Psig Gray Adjustment (Pd-217 Board); Contrast Adjustment (Pd-217 Board) - Sony DSR-PD170 Service Manual

DSR-PD170/PD170P/PD190P

4. PSIG GRAY Adjustment (PD-217 Board)

Set the PSIG signal level to an appropriate level.
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Adjusting method:
Order Page Address Data
1 0 01
2 D A7
3 D A7
4 0 01
VTR stop
No signal
Pin 4 of CN2105 (PSIG)
Oscilloscope
D
A7
A = 5.00 ± 0.05V
Procedure
01 Set the data.
Change the data and set the PSIG
signal level (A) to the specified
value.
Press PAUSE button.
00 Set the data.
2H
Fig. 6-1-24.

5. Contrast Adjustment (PD-217 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
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Adjusting method:
Order Page Address Data
1 0 01
2 D AA
3 D AA
4 0 01
5
A
3 steps peak
A
Pedestal
6-36
VTR stop
No signal
Pin 1 of CN2105 (VG)
Oscilloscope
D
AA
A = 2.70 ± 0.05V
Procedure
01 Set the data.
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".)
Press PAUSE button.
00 Set the data.
Check that the specified value of
"Bright Adjustment" is satisfied.
2H
Fig. 6-1-25.