Read Sony DCR-TRV238E / DCR-TRV239E (serv.man4) Service Manual online
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DCR-TRV238E/TRV239E
4. Black Limit Adjustment (PD-160 board)
Set the dynamic range of the LCD driver to an appropriate level. If
deviated, the LCD screen will become blackish or saturated
(whitish).
Set the dynamic range of the LCD driver to an appropriate level. If
deviated, the LCD screen will become blackish or saturated
(whitish).
Mode
VTR stop
Signal
No signal
Measurement Point
Pin 4 of CN5502 (PSIG)
Measuring Instrument
Oscilloscope
Adjustment Page
C
Adjustment Address
65
Specified Value
A = 8.30 ± 0.08V
Note:
The data of page: 0, address: 10 must be “00”.
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
3
C4
61
Set the data.
3
3
C5
50
Set the the data.
4
C
65
Change the data and set the
PSIG signal amplitude (A) to the
specified value.
(The data should be “00” to “0F”.)
PSIG signal amplitude (A) to the
specified value.
(The data should be “00” to “0F”.)
5
C
65
Press PAUSE button.
6
3
C4
00
Set the data.
7
3
C5
00
Set the data.
8
0
01
00
Set the data.
9
Check that the specified value of
“RGB AMP Adjustment” is
satisfied.
“RGB AMP Adjustment” is
satisfied.
Fig. 5-1-19.
5. Contrast Adjustment (PD-160 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).
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)
Ext. trigger: Pin 4 of CN5502 (PSIG)
Ext. trigger: Pin 4 of CN5502 (PSIG)
Measuring Instrument
Oscilloscope
Adjustment Page
C
Adjustment Address
69
Specified Value
A = 2.40 ± 0.05V
Note:
The data of page: 0, address: 10 must be “00”.
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
C
69
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”.)
(A) between the 100 IRE and 0 IRE
(pedestal) to the specified value.
(The data should be “00” to “7F”.)
3
C
69
Press PAUSE button.
4
0
01
00
Set the data.
Fig. 5-1-20.
(Page 5-32)
A
V
100 IRE
Pedestal
A
2H
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