CCD-TRV107, CCD-TRV108, CCD-TRV308, CCD-TRV408, CCD-TRV608 - Sony Movie Service Manual (repair manual). Page 123

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5-26
CCD-TRV107/TRV108/TRV308/TRV408/TRV608

4. Contrast Adjustment (PD-156 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
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
7
Adjustment Address
4B
Specified Value
2.5 LCD: A = 3.52 ± 0.07V
3.0 LCD: A = 3.32 ± 0.07V

Note: 2.5 LCD model : CCD-TRV107/TRV108/TRV308/TRV408
3.0 LCD model : CCD-TRV608
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
7
4B
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
7
4B
Press PAUSE button.
4
0
01
00
Set the data.

5. COM AMP Adjustment (PD-156 board)
Set the common electrode drive signal level of LCD to the specified
value.
Mode
VTR stop
Signal
No signal
Measurement Point
Pin 4 of CN5502 (PANEL COM)
Measuring Instrument
Oscilloscope
Adjustment Page
7
Adjustment Address
48
Specified Value
2.5 LCD: A = 6.30 ± 0.05V
3.0 LCD: A = 6.05 ± 0.05V

Note: 2.5 LCD model : CCD-TRV107/TRV108/TRV308/TRV408
3.0 LCD model : CCD-TRV608
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
7
48
Change the data and set the
PANEL COM signal level (A) to
the specified value.
3
7
48
Press PAUSE button.
4
0
01
00
Set the data.
Fig. 5-1-17.
100 IRE
Pedestal
A
2H
Fig. 5-1-18.
A
2H

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