SAMSUNG CL21M6WKX-XAO, CL21A11MQKXXAX Service Manual

COLOR TELEVISION RECEIVER

Chassis : K57A(N) Model : CL21M6WKX/XAO

CL21A11MQKXXAX

COLOR TELEVISION RECEIVER CONTENTS

Precautions

Specifications and IC Data

Disassembly and Reassembly

Alignment and Adjustment

Troubleshooting

Exploded View and Parts List

Electrical Parts List

Block Diagram

Wiring Diagram

Schematic Diagrams

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

2-2 Samsung Electronics

2-2 IC Line Up

Specifications and IC Data

Table 2-1 IC Line-Up

Loc. No

IC201S

IC301

IC501

IC602

IC801S

IC802 KA7632

IC202

PC801S PC802S

IC101

IC601

ICP01

Specification

SPM-464A

LA7845

TDA6108QJF

TDA7297

KA5Q1265R

M24C08

TCET1108 / LTV817B

LA7510

MSP-3425G-B8

VIPER12AD1P

Description

TDA9592 PS/NI, SPM-464A,64P

VERTICAL OUTPUT

RGB DRIVE AMP

SOUND-AMP (15W x 2CH)

POWER IC (STR)

CUSTOM REGULATOR (5V, 8V, 3.3V)

EEPROM

PHOTO COUPLER

IF DETECTOR-IC

Sound Processor

PWM CONTROCER-IC

Remark

Philips

Sanyo

Philips

FIAIR CHILD

TEMIC

Micronas

ICW01

ICG01

NJM2235D

4558

VIDEO Swiching-IC

OP AMP-IC

Alignment and Adjustments

Samsung Electronics 4-1

4. Alignment and Adjustments

4-1 Preadjustment

4-1-1 Factory Mode

1. Do not attempt these adjustments in the Video Mode.

2. The Factory Mode adjustments are necessary when either the EEPROM (IC202) or the CRT is replaced.

3. Do not tamper with the “Adjustment” screen of the Factory Mode menu. This screen is intended only for factory use.

4-1-2 When EEPROM (IC202) Is Replaced

1. When IC202 is replaced all adjustment data revert to initial values. It is necessary to re-program this data.

2. After IC202 is replaced, warm up the TV for 10 seconds.

4-1-3 When CRT Is Replaced

1. Make the following adjustments AFTER setting up after setting up purity and convergence :

White Balance Sub-Brightness Vertical Center Vertical Size Horizontal Size Fail Safe (This adjustment must be the last step).

2. If the EEPROM or CRT is replaced and set SC as 30(factory mode).

4-2 Factory/Service Mode

4-2-1 Procedure for the “Adjustment” Mode

1. This mode uses the standard remote control. The Service Mode is activated by entering the following remote-control sequence :

(1) DISPLAY → FACTORY.

(2) STAND-BY → MUTE → 1 → 8 → 2

→POWER ON.

2. The “SERVICE (FACTORY)” message will be displayed. The Service Mode has four components: ADJUST, OPTION , G2-ADJUST and RESET.

3. Access the Adjustment Mode by pressing the “VOLUME” keys ( Up or Down). The adjustment parameters are listed in the accompanying table, and selected by pressing the CHANNEL keys ( , ).

4. Selection sequences for the all system:

DOWN or UP key:

SCT>SBT>BLR>BLB>RG>GG>BG>VSL>VS> VA>HS>SC>CDL>STT>AKB>NDL>NSR> SCBT>VOL>CAP>MVOL>RP00>RP01> AGCS>OMD>SCL>PWL>MUS>AGC> HPAR>HBOW>EWID>EPAR>EUCN>ELCN> ETRP>VZ>SVM>VMA>SSP>PSNS> DNSR>DSBT>DCDL>DBLR>DBLB>DSK

5. The VOLUME keys increase or decrease the adjustment values (stored in the non-volatile memory) when Adjustment Mode is cancelled.

