Read Sony DCR-TRV130 / DCR-TRV130E (serv.man2) Service Manual online
5-40
3-3.
SERVO AND RF SYSTEM ADJUSTMENT
Before perform the servo and RF system adjustments, check that
the specified value of “27MHz Origin Oscillation Adjustment” of
“VIDEO SYSTEM ADJUSTMENT” is satisfied.
the specified value of “27MHz Origin Oscillation Adjustment” of
“VIDEO SYSTEM ADJUSTMENT” is satisfied.
Adjusting Procedure:
1.
1.
REEL FG adjustment
2.
Cap FG duty adjustment
3.
PLL fo & LPF fo pre-adjustment
4.
Switching position adjustment
5.
AGC center level
6.
APC & AEQ adjustment
7.
PLL fo & LPF fo fine adjustment
1. REEL FG Adjustment (VC-256 Board)
Compensates the dispersion of the hall elements.
Measurement Point
Display data of page: 3, address: 03
Measuring Instrument
Adjustment remote commander
Adjustment Page
C
Adjustment Address
17, 30
Specified Value
00 or 01 or 04 or 05
Adjusting method:
Order Page Address Data
Procedure
1
Close the cassette compartment
without inserting a cassette.
without inserting a cassette.
2
0
01
01
Set the data.
3
3
01
1C
Set the data, and press PAUSE
button.
button.
4
3
02
Check that the data changes to
“00”,
“00”,
5
3
03
Check that the data is “00” or
“01” or “04” or “05”. (Note)
“01” or “04” or “05”. (Note)
6
0
01
00
Set the data.
Note:
If the data is other value, adjustment has errors. (Take an appropriate
remedial measures according to the errors referring to the following
table.)
remedial measures according to the errors referring to the following
table.)
Data
Contents of defect
02, 03, 06, 07
T reel is defective
08, 09, 0C, 0D
S reel is defective
0A, 0B, 0E, 0F
S reel and T reel are defective
2. CAP FG Duty Adjustment (VC-256 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 SLOW playback mode.
capstan servo. If deviated, the uneven rotation of capstan and noise
can occur in the SLOW playback mode.
Mode
Playback without cassette
Signal
No signal
Measurement Point
Display data of page: 6, address: 02
Measuring Instrument
Adjustment remote commander
Adjustment Page
F
Adjustment Address
64
Specified value
01
Adjusting method:
Order Page Address Data
Procedure
1
Close the cassette compartment
without inserting a cassette.
without inserting a cassette.
2
0
01
01
Set the data.
3
D
10
12
Set the data, and press PAUSE
button.
button.
4
8
0A
FD
Set the data, and press PAUSE
button.
button.
5
8
2A
C8
Set the data, and press PAUSE
button.
button.
6
Set to the playback mode without
cassette.
cassette.
7
6
01
00
Set the data, and press PAUSE
button.
button.
8
6
01
81
Set the data, and press PAUSE
button.
button.
9
6
02
Check that the data changes to
“01” within 6 seconds. If not,
return to step 7.
“01” within 6 seconds. If not,
return to step 7.
10
6
01
00
Set the data, press PAUSE
button.
button.
11
D
10
00
Set the data, and press PAUSE
button.
button.
12
8
0A
FF
Set the data, and press PAUSE
button.
button.
13
8
2A
00
Set the data, and press PAUSE
button.
button.
14
0
01
00
Set the data.
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