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