Samsung CW25M064NRXXEC User Manual

COLOR TELEVISION RECEIVER

Chassis : KS7A(P) REV.1
Model : CW25M064NRXXEC

COLOR TELEVISION RECEIVER CONTENTS

Specifications

Alignment and Adjustments

Exploded Views and Parts List

Electrical Parts List

PCB Diagram

Schematic Diagrams

1.

2.

3.

4.

5.

6.

SERVICE

Manual

Specifications

Samsung Electronics 1-1

1. Specifications

Country INDEX

Origin Mark Made inLocal Country(Factory) or Made By Sam sung

Color

demodulation

Sound
receving way

Sound

F

demodulation

I

Ant enna 75ohmDin -Jack(V/U)

X

Channel search Program mable F/S

E

Chnnel numbers 100 CH PROGRAM MEMORY

D

Input volta g e

Po wer Input

f

requency

Power STR Free Volt(X6757), Single Volt (X6750)

Power insulation SMPS /CO LD

PAL/SECAM/NTSC4.43/NTSC3.58(NTSC3.58isoption),(SECAM-L’,L is option)

Quas i - s p lit (Related toVCTI)

Virtual Dolby/Nicam/S t e r eo/L i ne S t er e o

Eas t - As ia, Middle- East Asi a, Africa( 100V ~ 260V) ,
Cis(160V ~ 300V), Europe(230V), 240V

50/60Hz

U

Receiving(P/G) CH VHF: 2 ~ 13, UHF: 14 ~ 69, CATV:S1~S41

n

BRAND / BUYER SAMSUNG/Depend on t he Buyer

f

Safety De pend on t he country

i
x

Power c ord/

e
d

Polarity

Charac ter

CP2/No( 4. 0), AP2/ Yes, EP2/No

*2T-PIP/1T- PIP/ NoPIP
*ANT di spl a y( Option)
*DNIe Jr(Option)
*FMRadio(O ption)

Alignment and Adjustments

Samsung Electronics 2-1

2. Alignment and Adjustments

2-1 General Alignment Instructions

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 and focus.

2. Observe the picture for good black and white
details. There should be objectionable color
shading; if color shading is present,
demagnetize, perform 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.

2-2 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 is moved or turned in a different direction,
the power should be OFF for at least 10
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 turning
power OFF.

If color shading persists, perform the
following Color purity and Convergence
adjustments.

2-3 High Voltage Check

CAUTION : There is no high voltage adjustment
on this chassis. The B+ power supply should be
+135 volts (with 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. Adjust the Brightness and contrast controls to
both extremes. Ensure that the high voltage
does not exceed 30 KV under any conditions.

Alignment and Adjustments

2-2 Samsung Electronics

2-4 FOCUS Adjustment

1. Iput a crosshatch pattern.

2. Adjust the tuning control for the clearest picture.

3. Adjust the FOCUS control for well defined scanning lines in the center area of the screen.

2-5 SCREEN Adjustment

1. Input Toshiba Pattern
If a Toshiba pattern is not available,
Enter “Service Mode” and
select “Test pattern 2”(Toshiba pattern)

2. Enter “Service Mode”.

3. Select “G2-Adjust”.

4. Set the values as example

5. Turn the SCREEN VR until “Read Cutoff” and “Read Drive” are green.
(The incorrect SCREEN Voltage may result that “Read Cutoff” and “Read Drive” should be red)

ex) IBRM = 175

WDRV = 110
CDL = 250
COLR G B = 110 110 110

2-6 White Balance Adjustment

1. Warm up the TV set for at least 30 minutes.

2. Enter the Service Mode by pressing the remote control keys in the following sequence:

Power Off ➞ Info ➞ Menu ➞ Mute ➞ Power On

3. Initialize all set data.

4. Input a Toshiba pattern.

5. Using a probe(CA100), do the White Balance adjustments.
(1) Adjust Low-Light.

- Adjust Sub Brightness to set Y.

- Adjust B Cutoff to set y.

- Adjust R Cutoff to set x.

(2) Adjust High-Light.

- Adjust Sub Contrast to set Y.

- Adjust B Drive to set y.

- Adjust R Drive to set x.
(3) Check the value of Low-Light. If necessary, readjust Low-Light.
(4) Check the value of High-Light. If necessary, readjust High-Light.

2-8 Factory Adjustment

1. To enter the “Service Mode”, Press the remote-control keys in this sequence :

- If you do not have Factory remote-control

- If you have Factory remote-control

2-8-1 Service Mode

Alignment and Adjustments

Samsung Electronics 2-3

2-7 When adjusting Screen Voltage and White Balance

1. Screen Voltage and White Balance are related each other. Make sure both adjustments are correct.

2. Adjust Screen Voltage before White Balance Adjustments. Make sure Screen Voltage is correct.

3. If White Balance has been readjusted, re-check Screen Voltage.

4. After adjustments are complete, check the following.

- If spots appear on the screen after pressing the Power On/Off key, readjust Screen Voltage.

- If flyback lines appear on the screen, readjust Screen Voltage.

