Brightness And Contrast Adjustment - Sony UP-895 Service Manual

3-3. Brightness and Contrast Adjustment

Machine condition for adjustment
. Input signal: 10 steps signal
. In case, monitor is not connected, set DIP
switch != on the rear panel to ON, if
connected, set to OFF.
. Set CONTRAST and BRIGHT knobs to
the center position on the front panel.
3-2
Specification
TP6 (AD IN)/MA-99 (B-3) Output waveform
TP7 (VRT)/MA-99 (B-3) Output voltage
TP8 (VRB)/MA-99 (B-3) Output voltage
9
8
7
6
5
4
3
2
1
0
RV6 2
1
0
Adjust RV6 so that mid voltage between 0 and
1 is equaled to the VRB voltage.
RV5 10
9
8
Adjust RV5 so that mid voltage between 9 and
10 is equaled to the VRT voltage.
C ADJ adjustment
1RV5/MA-99 (C-1)
B ADJ adjustment
1RV6/MA-99 (C-1)
10
VRT
(TP7)
MA-99
AD IN
(TP6)
VRB
(TP8)
VRB
VRT
Adjustments
1RV5
1RV6
TP7
TP8
TP6
UP-895/(E)