Contrast Adjustment (Pd-124 Board); Center Level Adjustment (Pd-124 Board) - Sony DCR-TRV6 Service Manual

4. Contrast Adjustment (PD-124 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 7 of CN009 (PANEL VG) of
VC-240/241 board
Ext. trigger: Pin qa of CN009
(PANEL COM)
Measuring Instrument Oscilloscope
Adjustment Page D
Adjustment Address AA
Specified Value A = 2.80 ± 0.05V (TRV6E/TRV20E)
A = 2.60 ± 0.05V (TRV6)
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: D, address: AA, change the data and set the voltage
(A) between the pedestal (0 IRE) and 100 IRE to the specified
value.
(The data of address: AA should be "00" to "7F".)
Note: The contrast adjustment mode is set up automatically, so the 3
steps signal is displayed on the LCD screen.
3) Press the PAUSE button of the adjustment remote commander.
4) Select page: 0, address: 01, and set data: 00.
100IRE
A
Pedestal
Fig. 5-1-24.
2H

5. Center Level Adjustment (PD-124 board)

Set the video signal center level of LCD panel to an appropriate
level.
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Note: 3.5" LCD: DCR-TRV20E
2.5" LCD: DCR-TRV6/TRV6E
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 3, address: 0C, set data: 20, and press the PAUSE
button of the adjustment remote commander.
3) Select page: 3, address: 22, set data: 08, and press the PAUSE
button.
4) Select page: D, address: AB, change the data and set the DC
voltage (A) of VG signal to the specified value.
5) Press the PAUSE button.
6) Select page: 3, address: 22, set data: 00, and press the PAUSE
button.
7) Select page: 3, address: 0C, set data: 00, and press the PAUSE
button.
8) Select page: 0, address: 01, and set data: 00.
5-41
VTR stop
No signal
Pin 7 of CN009 (PANEL VG) of
VC-240/241 board
Digital voltmeter
D
AB
A = 5.25 ± 0.03V (3.5" LCD)
A = 6.75 ± 0.03V (2.5" LCD)