Sony DCR-PC7 Service Manual page 65

6. Contrast Adjustment (PD-71 board)
Set the level of the VIDEO signal for driving the LCD to the specified
value. If deviated, the screen image will not be consistent or will be
blackish or saturated (whitish).
Mode VTR playback
Audio operation check tape,
Signal
color bar portion
Pin 0 of CN5801 (VG) (CL5804)
Measurement Point
Measuring Instrument
Oscilloscope
Adjustment Page
D
Adjustment Address
CB
A = 3.40 ± 0.05V (NTSC)
Specified Value
A = 4.00 ± 0.10V (PAL)
1) Set data: 01 to page: 1, address: 00.
2) Input the following data to page: D, addresses: F2 and F3.
Address
F2 F3
Data 00 C0
Note: Press the PAUSE button of the adjusting remote
commander each time to set the data.
3) Change the data of page: D, address: CB, and set the voltage (A)
between the pedestal and white 100% to the specified value.
Note: When select address: CB, select address: C8 first, and then
select address: CB.
4) Press the PAUSE button of the adjusting remote commander.
5) Input the following data to page: D, addresses: F2 and F3.
F2
Address
30
Data
Note: Press the PAUSE button of the adjusting remote
commander each time to set the data.
6) Set data: 00 to page: 1, address: 00.
7) Check that the specified value of "Bright Adjustment" is satisfied,
if not, perform "Bright Adjustment".
F3
DE
For NTSC model
White 100%
A
For PAL model
White 100%
A
6-26
2H
2H
Fig. 6-1-18.