Read Sony DCR-PC4E / DCR-PC5 / DCR-PC5E (serv.man2) Service Manual online
5-33
4. Contrast Adjustment (PD-126 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).
value. If deviated, the screen image will be blackish or saturated
(whitish).
Mode
VTR stop
Signal
No signal
Measurement Point
Pin 1 of CN2105 (VG)
Measuring Instrument
Oscilloscope
Adjustment Page
D
Adjustment Address
AA
Specified Value
A = 2.95 ± 0.05V
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
D
AA
Change the data and set the
voltage (A) between the 3 steps
peak and pedestal to the
specified value.
(The data should be “00” to
“7F”.)
voltage (A) between the 3 steps
peak and pedestal to the
specified value.
(The data should be “00” to
“7F”.)
3
D
AA
Press PAUSE button.
4
0
01
00
Set the data.
5
Check that the specified value of
“Bright Adjustment” is satisfied.
“Bright Adjustment” is satisfied.
5. Center Level Adjustment (PD-126 board)
Set the video signal center level of LCD panel to an appropriate
level.
level.
Mode
VTR stop
Signal
No signal
Measurement Point
Pin 1 of CN2105 (VG)
Measuring Instrument
Digital voltmeter
Adjustment Page
D
Adjustment Address
AB
Specified Value
A = 7.00 ± 0.05Vdc
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
3
0C
60
Set the data, and press PAUSE
button.
button.
3
3
22
08
Set the data, and press PAUSE
button.
button.
4
D
AB
Change the data and set the DC
voltage (A) to the specified
value.
(The data should be “00” to
“7F”.)
voltage (A) to the specified
value.
(The data should be “00” to
“7F”.)
5
D
AB
Press PAUSE button.
6
3
0C
00
Set the data, and press PAUSE
button.
button.
7
3
22
00
Set the data, and press PAUSE
button.
button.
8
0
01
00
Set the data.
3 steps peak
Pedestal
A
2H
Fig. 5-1-20.
