Service Manuals, User Guides, Schematic Diagrams or docs for : Samsung LCD TV LA-32 37 40-R81WX-R81BX samsung_la-32_37_40-r81wx-r81bx

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TFT-LCD TV
Chassis GBP32ASA
GBP37SEN
GBP40SEN

Model LA32R81WX
LA37R81BX
LA40R81BX

SERVICE Manual

TFT-LCD TV Fashion Feature

- Luxurious Slim Design

- Supreme Picture Quality

- Supreme Sound Quality

- Supreme Convenience Quality

- Convenience for Users
Copyright Trademarks

2007 by Samsung Electronics Co., Ltd. Samsung is the registered trademark of Samsung
Electronics Co., Ltd.
All rights reserved.
LA32R81WX/LA37R81BX/LA40R81BX
This manual may not, in whole or in part, be copied, Service Manual and Macmaster Cable Adapter are
photocopied, reproduced, translated, or converted to any trademarks of Samsung Electronics 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.
LA32R81WX/LA37R81BX/LA40R81BX
Service Manual All other trademarks are the property of their respective
owners.
First edition March 2007.

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.................................................................................................................................... 1-3

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

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

2-2 LA32R81BX Specifications .............................................................................................................................. 2-2

2-3 LA37R81BX Specifications .............................................................................................................................. 2-3

2-4 LA40R81BX 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 ................................................................................................................................................ 3-3

3-4 Service Adjustment ....................................................................................................................................... 3-11

3-5 Software Upgrade ....................................................................................................................................... 3-14

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 LA32R81WX Exploded View ........................................................................5-1
5-2 LA32R81WX Parts list ........................................................................ 5-2
5-3 LA37R81BX Exploded View ........................................................................ 5-3
5-4 LA37R81BX Parts list ........................................................................... 5-4
5-5 LA40R81BX Exploded View ........................................................................ 5-5
5-6 LA40R81BX Parts list ........................................................................... 5-6
6. Electrical Parts List ...........................................................................6-1
6
6-1 LA32R81WX Parts List ........................................................................ 6-1
6-2 LA37R81BX Parts List ........................................................................ 6-25
6-3 LA40R81BX Parts List ........................................................................ 6-43
7. Block Diagram .................................................................................7-1
7

8. Wiring Diagram .................................................................................8-1 8
9. Schematic Diagrams .................................................................................9-1 9
10. Operating Instructions and Installation ...............................................................10-11
10-1 Front ....................................................................................... 10-1
10-2 Viewing the Connection Panel .................................................................. 10-2
10-3 Remote control ................................................................................. 10-4
10-4 Installation the Stand ........................................................................ 10-5
10-5 Installing the Wall Mount Kit ..................................................................... 10-5
11. Disassembly and Reassembly.....................................................................11-1 1
11-1 Disassembly .............................................................................. 11-1
11-2 Reassembly .............................................................................. 11-5
12. PCB Diagram ....................................................................................12-1
1
12-1 Main PCB Diagram (Without Card Slot) ............................................................... 12-1
12-2 Main PCB Diagram (With Card Slot) ..................................................................12-2
13. Circuit Descriptions ...........................................................................13-1
1
Contents
13-1 Main Signal Description .............................................................................................................................. 13-1

13-2 DTV Signal Description .............................................................................................................................. 13-2

13-3 RF/DTV Tuner (DNOS403MH261B(S)) SPEC. ................................................................................................ 13-3

13-4 DTV MAIN ChipSet .................................................................................................................................... 13-9

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

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

14-2 Pin Assignments ....................................................................................................................................... 14-4

14-3 Timing Chart ............................................................................................................................................. 14-7

14-4 Panel Description .................................................................................................................................... 14-11
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 : BN82-00196B-00
and/or domestic law. URL : http://itself.sec.samsung.co.kr/
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. Correct impedance matching is essential.
4. Avoid overload. Excessive signal from a sweep generator might overload the front-end
of the TV. When inserting signal markers, do not allow the marker generator to distort
test result.
5. Connect the TV only to an AC power source with voltage and frequency as specified on
the backcover nameplate.
6. Do not attempt to connect or disconnect any wire while the TV is turned on. Make sure
that the power cord is disconnected before replacing any parts.
7. To protect aganist shock hazard, use an isolation transform.

3-1
3 Alignments and Adjustments

3-2 How to Access Service Mode
3-2-1 Entering Factory Mode
" "

Power OFF INFO MENU MUTE Power ON

- If you have Factory remote - control

PICTURE ON DISPLAY FACTORY

- The buttons are active in the service mode.
1. Remote - Control Key : Power, Arrow Up, Arrow Down, Arrow Left
Arrow Right, Menu, Enter, Number Key(0~9)
2. Function - Control Key : Power, CH +, CH -, VOL +, VOL -,
Menu, TV/VIDEO(Enter)

3-2-2 Panel Check

You have to check Panel Maker Because of different adjustments as follows.
First of all, Check the label rating!

1) Label Rating File

- LCD PANEL MARK -
A:ACER(AUO) S : SEC C : CMO * If not printed you could consider S(sec) panel mark.

2) If Panel Mark is "A", Set the factory mode indicating as follows.
* Option Byte
1. Inch Option 32"
2. Gamma 32"AUO
3. Panel Option AUO

Others are same shown below.

3-2
3 Alignments and Adjustments

3-3 Factory Data
1. Calibration
2. Service
3. White Balance
4. SVP-UX
5. Option Block
6. SGTV5810/NTP3000
7. YC Delay
8. Option Table
9. I2C Check
10. W/B MOVIE
11. Checksum
12. Reset
13. Spread Spectrum
T-BDPMPEUD-xxxx (Main Micom Ver)
T-BDPMPEUS-xxxx
BORD2_CALLA_TR-xxxx (Sub Micom Ver)
Month / Day / Year / Hour / Min. / Sec.

1. Calibration
1) AV Calibration
2) COMP Calibration
3) PC Calibration
4) HDMI Calibration

2. Option Table XXXX XXXX

No Item Range
1 Ready ON/OFF OFF
2 Inch Option 23"/ 26" / 32"

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