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5-33
Fig. 5-1-20.
0 IRE
100 IRE
A
2H
A
V
Fig. 5-1-19.
5. Black Limit Adjustment (PD-139 board)
(DCR-TRV725E/TRV730E/TRV828/TRV828E/ TRV830/
TRV830E)
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
D
Adjustment Address
A6
Specified Value
A = 8.10 ± 0.08V
Note:
NTSC model: DCR-TRV828/TRV830
PAL model: DCR-TRV725E/TRV730E/TRV828E/TRV830E
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
2
0E
61
Set the data.
3
2
0F
Set the following data.
5B (NTSC), 53 (PAL)
4
D
A6
Change the data and set the PSIG
signal amplitude (A) to the specified
value.
(The data should be “00” to “0F”.)
5
D
A6
Press PAUSE button.
6
2
0E
00
Set the data.
7
2
0F
00
Set the data.
8
0
01
00
Set the data.
9
Check that the specified value of
“RGB AMP Adjustment” is satisfied.
6. Contrast Adjustment (PD-138 board)
(DCR-TRV730)
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
2.5 LCD TYPE SH (61k)
A = 3.50 ± 0.07V
Note:
Refer to “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
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.