Samsung CI593CN8XXEU Manual de usuario

COLOR TELEVISION RECEIVER

Chassis : KS3A

Model: CI593CN8XXEU CX683CN8XXEC

CW6844N8XXEF CZ6844N8XXEC

CZ6844N8XXEH

COLOR TELEVISION RECEIVER CONTENTS

Precautions

Reference Information

Specifications

Alignment and Adjustments

Troubleshooting

Exploded Views and Parts List

Electrical Parts List

Block Diagrams

Wiring Diagram

Schematic Diagrams

10.

ELECTRONICS

©Samsung Electronics Co., Ltd. MAY. 2000

Printed in Korea

3KS3A-2801

Alignment and Adjustments

Samsung Electronics 4-1

4. Alignment and Adjustments

4-1 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.

4-2 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.

4-3 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 32 KV under any conditions.

Alignment and Adjustments

4-2 Samsung Electronics

4-5 SCREEN Adjustment

1. Input Toshiba Pattern

2. Enter “Service Mode”.(Refer to “Service Mode”)

3. Select “G2-Adjust”.

4. Set the values as below.

IBRM = 245

WDRV = 55

CDL = 255

COL = 200

5. Turn the SCREEN VR until “MRCR G B” and “MRWDG” are green and those value are about 100.

(The incorrect SCREEN Voltage may result that “MRCR G B” and “MRWDG” should be red)

4-4 Dynamic Focus Adjustment

1. A dynamic focus adjustment should be done

after replacing the CRT PCB, FBT or CRT.

2. Input a crosshatch pattern.

3. Enter “ STANDARD “ in video mode.

4. Turn the static focus VR fully clockwise

(maximum).

5. Turn the dynamic focus VR fully

counterclockwise (maximum).

6. Slowly turn the static focus VR

counterclockwise. Adjust until the

vertical line in the middle of the screen

has maximum clarity.

7. Slowly turn the dynamic focus VR (clockwise)

and adjust the 3rd horizontal line for

maximum clarity.

8. Repeat 4-7, if necessary.

STATIC FOCUS VR

DYNAMIC FOCUS VR

SCREEN

Alignment and Adjustments

Samsung Electronics 4-3

4-6 E2PROM (IC902) Replacement

1. When IC902 is replaced, all adjustment data revert to the initial values.

So, all adjustment values when servicing should be readjusted.

2. After IC902 is replaced, connect the AC power supply cord.

3. Turn the power switch ON.

4. In stand-by, warm up the TV for at least 10 seconds.

5. Power on the TV.

4-7 White Balance Adjustment

■ Equipment : Color-Analyzer (CA-100)

■ Input Signal : Pattern signal (Toshiba pattern)

1. Select STANDARD from the menu.

2. Input an 100% White pattern.

3. Enter the “Service Mode”. (Refer to “4-8 Service Mode”)

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

5. Input a Toshiba pattern signal.

6. Enter the “Video Adjust1”.

- Adjust “Sub Contrast” so that Y (luminance) becomes 40 ft ± 3.

- Use “Red Drive” and “ Blue Drive” to adjust High-Light (x : 290, y : 300)

- Adjust “Sub Bright” so that Y (luminance) becomes 1.3ft ± 0.3.

- Use “Red Cutoff” and “Blue Cutoff” to adjust Low-Light (x : 290, y : 300).

7. Adjust CA-100 so that the final adjustment value can be fixed.

8. Use the Channel Up/Down (▲/▼) buttons to move the cursor on the adjustment modes.

9. Use the Volume +/- buttons to change the adjustment value.

Alignment and Adjustments

4-4 Samsung Electronics

4-8 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. After the Service Mode is entered, the initial screen is as shown in the figure below.

3. Use the Channel Up/Down buttons to move the cursor in the adjustment parameters.

Note :

- When CRT, CRT PCB, FBT, E2PROM (sometimes MICOM) is replaced, the adjustment values

should be controlled.

- After the Service adjustment is completed, Do not select “Reset” in the service mode menu.

(After above procedure is done, power is on initially and the “Plug and Play” will be operated.)

PICTURE OFF PICTURE ON

DISPLAY() MENU MUTE

PICTURE ON DISPLAY() FACTORY

4-8-1 Service Mode

*These hexa digits are check sum value which

depends on the MICOM version.

If check sum value is changed, the value of

E2PROM Data newly initialed.

Initial

Value

100

120

124

122

200

120

140

150

140

-7

Alignment and Adjustments

Samsung Electronics 4-5

4-8-2 Deflection (Memory Data)

4-8-2(A) GEOMETRIC ADJUSTMENT VALUE

No.

