Bright Adjustment (Vf-121 Board); Contrast Adjustment (Vf-121 Board) - Sony DCR-TRV890E Service Manual

2. Bright Adjustment (VF-121 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
Pin 4 of CN2904 (EVF VG) on
Measurement Point
VI-151 board
Measuring Instrument Oscilloscope
Adjustment Page D
Adjustment Address 7A
Specified Value A = 7.25 ± 0.05V
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 3, address: 0C, set data: 20, and press the PAUSE
button of the adjustment remote commander.
3) Select page: 3, address: 22, set data: 02, and press the PAUSE
button of the adjustment remote commander.
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.
(The data of address: 7A should be "54" to "D7".)
5) Press the PAUSE button of the adjustment remote commander.
6) Select page: 3, address: 22, set data: 00, and press the PAUSE
button of the adjustment remote commander.
7) Select page: 3, address: 0C, set data: 00, and press the PAUSE
button of the adjustment remote commander.
8) Select page: 0, address: 01, and set data: 00.
2H
Pedestal
Fig. 5-1-18
Pedestal
A

3. Contrast Adjustment (VF-121 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: 20, and press the PAUSE
button of the adjustment remote commander.
3) Select page: 3, address: 22, set data: 02, and press the PAUSE
button of the adjustment remote commander.
4) Select page: D, address: 7B, change the data and set the voltage
(A) between the 100 IRE and 0 IRE (pedestal) to the specified
value.
5) Press the PAUSE button of the adjustment remote commander.
6) Select page: 3, address: 22, set data: 00, and press the PAUSE
button of the adjustment remote commander.
7) Select page: 3, address: 0C, set data: 00, and press the PAUSE
button of the adjustment remote commander.
8) Select page: 0, address: 01, and set data: 00.
100 IRE
A
0 IRE (Pedestal)
5-23
Camera
Arbitrary
Pin 4 of CN2904 (EVF VG) on
VI-151 board
Oscilloscope
D
7B
A = 1.81 ± 0.05V
2H
Fig. 5-1-19