
5-44
A
0.18
µ
sec
Fig. 5-3-9.
6. REC Y Current Adjustment (VC-251 board)
Adjust the Y FM signal recording current.
Mode
VTR recording (SP mode)
Signal
No signal
Measurement Point
REC RF (Pin
qg
of CN713 or Pin
qg
of CPC connector of FP-262 flexible)
Measuring Instrument
Oscilloscope
(20 MHz BW LIMIT: OFF)
Adjustment Page
F
7
Adjustment Address
6A, 6B
F9
Specified Value
A=235 ± 5mV (NTSC)
A=280 ± 5mV (PAL)
Note1:
Don’t disconnect the DC power supply of the camcorder during
the following adjustments.
When the following symptom occurs, reset the data of D page to
the values written down.
1) The power is shut off so that unit cannot operate.
Adjusting method:
Order Page Address Data
Procedure
1
Set to the stop mode.
2
0
01
01
Set the data.
3
D
14
Write down the data.
4
D
14
Set the following data, and press
PAUSE button.
06 (NTSC), 26 (PAL)
5
D
15
Write down the data.
6
D
15
Set the following data, and press
PAUSE button.
6D (NTSC), 6F (PAL)
7
Set to VTR recording mode.
(Note2)
8
E
FB
Write down the data.
9
E
FB
06
Set the data, and press PAUSE
button.
10
F
71
Write down the data.
11
F
71
00
Set the data, and press PAUSE
button.
12
2
01
41
Set the data, and press PAUSE
button.
13
6
63
01
Set the data.
14
F
6B
Change the data and set the Y
signal level (A) to the specified
value, and press PAUSE button.
15
F
6B
Read the data, and this data is
named D
6B
.
16
F
6A
D
6B
Set the data, and press PAUSE
button.
17
Convert D
6B
to decimal notation,
and obtain D
6B
’. (Note3)
18
Calculate D
F9
’ using following
equations (Decimal calculation)
When D
6B
’ 243
D
F9
’ = D
6B
’ + 12
When D
6B
’> 243
D
F9
’ = 255
19
Convert D
F9
’ to a hexadecimal
number, and obtain D
F9
. (Note3)
20
7
F9
D
F9
Set the data, and press PAUSE
button.
21
6
63
00
Set the data.
22
2
01
00
Set the data, and press PAUSE
button.
23
F
71
Set the data written down at step
10, and press PAUSE button.
24
E
FB
Set the data written down at step
8, and press PAUSE button.
25
D
14
Set the data written down at step
3, and press PAUSE button.
26
D
15
Set the data written down at step
5, and press PAUSE button.
27
0
01
00
Set the data.
Note2:
Use the REC buttons of the adjustment remote commander (with
the HOLD switch set in the OFF position).
Note3:
Refer to “Table 5-4-1. Hexadecimal-decimal Conversion Table”.
Ver 1.1 2001. 04
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