Vco Adjustment (Vf-121 Board); Bright Adjustment (Vf-121 Board) - Sony DCR-TRV9 Service Manual

2. VCO Adjustment (VF-121 board)

Set the VCO free-run frequency. If deviated, the EVF screen will be
blurred.
Mode VTR stop
Signal No signal
Pin !• of CN9903 (VCO) on VC-206
Measurement Point
board
Measuring Instrument Oscilloscope (DC range)
Adjustment Page D
Adjustment Address 76
Specified Value A = 1.80 ± 0.05Vdc
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Check the GND level of the oscilloscope.
3) Select page: D, address: 76, change the data and set the VCO
output voltage (A) to the specified value.
4) Press the PAUSE button of the adjustment remote commander.
5) Select page: 0, address: 01, and set data: 00.
H
A
Fig. 5-1-12

3. Bright Adjustment (VF-121 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
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
Address
Data
4) Select page: D, address: 7A, change the data and set the voltage
(A) between the reversed waveform pedestal and non-reversed
waveform 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
GND level
(0Vdc)
Address
Data
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.
5-19
VTR stop
No signal
Pin @º of CN9903 (EVF VG) on
VC-206 board
Oscilloscope
D
7A
A = 7.1 ± 0.1V (NTSC)
A = 7.1 ± 0.1V (PAL)
each time to set the data.
88 89 8A
00 00 00
each time to set the data.
88 89 8A
38 00 20
2H
Fig. 5-1-13
8B 8C 8D
00 00 00
8B 8C 8D
20 00 00
A