SAMSUNG CL21M40MQGXXAO Service Manual

COLOR TELEVISION

Chassis : KS9C(N)MI
Model : CL21M40MQGXXAO

COLOR TELEVISION FEATURES

■

Turbo Sound

■■

Sound Equalizer

■

New Structure Design

SERVICE

Manual

CL-21M40MQ

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.

© Samsung Electronics Co., Ltd. Sep. 2006

Printed in Korea

AA82-03964A

Table of Contents

Chapter 1 Precaution

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

■ 1-2 Servicing Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

■ 1-3 Static Electricity Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

■ 1-4 Installation Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Chapter 2 Product Specification

■ 2-1 Product Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

■ 2-2 Key Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

■ 2-3 Specifications Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

■ 2-4 Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Chapter 3 Alignment & Adjustment

■ 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

■ 3-5 Replacements & Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

Chapter 4 Exploded View & Part List

■ 4-1 CL21M40MQGXXAO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Chapter 5 Electrical Part List

■ 5-1 CL21M40MQGXXAO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1

Chapter 6 Troubleshooting

■ 6-1 Checkpoints by Error Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

■ 6-2 Troubleshooting Procedures by Error Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2

■ 6-3 Troubleshooting Procedures by ASS'Y . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3

■ 6-4 Troubleshooting by Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-5

Chapter 7 Block Diagram

■ 7-1 Overall Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-1

■ 7-2 Partial Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2

Chapter 8 Wiring Diagram

■ 8-1 Overall Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-1

■ 8-2 Pin Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8-2

Chapter 9 PCB Diagram

■ 9-1 Main Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-1

■ 9-2 CRT Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9-3

Chapter 10 Schematic Diagram

■ 10-1 Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-1

■ 10-2 Micom . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-2

■ 10-3 Audio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-3

■ 10-4 Side A/V & CRT Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10-4

Alignment & Adjustment

Samsung Electronics 3-1

3. Alignment & Adjustment

3-1 Service Instruction

1. General Adjustment :
In general, a color TV can provide ideal visual quality by adjusting the basic settings such as the vertical size, horizontal size,
focus, etc.
Display a black and white picture on the screen to check if the picture is clearly displayed.
If there are some 'spotted' points on the screen when displaying a black and white picture, degauss the screen using the
degauss coil. If the spotted points remain, re-adjust the purity and the convergence. This completes the basic performance
examination.

Notice.

■ These adjustments and the check list are only applied to KS9C chassis-applied models.

■ use 110v for the measurement set. It is recommended using an

insulation transformer when supplying power to the set so as to prevent shock to the set or to yourself.

■ These adjustment specifications have been created on the basis of the domestic KS9C chassis-applied remote

control model. Some of the contents may be changed subject to the sales location and the product specifications.

2. When replacing the Main Board :
Focus adjustment, screen voltage setting and W/B adjustment are all required.

3. When replacing the CRT Ass'y : No adjustments required.

Alignment & Adjustment

3-2 Samsung Electronics

3-2 How to Access Service Mode

MENU Show all menus

▲ / ▼

Move the cursor to select an item.

◀ / ▶

Adjust the selected configuration value

1. To enter Service Mode, press the keys on the remote control according to the following sequence. (in Stand-by status)

Info → Menu →MUTE→ power On

※ When failing to enter Service Mode, repeat the procedure above.

2. The initial screen of Service Mode.

3. Functions of the Keys within Service Mode

ADJUST
OPTION
G2-ADJUST
CHCKSUM
RESET
T-FMTNUS

Alignment & Adjustment

Samsung Electronics 3-3

3-3 Factory Data

★ The underlined are items applied during the service adjustment. None of the others should be adjusted.

1.T-FMTNUS

No Item Adjust/Fix Initial Remark

1 HS Adjust 37

2 VA Adjust 34

3 VSL Adjust 30

4 VS FIX 31

5 AGC Adjust 33

6 CDL FIX 9

7 SCT Adjust 10

8 SBT Adjust 7

9 BLR Adjust 28

10 BLB Adjust 43

11 RG Adjust 30

12 GG FIX 32

13 BG Adjust 46

14 SC FIX 29

15 STT FIX 29

16 AKB FIX 0

17 NDL FIX 1

18 NSR FIX 5

19 VOL FIX 10

20 MVOL FIX 7

21 RPO0 FIX 1

22 RPO1 FIX 1

23 CAP FIX 12

24 FMWS FIX 0

25 AGCS FIX 1

26 OMD FIX 15

27 SCL FIX 3

28 PWL FIX 13

29 MUS FIX 1

30 SCBT FIX 40

31 SSP FIX 5

32 DNSR FIX 17

33 DSBT FIX 0

34 DCDL FIX 6

35 DBLR FIX 32

36 DBLB FIX 32

37 DSK FIX 0

Alignment & Adjustment

3-4 Samsung Electronics

2.Option

3.White Balance

No Item Initial 21"FLAT Remark

1 Video Mute Off Off

Video Mute time between the Channel
changes

2 Audio STEREO STEREO Audio MONO/STEREO Option

3 2ND SIF EXTERNAL EXYERNAL SIF Option

4 Auto Power Off Off

Turns on automatically when the Master
Power is turned ON

5 Audio Mute On On

Mutes the Audio when the there is no
source signal

6 Start Language English English

Preset OSD (On-Screen Display) laguage
at time of purchase

7 Hotel Mode Off Off

8 Blue Screen On On

Blue Screen when there is no source signal

9 V-Chip Off Off

10 AV Option AV1/2/DVD/SV AV1/2/DVD Back Jack Option

11 AFN Off Off

No Item 21"FLAT Remark

1 Hight Light 275/265/45FL

2 Low Light 275/265/1.5FL

Alignment & Adjustment

Samsung Electronics 3-5

Alignment & Adjustment

3-6 Samsung Electronics

3-4 Service Adjustment

3-4-1 Adjusting the Picture Size

■ Since the KS9C chassis has the deflection settings data within the Factory Data, the picture size has to be adjusted when

replacing Main Board, according to the following procedures.

① Display the Lion pattern.

② Press "Power Off →MUTE→1→8→2→Power On "

using the remote control and enter Factory Mode.

③ Enter Deflection Mode.

④ Adjust the VA, VS,VSL and HS items so

that the width becomes 5 and the height becomes 4.

Alignment & Adjustment

Samsung Electronics 3-7

3-4-2 Adjusting the Picture Straight Lines

① Display the Cross Hatch pattern.

② Adjust settings other than VA,VH and HS so that straight lines are displayed without curves.

④ When the adjustments are complete, display the Lion pattern and check that the picture size has not been changed.

If there is no change, finish the adjustments.

③ Adjust the V-Linearity and V-SC settings so that the

intervals of the horizontal lines become uniform.