GV-D200 - Sony VCR Service Manual (repair manual). Page 126

5-36

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

Press the DISPLAY button and erase the screen indicators.

1

0

01

01

Set the data.

2

D

A5

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”.)

3

D

A5

Press PAUSE button.

4

0

01

00

Set the data.

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

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

AA

Specified Value

A = 3.34 ± 0.07V

1

0

01

01

Set the data.

2

D

AA

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”.)

3

D

AA

Press PAUSE button.

4

0

01

00

Set the data.

Fig. 5-3-20.

Fig. 5-3-21.

Pedestal

A

2H

Pedestal 

0 IRE

100 IRE

A

2H