Samsung LW20M22CP User manual

TFT-LCD TV
Chassis Model
GPL15KE LW15M23CP
LW15M25CP
GPL17KE LW17M24CP
GPL20KE LW20M21CP
LW20M22CP
LW20M25CP
Manual
SERVICE
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 problems
- Fine tuning control for the sharpest picture
possible
- Built-in, dual channel speakers
- Headphone jack for private listening

Samsung Electronics Co.,Ltd.
416, Maetan-3Dong, Yeongtong-Gu, Suwon City,
Gyeonggi-Do, Korea, 443-742
Printed in Korea
P/N : BN82-00131H-01
URL : http://itself.sec.samsung.co.kr/
- This Service Manual is a property of
Samsung Electronics Co., Ltd.
Any unauthorized use of Manual can be
punished under applicable International
and/or domestic law.

7 Block Diagrams
7-1
7 Block Diagram

Memo
7 Block Diagrams
7-2

13 Circuit Descriptions
13-1
13 Circuit Descriptions
13-1 Overall Block Structure

13 Circuit Descriptions
13-2
13-2-1 MAIN BOARD POWER TREE
13-2 Partial Block Description

13 Circuit Descriptions
13-3
13-2-2 WIRING DIAGRAM
CN100(9P) : To IP Board
CN401(30P) : To 15",17" Panel
CN402(50P) : To 20" Panel
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

13 Circuit Descriptions
13-4

3 Alignments and Adjustments
3-1
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 Alignments and Adjustments
3-2
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
- If you have Factory remote - control
3-3 Factory Data
PC Auto Color
Video Auto Color
Reset
DLC/MWE Part
SFR PART
Sub Adjust
UOC Adjust
Option
Checksum
Panel Information
Bus Stop : OFF
Service
2005/06/23
T-pls25nus-0906
¢”
¢”
¢”
¢”
¢”
¢”
¢”
¢”
¢”
¢”
¢”
¢”
¢”
¢”
¢”
¢”
¢”
¢”
¢”
¢”
¢”
¢”
Adjust
PC Auto Color
Option
Checksum
Panel Information
Reset
Bus Stop
Service Function
2005/04/20
TM-BRHMS20WW-0714
¢”
¢”
¢”
¢”
¢”
¢”
¢”
¢”
¢”
¢”
¢”
¢”
PC Auto Color
Video Auto Color
Reset
DLC/MWE Part
SFR PART
Sub Adjust
UOC Adjust
Option
Checksum
Panel Information
Bus Stop : OFF
Service
2005/04/20
TM-BRHMS20WW-0714
¢”
¢”
¢”
¢”
¢”
¢”
¢”
¢”
¢”
¢”
¢”
¢”
¢”
¢”
¢”
¢”
¢”
¢”
¢”
¢”
¢”
¢”
-. OSD which the basic adjustment is added.
PC Auto Color
Video Auto Color
Reset
DLC/MWE Part
SFR PART
Sub Adjust
UOC Adjust
Option
Checksum
Panel Information
Bus Stop : OFF
*. 2005/06/23: MCU firmware date.
*. T-PLUS25NUS-0906: MCU firmware version information
(this information must be appended due to a compatibility problem report.)
1) Reset: Factory reset
2) Bus Stop: The communication Line ON / OFF
Move to the ( - ) / (+) key, select the 'Enter' key.
3) Auto adjustment
4) PC Auto Color/ Video Auto Color :in case that color
of all screen is wrong, excute the PC Auto color at
16 gray pattern(refer to attach left 16gray pattern)
5) Checksum: MCU firmware checksum information
(this information must be appended due to a compatibility problem report.)