V-Com Level Adjustment (Pd-170 Board); V-Com Adjustment (Pd-170 Board) - Sony DSR-25 Service Manual

DSR-25

6. V-COM Level Adjustment (PD-170 Board)

Mode
Signal
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: 01, and press the PAUSE
button of the adjustment remote commander.
3) Select page: E, address: 86, change the data and set the V-
COM signal level (A) to the specified value.
4) Press the PAUSE button of the adjustment remote commander.
5) Select page: 3, address: 0C, set data: 00, and press the PAUSE
button.
6) Select page: 0, address: 01, and set data: 00.
A
E-E
Arbitray
Pin 3 of CN1504 on VD-032 board
(PANEL_COM)
Oscilloscope
E
86
A = 6.50 ± 0.05 Vp-p
2H
Fig. 5-3-18

7. V-COM Adjustment (PD-170 Board)

Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Note: Perform "Bright Adjustment" and "Contrast Adjustment"
before this adjustment.
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: 0F, and press the PAUSE
button.
4) Select page: 9, address: 0E, and set data: 27.
5) Select page: E, address: 88, change the data so that brightness
of the section A and section B is equal.
6) Press the PAUSE button of the adjustment remote commander.
7) Select page: 9, address: 0E, and set data: 00.
8) Select page: 3, address: 22, set data: 00, and press the PAUSE
button.
9) Select page: 3, address: 0C, set data: 00, and press the PAUSE
button.
10) Select page: 0, address: 01, and set data: 00.
5-64
E-E
Arbitrary
Check on LCD screen
E
88
The brightness difference between
the section-A and section-B is
minimum
A
B
A
B
B A
A
B
Fig. 5-3-19