Color Adjustment (Pk-45 Board); V-Com Level Adjustment (Pk-45 Board) - Sony MVC-FD91 Service Manual

6. Color Adjustment (PK-45 board)

Set the color saturation to the standard value. If deviated, the color
will be to dark or light.
Mode Playback
Signal Alignment disk (TFD2-1(+) or TFD2-
2(–)):
Color bar signal (MVC-001C.JPG)
Pin 9 of CN701 (VG)
Measurement Point
External trigger: Pin 8 of CN701
(COM)
Measuring Instrument Oscilloscope
Adjustment Page F
Adjustment Address 31
Specified Value A = 0.00 ± 0.05V
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 3, address: 02, and set data: 01.
3) Select page: F, address: 31, change the data and set the voltage
(A) between the white and green to the specified value.
4) Press the PAUSE button of the adjustment remote commander.
5) Select page: 3, address: 02, and set data: 00.
6) Select page: 0, address: 01, and set data: 00.
White
Green
A
Fig. 5-1-23.
2H

7. V-COM Level Adjustment (PK-45 board)

Set the common electrode drive signal level of LCD to the specified
value.
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: 02, and set data: 01.
3) Select page: F, address: 38, 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: 02, and set data: 00.
6) Select page: 0, address: 01, and set data: 00.
5-27
Playback
No signal
Pin 8 of CN701 (COM)
Oscilloscope
F
38
A = 6.25 ± 0.05V
2H
Fig. 5-1-24.
A