Bright Adjustment (Vf-138 Board); Contrast Adjustment (Vf-138 Board) - Sony DCR-PC100 Service Manual

2. Bright Adjustment (VF-138 board)

Set the level of the VIDEO signal for driving the LCD to the specified
value. If deviated, the screen image will be blackish or saturated
(whitish).
Mode Camera
Subject Arbitrary
Measurement Point Pin 4 of CN2903 (EVF VG) of
VC-227 board
Measuring Instrument Oscilloscope
Adjustment Page D
Adjustment Address 7A
Specified Value A = 7.34 ± 0.05V
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 3, address: 0C, set data: 60, and press the PAUSE
button.
3) Select page: 3, address: 22, set data: 02, and press the PAUSE
button.
4) Select page: D, address: 7A, change the data and set the voltage
(A) between the reversed waveform pedestal and non-reversed
waveform pedestal to the specified value.
5) Press the PAUSE button.
6) Select page: 3, address: 22, set data: 00, and press the PAUSE
button.
7) Select page: 3, address: 0C, set data: 00, and press the PAUSE
button.
8) Select page: 0, address: 01, and set data: 00.
2H
Pedestal
Fig. 5-1-15
Pedestal
A

3. Contrast Adjustment (VF-138 board)

Set the level of the VIDEO signal for driving the LCD to the specified
value. If deviated, the screen image will be blackish or saturated
(whitish).
Mode
Subject
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 3, address: 0C, set data: 60, and press the PAUSE
button of the adjustment remote commander.
3) Select page: 3, address: 22, set data: 02, and press the PAUSE
button.
4) Select page: D, address: 7B, change the data and set the voltage
(A) between the 3-step peak and pedestal to the specified value.
5) Press the PAUSE button.
6) Select page: 3, address: 22, set data: 00, and press the PAUSE
button.
7) Select page: 3, address: 0C, set data: 00, and press the PAUSE
button.
8) Select page: 0, address: 01, and set data: 00.
3 step peak
A
Pedestal
5-31
Camera
Arbitrary
Pin 4 of CN2903 (EVF VG) of
VC-227 board
Oscilloscope
D
7B
A = 1.95 ± 0.05V
2H
Fig. 5-1-16