Sony DCR-TRV240 Service Manual page 132

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).
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
1 0 01 01
2 3 C4 61
3 3 C5 58
4 C 65
5 C 65
6 3 C4 00
7 3 C5 00
8 0 01 00
9
A
V
Fig. 5-1-19.
Procedure
Set the data.
Set the data.
Set the the data.
Change the data and set the PSIG
signal amplitude (A) to the
specified value.
(The data should be "00" to "0F".)
Press PAUSE button.
Set the data.
Set the data.
Set the data.
Check that the specified value of
"RGB AMP Adjustment" is
satisfied.
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).
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Note: The data of page: 0, address: 10 must be "00".
Adjusting method:
Order Page Address Data
1 0 01
2 C 69
3 C 69
4 0 01
A
Pedestal
5-31
DCR-TRV240/TRV340
VTR stop
No signal
Pin 3 of CN5502 (VG)
Ext. trigger: Pin 4 of CN5502 (PSIG)
Oscilloscope
C
69
A = 2.72 ± 0.05V
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. 5-1-20.