Contrast Adjustment (Vf-124 Board); Backlight Consumption Current Adjustment (Vf-124 Board) - Sony DCR-TRV5 Service Manual

4. Contrast Adjustment (VF-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
Pin @º of CN005 (EVF VG) on
Measurement Point
VC-207 board
Measuring Instrument Oscilloscope
Adjustment Page D
Adjustment Address 73
Specified Value A = 1.45 ± 0.1V (NTSC)
A = 1.35 ± 0.1V (PAL)
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 2, address: 11, set data: 04, and press the PAUSE
button of the adjustment remote commander.
3) Input the following data to page: D, address: 88 to 8D.
Note: Press the PAUSE button of the adjustment remote commander
each time to set the data.
Address 88 89
Data
00 27
4) Select page: D, address: 73, change the data and set the voltage
(A) between the white (30%) and pedestal to the specified value.
5) Press the PAUSE button of the adjustment remote commander.
6) Input the following data to page: D, address: 88 to 8D.
Note: Press the PAUSE button of the adjustment remote commander
each time to set the data.
Address 88 89
Data 38 00
7) Select page: 2, address: 11, set data: 00, and press the PAUSE
button of the adjustment remote commander.
8) Select page: 0, address: 01, and set data: 00.
2H
White (30%)
Pedestal
Fig. 5-1-14
8A 8B 8C 8D
00 00 00 00
8A 8B 8C 8D
02(NTSC)
20 20 00
00(PAL)
A
5. Backlight Consumption Current Adjustment
(VF-124 board)
Set the backlight luminance and color temperature.
If deviated, the image may become dark or bright.
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Note: Adjust 30 seconds after running on the power supply. Adjusting
method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: D, address: 77, change the data and set the voltage
difference (A) between Pin !¢ of CN005 (EVF BL 4.75V) and
Pin !§ of CN005 (EVF BL 4.75V(–)) to the specified value.
3) Press the PAUSE button of the adjustment remote commander.
4) Select page: 0, address: 01, and set data: 00.
5-19
VTR stop
No signal
+ Probe: Pin !¢ of CN005
(EVF BL 4.75V) on VC-207 board
– Probe: Pin !§ of CN005
(EVF BL 4.75V(–)) on VC-207 board
Digital voltmeter
D
77
A = 21.0 ± 1.0mVdc