Toshiba DW65X91 Service Manual page 16

ITEM
SUB-BRIGHTNESS
(BRTC)
SUB-COLOR
(SCOL)
SUB-TINT
(TNTC)
PICTURE POSITION
HEIGHT
WIDTH
VERT. LINEARITY
(Service mode data)
ADJUSTMENT PROCEDURE
1. Constrict the picture height until the verti-
cal retrace line appears adjusting the
HEIGHT control on the MAIN board.
2. Adjust the CONTRAST to the minimum.
3. Enter the service mode, then select
"BRTC" register.
4. Adjust the data value so the belt of verti-
cal retrace line just disappear.
5. Adjust the CONTRAST for the desired
contrast.
6. Adjust the HEIGHT control.
1. Receive color-bar signal from color-bar generator.
2. Adjust the BRIGHTNESS and CONTRAST to the center (RESET status).
3. Connect oscilloscope to TP50 on the MAIN board.
4. Enter the service mode, then select "SCOL".
5. Temporarily adjust the data value to achieve about 1V
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
of blue bar on scope.
10. Check the picture with off-air signal.
Adjust the Service mode data: Refer to table-2 on page 26.
– 16 –
Vertical retrace line
of blue bar.
0-p
Blue
Magenta
0-p
0
3 (1.8V )
0-P
2