Read Sony CCD-TRV66E / CCD-TRV77E (serv.man2) Service Manual online
5-36
3-4. VIDEO SYSTEM ADJUSTMENTS
Video system adjustments must be performed in the following order.
[Adjusting Order]
1.
28MHz origin oscillation adjustment
2.
AFC f
0
adjustment
3.
Filter f
0
adjustment
4.
Y OUT level adjustment
5.
C OUT level adjustment
6.
RP filter f
0
adjustment
7.
REC Y current adjustment
8.
REC L level adjustment
9.
REC C current adjustment
1. 28 MHz Origin Oscillation Adjustment (VC-214 board)
Set the frequency of the clock for synchronization.
If deviated, the synchronization will be disrupted and the color will
become inconsistent.
If deviated, the synchronization will be disrupted and the color will
become inconsistent.
Mode
VTR stop
Signal
No signal
Measurement Point
Pin #™ of IC301 or pin !™ of IC501
Measuring Instrument
Frequency counter
Adjustment Page
F
Adjustment Address
40
Specified Value
Pin #™ of IC301 :
f=4433594 ± 17Hz
Pin !™ of IC501 :
f=14187500 ± 55Hz
Adjusting method:
1)
1)
Select page: 0, address: 01, and set data: 01.
2)
Select page: 2, address: 01, set data: 41, and press the PAUSE
button of the adjustment remote commander.
button of the adjustment remote commander.
3)
Select page: 6, address: 61, and set data: 30.
4)
Select page: F, address: 40, change the data and set the clock
frequency (f) to the specified value.
frequency (f) to the specified value.
5)
Press the PAUSE button of the adjustment remote commander.
6)
Select page: 6, address: 61, and set data: 10.
7)
Select page: 2, address: 01, set data: 00, and press the PAUSE
button of the adjustment remote commander.
button of the adjustment remote commander.
8)
Select page: 0, address: 01, and set data: 00.
2. AFC f
0
Adjustment (VC-214 board)
Adjust the pull-in range of the A/D converted clock generator during
playback.
playback.
Mode
VTR stop
Signal
No signal
Measurement Point
Pin 4 of CN910 (AFC f0)
Measuring Instrument
Digital voltmeter
Adjustment Page
F
Adjustment Address
6A
Specified Value
A=2.00 ± 0.05Vdc
Adjusting method:
1)
1)
Select page: 0, address: 01, and set data: 01.
2)
Select page: 2, address: 01, set data: 4D, and press the PAUSE
button of the adjustment remote commander.
button of the adjustment remote commander.
3)
Select page: F, address: 6A, change the data and set the DC
voltage (A) to the specified value.
voltage (A) to the specified value.
4)
Press the PAUSE button of the adjustment remote commander.
5)
Select page: 2, address: 01, set data: 00, and press the PAUSE
button of the adjustment remote commander.
button of the adjustment remote commander.
6)
Select page: 0, address: 01, and set data: 00.
IC501
1
12
36
25
24
37
13
48
IC301
1
16
48
33
49
32
64
17
VC-214 BOARD
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