Vco Adjustment (Vf-119 Board); Bright Adjustment (Vf-119 Board) - Sony Handycam CCD-TR57 Service Manual

2. VCO Adjustment (VF-119 board)

Set the VCO free-run frequency. If deviated, the EVF screen will be
blurred.
Mode VTR stop
Signal No signal
Pin !∞ of CN910 (VCO) on VC-195
Measurement point
board
Measuring instrument Oscilloscope (DC range)
Adjustment page E
Adjustment address C2
A = 1.8 ± 0.1Vdc
Specified value
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 3, address: 01, set data: 55, and press the PAUSE
button of the adjusting remote commander.
3) Check the GND level of the oscilloscope.
5) Select page: E, address: C2, change the data and set the VCO
output voltage (A) to the specified value.
4) Press the PAUSE button of the adjusting remote commander.
5) Select page: 3, address: 01, set data: 00, and press the PAUSE
button of the adjusting remote commander.
6) Select page: 0, address: 01, and set data: 00.
H
A
Fig. 5-1-12.

3. Bright Adjustment (VF-119 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: 3, address: 01, set data: 55, and press the PAUSE
button of the adjusting remote commander.
3) Select page: E, address: C3, change the data and set the voltage
(A) between the reversed waveform pedestal and non-reversed
waveform pedestal to the specified value.
4) Press the PAUSE button of the adjusting remote commander.
5) Select page: 3, address: 01, set data: 00, and press the PAUSE
button of the adjusting remote commander.
6) Select page: 0, address: 01, and set data: 00.
GND level
(0 Vdc)
5-24
VTR stop
No signal
Pin !§ of CN910 (EVF VG) on VC-195
board
Oscilloscope
E
C3
A = 7.2 ± 0.1 V
A
2H
Fig. 5-1-13.