OSD

V Shift

V Amp

V Slope

V SC

H EW

H Trapizium

H Parabola

H Symmetry

H Corner

H Shift

4:3-Zoom Para

4:3-16:9 Para

Wide-4:3 Para

Wide-Zoom Para

TTX Position

D-TTX Posi

Range

0 ~ 255

-20 ~ 20

Function

Adjust Vertical Picture Position

Adjust Vertical Picture Size

Adjust Vertical Slope Correction

Adjust Vertical S-Correction

Adjust Horizontal Picture Size

Adjust Horizontal Trapeziod

Adjust Horizontal Parabola Wave

Adjust Horizontal Symmetry

Adjust Horizontal Corner

Adjust Horizontal Position

Adjust Horizontal Parabola in Zoom Mode

Adjust Horizontal Parabola in 16:9 Mode

Adjust Horizontal Parabola in 4:3 Mode

Adjust Horizontal Parabola in Zoom Mode

Adjust Horizontal OSD/TTX Position

Remark

Not to be adjusted

4:3 CRT

Wide CRT

Fixed Value

Alignment and Adjustments

4-6 Samsung Electronics

4-8-2(B) SCREEN CHANGE (I2C BUS GEOMETRIC ADJUSTMENT)

H Symmetry

5 H Corner

8H Trapizium

4 H Parabola

10 H Shift

6 V Amp

3 H EW

1 V Shift

V Slope 7V SC

Alignment and Adjustments

Samsung Electronics 4-7

4-8-2(C) VIDEO ADJUST 1

No.

OSD

Red Cufoff

Green Cutoff

Blue Cutoff

Red Drive

Green Drive

Blue Drive

Sub Bright

Sub Contrast

Sub Color

Sub Tint

BCL Threshold

BCL Gain

BCL Time

TTX Contrast

YC Delay

Range

0 ~255

0 ~ 200

0 ~ 13

0 ~ 27

0 ~ 100

0 ~ 255

0 ~ 15

0 ~ 255

0 ~ 8

Function

Adjust Red Cutoff Level

Adjust Green Cutoff Level

Adjust Blue Cutoff Level

Adjust Red Output Gain

Adjust Green Output Gain

Adjust Blue Output Gain

Adjust Brightness Level

Adjust Contrast Level

Adjust Color Level

Adjust Tint

Adjust Beam Control Limit

Refer to Note 1

Adjust OSD/TTX Contrast

Refer to Table 1

Remark

Low Light

High Light

Low Light

High Light

Not to be adjusted

Initial

Value

127

100

Note 1. Beam Control Limit Characteristic

WDRGB

BCL THESHOLD

beam

1.8mA

1.6mA

MIN

IRE

BCL GAIN MAX

Table 1. YC Delay Adjustment Table

Delay

Value

PAL

Def.

SECAM NTSC

Def.

Fixed Value

OSD

B stretch-BTHR

B stretch-BTLT

B stretch-BAM

Coring

NR off Value

Melody Volumn

RGB Bright

RGB Contrast

EHT Time

EHT Compensation

VSU

✐

4-8-2(E) VIDEO 3 ADJUST

No.

OSD

Peak Threshold

Soft Limit Slope B

Hard Limit

Peak Video Ref

Peak Video Gain

ACC-REF(PAL/NTSC)

ACCR(SECAM)

Range

0 ~ 255

0 ~ 15

0 ~ 255

0 ~ 4

0 ~ 5

0 ~ 20

0 ~ 39

Initial

Value

185

160

Function

White Peak Level Threshold

Refer to Picture Below

White Peak Level Threshold Reference

White Peak Level Threshold Gain

Auto Color Control

Remark

Refer to Note

Below

Alignment and Adjustments

4-8 Samsung Electronics

No.

Range

0 ~ 55

0 ~ 15

0 ~ 31

10 ~ 31

0 ~ 10

0 ~ 20

0 ~ 255

0 ~ 15

0 ~ 255

96 ~ 111

Initial

Value

108

Function

Black Stretch Threshold

Black Stretch Tilt Position

Black Stretch Amount

Luma Peaking Filter Coring

Noise Reduction off value

Adjust “Melody” Volumn Level

OSD/TTX RGB Bright

OSD/TTX RGB Contrast

Electronic High Tension Response Time

Electronic High Tension Coefficient

Vertical Set-Up Time

Remark

Coring : The Value of Center Frequency for the active bandwidth.

VSU : Vertical Sync Delay Time for OSD/TTX jutter-free, or OSD bounding.

4-8-2(D) VIDEO 2 ADJUST

Soft Limit Slope B

Output

511

300

200

100

0100 200 300 00 500 600 700 800 900 1023

tilt 1 [0...511] tilt 2 [0...511]

Part 1 Part 2

Slope 1 [0...15]

Slope 2 [0...15]

range=256...511

Hard limiter

“Soft Limit” is that Limitting

the peak white without

feed-back, but “Peak Limit” is

that with feed-back for white

peak level

✐

Note 2. Soft Limit & Hard Limit Characteristics

✐

✐2

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