Read Sony CCD-TR648E / CCD-TR748E / CCD-TR848 Service Manual online
5-32
CCD-TR648E/TR748E/TR848
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.
Y OUT level adjustment
4.
C OUT level adjustment
5.
REC Y current adjustment
6.
REC C/REC AFM current adjustment
1. 28 MHz Origin Oscillation Adjustment
(VC-272 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
R200 (Pin ul of IC151)
Measuring Instrument
Frequency counter
Adjustment Page
F
Adjustment Address
45
Specified Value
f = 3579545 ± 17Hz (NTSC)
f = 4433594 ± 17Hz (PAL)
f = 4433594 ± 17Hz (PAL)
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
6
61
30
Set the data.
3
2
01
41
Set the data, and press PAUSE
button.
button.
4
F
45
Change the data and set the
frequency (f) to the specified
value.
frequency (f) to the specified
value.
5
F
45
Press PAUSE button.
6
2
01
00
Set the data, and press PAUSE
button.
button.
7
6
61
10
Set the data.
8
0
01
00
Set the data.
2. AFC f
0
Adjustment (VC-272 board)
Adjust the pull-in range of the A/D converted clock generator during
playback.
playback.
Mode
VTR stop
Signal
No signal
Adjustment Page
F
Adjustment Address
5D
Note1:
Insert a plug into the S VIDEO or the A/V jack.
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
F
5D
50
Set the data, and press PAUSE
button.
button.
3
2
01
4D
Set the data, and press PAUSE
button.
button.
4
Wait for 0.5 sec.
5
6
01
C5
Set the data, and press PAUSE
button.
button.
6
6
02
Check that the data changes to
“01”. (Note2)
“01”. (Note2)
7
2
01
00
Set the data, and press PAUSE
button.
button.
8
6
01
00
Set the data, and press PAUSE
button.
button.
9
0
01
00
Set the data.
Note2:
The adjustment data will be automatically input to page: F, address:
5D.
5D.
VC-272 board
IC151
1
108
162
54
55
109
216
163
R200
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