Sony CCD TRV16 Service Manual - Page 105

VCO Adjustment VF-119 board, Bright Adjustment VF-119 board

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2. VCO Adjustment (VF-119 board) Set the VCO free-run frequency. If deviated, the EVF screen will be blurred. Mode Signal Measurement point Measuring instrument Adjustment page Adjustment address Specified value VTR stop No signal Pin !∞ of CN910 (VCO) on VC-215 board Oscilloscope (DC range) E C2 A = 1.8 ± 0.1Vdc 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 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 VTR stop No signal Pin !§ of CN910 (EVF VG) on VC-215 board Oscilloscope E C3 A = 7.2 ± 0.1 V 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. A Fig. 5-1-13. GND level (0 Vdc) A 2H Fig. 5-1-14.

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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
Measurement point
Pin
!∞
of CN910 (VCO) on VC-215
board
Measuring instrument
Oscilloscope (DC range)
Adjustment page
E
Adjustment address
C2
Specified value
A = 1.8 ± 0.1Vdc
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.
3. Bright Adjustment (VF-119 board)
Set the level of the VIDEO signal for driving the LCD to the speci-
fied value. If deviated, the screen image will be blackish or satu-
rated (whitish).
Mode
VTR stop
Signal
No signal
Measurement point
Pin
!§
of CN910 (EVF VG) on VC-215
board
Measuring instrument
Oscilloscope
Adjustment page
E
Adjustment address
C3
Specified value
A = 7.2 ± 0.1 V
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.
Fig. 5-1-13.
Fig. 5-1-14.
H
A
GND level
(0 Vdc)
A
2H