Sony Mavica MVC-FD85, Service Manual

Page: 84 / 112

5-30
5. Contrast Adjustment (PK-50 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 PLAY
Signal Arbitrary
Measurement Point Pin
9
of CN803 of FC-72 board
(VG)
External trigger: Pin
8
of CN803 of
FC-72 board (COM)
Measuring Instrument Oscilloscope
Adjustment Page D
Adjustment Address D4
Specified Value LCD TYPE SH: A = 3.17 ± 0.07V
LCD TYPE CA: A = 2.35 ± 0.07V
Note:
Refer to “1-5-1. LCD type check” for the discrimination of the LCD
type.
Adjusting method:
1)
Select page: 0, address: 01, and set data: 01.
2) Select page: 5, address: F1, set data: 03.
3) Select page: D, address: D4, change the data and set the voltage
(A) between the pedestal and 10 steps peak to the specified
value.
4) Press the PAUSE button of the adjustment remote commander.
5) Select page: 5, address: F1, set data: 00.
6) Select page: 0, address: 01, and set data: 00.
Fig. 5-1-18.
6. Color Adjustment (PK-50 board)
Set the color saturation to the standard value. If deviated, the color
will be too dark or light.
Mode PLAY
Signal Arbitrary
Measurement Point Pin
9
of CN803 of FC-72 board
(VG)
External trigger: Pin
8
of CN803 of
FC-72 board (COM)
Measuring Instrument Oscilloscope
Adjustment Page D
Adjustment Address D1
Specified Value LCD TYPE SH: A = 540 ± 50mV
LCD TYPE CA: A = 360 ± 50mV
Note: Refer to “1-5-1. LCD type check” for the discrimination of the LCD
type.
Adjusting method:
1)
Select page: 0, address: 01, and set data: 01.
2) Select page: 5, address: F1, set data: 04.
3) Select page: D, address: D1, change the data and set the voltage
(A) between the white 100% (Reference level) and green to
the specified value.
4) Press the PAUSE button of the adjustment remote commander.
5) Select page: 5, address: F1, set data: 00.
6) Select page: 0, address: 01, and set data: 00.
Fig. 5-1-19.
A
2H
10 steps peak
Pedestal
A
2H
White 100 %
Green