6. Cancel the Adjustment Mode by re-pressing the “FACTORY” or “Power OFF” keys.

4-2-2 Main Adjustment Parameter

Alignment and Adjustments

4-2 Samsung Electronics

ONO SD F UN CT I ON R A N GE I NI TI AL D ATA SELECTION RE MARK

1

SCT Sub Cont rast 0 ~ 23

2

SBT Sub Bright nes s

3

BLR

4

BLB

Black Level offset R

Black Level offset B

0~23

0~63

13

32

ADJ

9

ADJ

5

RG Red Gain 0~63

6

GG Green Gai n 0 ~ 63

7

BG Bl ue Gai n 0 ~ 63

8

VSL Ver t ical S lope 0 ~ 63

9

VS Ver t ical Shif t 0 ~ 63

10

VA Vert ical Amplitude 0 ~ 63

11

HS Horizontal Shif t 0 ~ 63

12

SC S- Corr ec t i on 0 ~ 63

13

CDL Cathode Drive Level 0 ~ 15

14

STT Sub Tint 0 ~ 7

15

AKB AKB On / off 0 ~ 1

NDL NTSC Delay 0 ~ 15

16

17

NSR NTSC Sub color 0 ~ 23

SCBT Screen Brighrtness 0 ~ 63

18

VOL Volume pre s et t i ng 0 ~ 63

19

CAP Caption Position

20

21

22

23

24

25

26

27

28

29

30

31

32

MVOL

RP00

RP01

AGCS

OMD

SCL

PWL

MUS

AGC

HPAR

HBOW

EWID

Melody Volume

Ratio Pre / overshoot

IF AGC Speed

Offset IF Demodulator

Soft Clipping Level

Peak White Limitting

Color Matrix

Automatic Gain Control

Horizontal Parallelogram

Horizontal Bow

EW Width

0~15

0~50

0~1

0~3

0~63

0~3

0~15

0~1

0~63

28

25

31

27

31

32

30

29

11

36

10

12

15

33

32

ADJ

FIX

ADJ

FIX

ADJ

FIX

5

0

1

5

7

1

3

1

FIX

ADJ

Alignment and Adjustments

Samsung Electronics 4-3

ONO SD F UN CT I ON R A N GE I NI TI AL D ATA SELECTION RE MARK

33

34

EPAR

EUCN

EW Parabola

EW Upper Coner

0~63

32

12

ADJ

35

36

37

38

39

40

41

42

43

44

45

46

47

ELCN

ETRP

VZ

SVM

VMA

SSP

PSNS

DNSR

DSBT

DCDL

DBLR

DBLB

DSK

EW Lower Coner

EW Trapezium

Vertical Zoom

Delay of RGB to VM Output

Amplitude of SVM Output

Sub Sharpness

Identification sens

NSR in DVD mode

SBT in DVD mode

CDL in DVD mode

BLR in DVD mode

BLB in DVD mode

Dynamic Skin Tone Control

0~63

0~3

0~20

0~1

0~23

0~16

0~63

0~1

12

48

10

32

ADJ

FIX

0

3

5

1

5

4

0

FIX

Alignment and Adjustments

4-4 Samsung Electronics

4-2-3 Option Bytes

In the Service Mode, various can be selected via the Option Table. Example:

Option Table : xx xx

1

2

3

4

5

6

7

8

9

10

11

OSD

SYSTEM

VIDEO MUTE

ZOOM

AUTO POWER

AUDIO MUTE

START LANG.

HOTEL MODE

BULE SCREEN

V-CHIP

AV OPTION

TILT

SETTING

CT-N EN/SP/FR

OFF

NOR/ZOOM

OFF

ON

ENGLISH

OFF

ON

AV1/AV2/S-V/DVD

ON

REMARK

- Language

- Video Mute On/Off changing the channel

- Picture Size Option

- Master S/w Option

- Audio Mute On/ Off without signal

- Inital Language agter Factory Reset

- Hotel mode On/ Off

- Bule Screen On/ Off without signal

- V-CHIP ON/OFF (U.S.A)

- AV + S-V + DVD

- TILT ON/OFF

12

13

14

DEMO

EXT COMB

V-Guard

OFF

ON

- DEMO ON/OFF

- External 2H-COM ON/OFF

- Vertical Guard ON/OFF (*MAIN PCB A LOT : OFF)

Alignment and Adjustments

Samsung Electronics 4-5

4-3 Other Adjustments

4-3-1 General

1. Usually, a color TV needs only slight touchup adjustment upon installation. Check the basic characteristics such as height, horizontal and vertical sync and focus.

2. The picture should have good black and white details. There should be no objectionable color shading; if color shading is present, perform the purity and convergence adjustments described below.

3. Use the specified test equipment or its equivalent.

4. Correct impedance matching is essential.

5. 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 results.

6. Connect the TV only to an AC power source with voltage and frequency as specified on the backcover nameplate.

7. Do not attempt to connect or disconnect any wires while the TV is turned on. Make sure that the power cord is disconnected before replacing any parts.