PICTURE OFF PICTURE ON

PICTURE ON

INFO

()

()

INFO

MENU

MUTE

FACTORY

Alignment and Adjustments

2-4 Samsung Electronics

2-8-2 Factoy Mode OSD

SERVICE / T - ETPAS0 - 10XX

Deflection
Video Adjust1
Video Adjust2
Video Adjust3
Option : D2 16 04 02
YC Delay
Test Pattern : 0
EEPROM
Bus Stop
Check Sum : 0000
Reset / 2004-03-08
G2 Adujust

2-8-2(A) ADJUST

127
127
127
180
127
127
127
127
127
127
127
127
127
127
255
255
127
127
127
127

Item Min

Max

-128

-128

-128
32

-128

-128

-128

-128

-128

-128

-128

-128

-128

-128

0
0

-128

-128

-128

-128

Remark

Adjust
Adjust
Adjust
Adjust
Adjust

FIX(Depend on the inch)

Adjust
Adjust

Adjust
FIX(Depend on the inch)
FIX(Depend on the inch)

Adjust

Adjust

Adjust

FIX

(Depend on the inch&CRT Drive)

FIX(Depend on the inch&CRT Drive)
FIX(Depend on the inch&CRT Drive)
FIX(Depend on the inch&CRT Drive)
FIX(Depend on the inch&CRT Drive)
FIX(Depend on the inch&CRT Drive)

V Amp
V Shift
H EW
H Shift
V Linearity
V SC
H Parabolra
Upper Corner
Lower Corner
Upper Corner 6
Lower Corner 6
H Trapezium
Bow
Angle
EHT Time
EHT Threshold
EHT Vertical
EHT Horizontal
EHT Vertical2
EHT Horizontal2

DEFLECTION : PAL

ET

24

-35
25

124

0
43
62

-5

-5

-4

-4

-3
3
1

20

1

-12
5

-19

10

Alignment and Adjustments

Samsung Electronics 2-5

G/R

12

-59
5

105

0

43
80

-19

-39
0
0
1
3

-2

20

1

-12
5

-19

10

Alignment and Adjustments

2-6 Samsung Electronics

127
127
127
180
127
127
127
127
127
127
127
127
127
127

Item Min

Max

-128

-128

-128
32

-128

-128

-128

-128

-128

-128

-128

-128

-128

-128

Remark

FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX
FIX

V Amp
V Shift
H EW
H Shift
V Linearity
V SC
H Parabolra
Upper Corner
Lower Corner
Upper Corner 6
Lower Corner 6
H Trapezium
Bow
Angle

DEFLECTION : NTSC OFFSET

ET

-2
6
0

14

-3
0
0
0
0
0
0
0
0
0

G/R

-2
6
0

14

-3
0
0
0
0
0
0
0
0
0

Alignment and Adjustments

Samsung Electronics 2-7

Video Adjust 1

255
255
255
255
255
255
100

63
23
63

1
127
255
255

15
10

10
255
127
127

15

Item Min

Max

0
0
0
0
0
0
0
0
0
0
0

-128
0
0
0

-10

-10
0

10
10

0

Remark

Adjust

FIX
Adjust
Adjust

FIX
Adjust
Adjust
Adjust

FIX

(Depend on the country&CRT Drive)

FIX

FIX

FIX(Depend on the inch)

FIX

FIX

FIX(Depend on the inch&CRT Drive)

Inch(Depend on the CRT)
Inch(Depend on the CRT)

FIX

FIX

FIX

FIX

ET

127
127
127
127
127
127

50
55
10
42

1

16
240
255

8

-5

-4

65

-

-

-

R Cutoff
G Cutoff
B Cutoff
R Drive
G Drive
B Drive
Sub Bright
Sub Contrast
Sub Color
Sub Tint
AKB Option
BCL Threshold
BCL Gain
BCL Time
Sub Sharpness
DVD R Cutoff
DVD B Cutoff
BCL BCUT
Pilot Low(NTSC ONLY)
Pilot High(NTSC ONLY)

V-Mute(X100ms,NTSC ONLY

G/R

127
127
127
127
127
127

50
55

2

52

1

22
240
255

13

-5

-4

55

-

-

-

Alignment and Adjustments

2-8 Samsung Electronics

Video Adjust 2

115

20
255
255

15

63

15

15

15

3
3

7
15
15
15

255
255

1

3

Item Min

Max

0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0

Remark

FIX
FIX
FIX
FIX

FIX(Depend the Tuner)
FIX(Depend on the CRT Drive AMP)
FIX(Depend on the CRT Drive AMP)

FIX
FIX
FIX
FIX

FIX
FIX(Depend on the mode)
FIX(Depend on the mode)
FIX(Depend on the mode)
FIX(Depend on the mode)

FIX

FIX

FIX

2

10
159
159

1
6
4
6
7
3
3

7
15
15
15

255
255

1

3

VSU
Melody Volume
HB Start
HB Stop
RF AGC
VM Gain
VM Delay
V_Peaking
BLE Tilt
BLE Gain
BLE Mode
BLE Break
CTI Gain
CTI Coring
LTI Gain
D-EHT Time
DCT Ratio
LTI Enable
VSP Comb

ET

G/R

2

10
159
159

4
0
0
0
6
1
2
1
0
0
0
5

50

0
0