Sony GV-D200 Service Manual page 71

4. RGB AMP Adjustment (PD-130 board)
Set the D range of the RGB decoder used to drive the LCD to the
specified value. If deviated, the LCD screen will become blackish
or saturated (whitish).
Mode VTR stop
Signal No signal
Measurement Point Pin 3 of CN5502 (VG)
External trigger: Pin 4 of CN5502
(PANEL COM)
Measuring Instrument Oscilloscope
Adjustment Page D
Adjustment Address A5
Specified Value A = 3.59 ± 0.05V
Note: Press the DISPLAY button and erase the screen indicators.
Adjusting method:
Order Page Address Data
1 0 01 01
2 D A5
3 D A5
4 0 01 00
2H
Pedestal
Fig. 5-3-20.
Procedure
Set the data.
Change the data and set the
voltage (A) between the reversed
waveform pedestal and non-
reversed waveform pedestal to
the specified value.
(The data should be "00" to
"3F".)
Press PAUSE button.
Set the data.
Pedestal
A
5. Contrast Adjustment (PD-130 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
0 IRE
5-36
VTR stop
No signal
Pin 3 of CN5502 (VG)
External trigger: Pin 4 of CN5502
(PANEL COM)
Oscilloscope
D
AA
A = 3.34 ± 0.07V
Procedure
01 Set the data.
Change the data and set the
voltage (A) between the 100 IRE
and 0 IRE (pedestal) to the
specified value.
(The data should be "00" to
"7F".)
Press PAUSE button.
00 Set the data.
100 IRE
2H
Fig. 5-3-21.
A