CCD-TR818, CCD-TRV58, CCD-TRV98 - Sony Movie Service Manual (repair manual). Page 118

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5-32
Fig. 5-1-24.
Fig. 5-1-25.
100 IRE
Pedestal
A
2H
A
2H
4. Contrast Adjustment (PD-131 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
ED
Specified Value
2.5 LCD TYPE S:
A = 3.55 ± 0.07V
3.0/3.5 LCD TYPE S:
A = 3.35 ± 0.07V
Note:
Refer to “1. LCD Type Check” for the discrimination of the LCD
type.
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
7
ED
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
ED
Press PAUSE button.
4
0
01
00
Set the data.
5. COM AMP Adjustment (PD-131 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
EA
Specified Value
2.5 LCD TYPE S:
A = 6.30 ± 0.05V (NTSC)
A = 6.10 ± 0.05V (PAL)
3.0 LCD TYPE S:
A = 6.00 ± 0.05V (NTSC)
3.5 LCD TYPE S:
A = 5.90 ± 0.05V (NTSC)
A = 6.00 ± 0.05V (PAL)
Note1:
Refer to “1. LCD Type Check” for the discrimination of the LCD
type.
Note2:
NTSC model: CCD-TRV49/TRV58/TRV68/TRV78/TRV88/
TRV98
PAL model: CCD-TRV49E/TRV58E/TRV59E/TRV78E/TRV98E
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
7
EA
Change the data and set the
PANEL COM signal level (A) to
the specified value.
3
7
EA
Press PAUSE button.
4
0
01
00
Set the data.

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