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TFT-LCD TV
Chassis GPL15KE
GPL17KE
GPL20KS

Model LA15S51BP
LS17M24CP
LA20S51BP




SERVICE Manual

TFT-LCD TV Fashion Feature
- Easy-to-use remote control

- Easy-to-use on-screen menu system

- Automatic timer to turn the TV on and off

- Automatic channel tuning for up to 194
channels. (Air : 69 , STD : 125 )

- A special filter to reduce or eliminate reception
LS17M24C problems

- Fine tuning control for the sharpest picture
possible

- Built-in, dual channel speakers

- Headphone jack for private listening




LA15S51BP / LA20S51BP
Copyright Trademarks
2006 by Samsung Electronics Co., Ltd. Samsung is the registered trademark of Samsung
Electronics Co., Ltd.
All rights reserved.
LA15S51BP/LS17M24CP/LA20S51BP and Macmaster
This manual may not, in whole or in part, be copied, Cable Adapter are trademarks of Samsung Electronics
photocopied, reproduced, translated, or converted to any Co., Ltd.
electronic or machine readable form without prior
written permission of Samsung Electronics Co., Ltd. Macintosh and Power Macintosh are trademarks of
Apple Computer, Inc.
LA15S51BP/LS17M24CP/LA20S51BP Service
Manual All other trademarks are the property of their respective
owners.
First edition April 2006.
Printed in Korea.


ii
Contents
1. Precautions .........................................................................................................................................................1-1
1

1-1 Safety Precautions ....................................................................................................................................... 1-1

1-2 Servicing Precautions .................................................................................................................................... 1-2

1-3 Static Electricity Precautions ........................................................................................................................... 1-2

1-4 Installation Precautions.................................................................................................................................... 1-4



2. Product specifications ..........................................................................................................................................2-1
2

2-1 Fashion Feature ............................................................................................................................................. 2-1

2-2 LA15S51BP Specifications .............................................................................................................................. 2-2

2-3 LS17M24CP Specifications .............................................................................................................................. 2-3

2-4 LA20S51BP Specifications .............................................................................................................................. 2-4

2-5 Spec Comparison .......................................................................................................................................... 2-5

2-6 Option Specification ....................................................................................................................................... 2-6



3. Alignments and Adjustments .................................................................................................................................3-1
3

3-1 Service Instruction ....................................................................................................................................... 3-1

3-2 How to Access Service Mode ........................................................................................................................... 3-2

3-3 Factory Data ................................................................................................................................................ 3-2

3-4 Service Adjustment ....................................................................................................................................... 3-5



4. Troubleshooting ................................................................................................................................................4-1
4

4-1 First Checklist for Troubleshooting .....................................................................................................................4-1

4-2 Checkpoints by Error Mode .............................................................................................................................. 4-2



5. Exploded View and Parts List .................................................................................................................................5-1
5

5-1 LA15S51BP Exploded View.............................................................................................................................. 5-1

5-2 LA15S51BP Parts List .................................................................................................................................... 5-2

5-3 LS17M24CP Exploded View ........................................................................................................................... 5-3

5-4 LS17M24CP Parts List .................................................................................................................................... 5-4

5-5 LA20S51BP Exploded View.............................................................................................................................. 5-5

5-6 LA20S51BP Parts List .................................................................................................................................... 5-6



6. Electrical Parts List .............................................................................................................................................6-1
6

6-1 LA15S51BP Parts List .................................................................................................................................... 6-1

6-2 LS17M24CP Parts List ................................................................................................................................. 6-11

6-3 LA20S51BP Parts List ................................................................................................................................. 6-21
Contents
7. Block Diagram ...................................................................................................................................................7-1
7



8. Wiring Diagram ...................................................................................................................................................8-1
8



9. Schematic Diagrams .............................................................................................................................................9-1
9



10. Operating Instructions and Installation.....................................................................................................................10-1
1

10-1 Product Features ....................................................................................................................................... 10-1

10-2 Installation Notes and Precautions .................................................................................................................. 10-4



11. Disassembly and Reassembly ..............................................................................................................................11-1
1

11-1 LS17M24CP Disassembly ........................................................................................................................... 11-1

11-2 LA15S51BP/LA20S51BP Disassembly ............................................................................................................ 11-3

11-3 Reassembly ............................................................................................................................................. 11-4



12. PCB Diagram ...................................................................................................................................................12-1
1

12-1 Main PCB Diagram .................................................................................................................................... 12-1



13. Circuit Descriptions .............................................................................................................................................13-1
1

13-1 Overall Block Structure................................................................................................................................. 13-1

13-2 Partial Block Description .............................................................................................................................. 13-2



14. Reference Infomation ....................................................................................................................................... 14-1

14-1 Technical Terms ....................................................................................................................................... 14-1

14-2 Pin Assignments ....................................................................................................................................... 14-3

14-3 Timing Chart ............................................................................................................................................. 14-4

14-4 Preset Timing Modes ................................................................................................................................. 14-5

14-5 Panel Description ....................................................................................................................................... 14-6
Samsung Electronics Co.,Ltd.
- This Service Manual is a property of 416, Maetan-3Dong, Yeongtong-Gu, Suwon City,
Samsung Electronics Co., Ltd. Gyeonggi-Do, Korea, 443-742
Any unauthorized use of Manual can be Printed in Korea
punished under applicable International P/N : BN82-00131M-00
and/or domestic law. URL : http://itself.sec.samsung.co.kr/