8. To protect against shock hazard, use an isolation transformer.

4-3-2 Automatic Degaussing

A degaussing coil is mounted around the picture tube, so that external degaussing after moving the TV should be unnecessary. But the receiver must be properly degaussed upon installation.

The degaussing coil operates for about 1 second after the power is switched ON. If the set has been moved or turned in a different direction, disconnect its AC power for at least 30 minutes.

If the chassis or parts of the cabinet become magnetized, poor color purity will result. If this happens, use an external degaussing coil. Slowly move the degaussing coil around the faceplate of the picture tube and the sides and front of the receiver. Slowly withdraw the coil to a distance of about 6 feet before removing power.

4-2-4 RESET

The Reset Mode is used during factory inspection. Function Reset:

1. Picture Mode Dynamic

2. Sound Mode Custom

3. Auto Volume Off

4. Melody On

5. Surround Off

6. Turbo Sound Off

7. MTS Stereo

8. Language English

9. Caption Off

10. Timer Off

Alignment and Adjustments

4-6 Samsung Electronics

4-3-3 High Voltage Check

CAUTION: There is no high voltage adjustment on this chassis. The B+ power supply must be set to +130 volts (Full color bar input and normal picture level).

1. Connect a digital voltmeter to the second

anode of the picture tube.

2. Turn on the TV. Set the Brightness and

Contrast controls to minimum (zero beam current).

3. The high voltage should not exceed 33KV.

4. Adjust the Brightness and contrast controls to

both extremes. Ensure that the high voltage does not exceed 33KV under any conditions.

4-3-4 FOCUS Adjustment

1. Input a black and white signal.

2. Adjust the tuning control for the clearest pic-

ture.

3. Adjust the FOCUS control for well defined

scanning lines in the center area of the screen.

4-3-5 Cathode Voltage Adjustment

(Screen Adjustment)

1. Input a Toshiba pattern.

2. Go to service mode and select ‘G2-Adjust.

3. Adjust bottom VR of FBT to display

“SCREEN ADJUST : OK”

4. Use the Menu or Mute key to complete

G2 adjustment.

4-3-6 Purity Adjustment

1. Warm up the receiver for at least 20 minutes.

2. Plug in the CRT deflection yoke and tighten the clamp screw.

3. Plug the convergence yoke into the CRT and set in as shown in Fig. 4-2.

4. Input a black and white signal.

5. Fully demagnetize the receiver by applying an external degaussing coil.

6. Turn the CONTRAST and BRIGHTNESS controls to maximum.

7. Loosen the clamp screw holding the yoke. Slide the yoke backward or forward to provide vertical green belt. (Fig. 4-3).

8. Tighten the convergence yoke.

9. Slowly move the deflection yoke forward, and adjust for the best overall green screen.

10. Temporarily tighten the deflection yoke.

11. Produce blue and red rasters by adjusting the low-light controls. Check for good purity in each field.

12. Tighten the deflection yoke.

Samsung Electronics

Troubleshooting

5-1

5. Troubleshooting

5-1 No Power

Counect

the Power code

Power LED

LED Off

Check the

12.5V-A Line

Abnormal

Check the

FD802S, IC801S

or AC-Fuse

Check

the

LED On

Normal

Check/Replace

IC802

Abnormal

Check the

3.3V-A,8V-A Line of IC201S

Normal

Check the

X-tal,SDA,SCL port

of IC201S

Normal

Check the

(33)Pin (H-Drive)

of IC201S

Normal

Check the

130V- A Line

Normal

Abnormal

Replace IC201 S

Abnormal

Check the FBT,D808

Check / Replace

Q401

5-2 Samsung Electronics

5-2 No Video (Sound OK)

Troubleshooting

Check RK,GK,BK

Signal

Nornal

Check the

Voltage of heater

Nornal

Check

CRT and FBT

Abnormal

Check/Replace

R418,R522,R523

Abnormal

Check/Replace

IC201S

Abnormal

Check R,G,B

Signal into CRT

PCB

Abnormal

Check IC201S

Pin 51,52,53

(R.G.B)

Nornal

Check IC201S

Pin50(IK,V-GUARD)

Nornal

Check IC501

B+(180V-B)

Abnormal

Check the

resistance of R519

Nornal

Check/Replace

D407,FBT

Nornal

Check IC301

+

B Volt

-

Abnormal

Replace

Nornal

IC301 Check/Replace

D406,R414,D405,R413

Check/Replace

R519

Nornal

Check

CRT and FBT