24232103 datasheet(11/50 Pages) TOSHIBA

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ITEM

ADJUSTMENT PROCEDURE

Vertical retrace line

SUB-BRIGHTNESS

(BRTC)

1. Constrict the picture height until the

vertical retrace line appears adjusting

the HEIGHT control on the MAIN board.

2. Adjust the CONTRAST to the minimum

and BRIGHTNESS to the center.

3. Enter the service mode, then select

“BRTC” register.

4. Adjust the data value so the belt of

vertical retrace line just disappear.

5. Adjust the HEIGHT control.

* Adjust the SUB-BRIGHTENESS after

adjusting the WHITE BALANCE.

SUB-COLOR

(SCOL)

SUB-TINT

(TNTC)

1. Receive color-bar signal from color-bar generator.

2. Adjust the BRIGHTNESS and CONTRAST to the center (RESET status).

3. Connect oscilloscope to TP501on the MAIN board.

4. Enter the service mode, then select “SCOL”.

5. Temporarily adjust the data value to

achieve about 1V0-p of blue bar.

6. Select “TNTC” register.

7. Adjust the data value to obtain the blue

bar to magenta bar ratio of 3:2 as

shown.

8. Select “SCOL” register.

9. Adjust the data value to achieve 1.8V

0-p

of blue bar on scope.

10. Check the picture with off-air signal.

Blue

Magenta

3 (1.8V0-P)

SUB-CONTRAST

(SCNT)

1. Tune in a color program and adjust the BRIGHTNESS and CONTRAST to

normal mode(RESET).

2. Enter the service mode, then select "SCNT" register.

3. Change "SCNT" data to13H.

4. Check the picture contrast.

ELECTRICAL ADJUSTMENT

PICTURE POSITION

1. Receive the pattern signal which shows it's center

on the screen.

2. Adjust the picture position alternately by turning

CENTERING MAGNETS for proper picture position.

3. Check the picture with off-air signal.

VERTICAL POSITION (VCEN)

1. Call up the adjustment mode display, then select item VCEN.

2. Press the VOLUME s or t button to get the voltage +30 ±10 mV.

3. Measuring method of voltage as follows.

TP-V

TP-G

(on SIGNAL board)

DIGITAL

VOLT METER

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