Read Sony CCD-TR648E / CCD-TR748E / CCD-TR848 Service Manual online
5-31
CCD-TR648E/TR748E/TR848
3-2. SYSTEM CONTROL SYSTEM ADJUSTMENT
1. Initialization of D, E, F, 7 Page Data
1. Initialization of D, E, F, 7 Page Data
If the D, E, F, 7 page data is erased due to some reason, perform “1-
2. INITIALIZATION OF D, E, F, 7 PAGE DATA”, of “5-1.
CAMERA SECTION ADJUSTMENT”
2. INITIALIZATION OF D, E, F, 7 PAGE DATA”, of “5-1.
CAMERA SECTION ADJUSTMENT”
3-3. SERVO ADJUSTMENT
1. CAP FG Offset Adjustment (VC-272 board)
1. CAP FG Offset Adjustment (VC-272 board)
Set the Cap FG signal duty cycle to 50% to establish an appropriate
capstan servo. If deviated, the uneven rotation of capstan and noise
can occur in the LP mode.
capstan servo. If deviated, the uneven rotation of capstan and noise
can occur in the LP mode.
Mode
Camera recording (SP mode)
Subject
Arbitrary
Measurement Point
CAP FG (Pin 4 of CN713)
Measuring Instrument
Oscilloscope
Adjustment Page
F
Adjustment Address
59
Specified value
Duty = 50 ± 1 %
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
6
01
81
Set the data, and press PAUSE
button.
button.
3
6
02
Check that the data changes to
“01”.
“01”.
4
6
01
00
Set the data, and press PAUSE
button.
button.
5
Check that Duty of CAP FG signal
satisfies the specified value. If not,
repeat steps 2 to 5.
satisfies the specified value. If not,
repeat steps 2 to 5.
6
0
01
00
Set the data.
2. Switching Position Adjustment (VC-272 board)
If deviated in this case causes switching noise or jitter on the played
back screen.
back screen.
Mode
Playback
Signal
Alignment tape:
For tracking adjustment
(WR5-1NP (NTSC)),
(WR5-1CP (PAL))
(WR5-1NP (NTSC)),
(WR5-1CP (PAL))
Measurement Point
CH1: SWP (Pin 5 of CN713)
CH2: PB RF (Pin 9 of CN713)
CH2: PB RF (Pin 9 of CN713)
Measuring Instrument
Oscilloscope
Adjustment Page
F
Adjustment Address
5A, 5B
Specified Value
t1 = 0 ± 10
µ
sec
Adjusting Method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
F
20
40
Set the data, and press PAUSE
button.
button.
3
F
5A
Change the data and minimize
“t1”. (Coarse adjustment)
“t1”. (Coarse adjustment)
4
F
5A
Press PAUSE button
5
F
5B
Change the data and adjust so
that the switching position (t1)
becomes the specified value.
(Fine adjustment)
that the switching position (t1)
becomes the specified value.
(Fine adjustment)
6
F
5B
Press PAUSE button
7
F
20
00
Set the data, and press PAUSE
button.
button.
8
0
01
00
Set the data.
A
B
Duty = A/B
×
100 [%]
Center of movement
CH1
CH2
Enlargement
t1=0
±
10
µ
sec
CH1
CH2
Fig. 5-3-4.
Fig. 5-3-5.
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