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M
-17.
REC
ATF
Recording Current Adjustment
(SV-35
Board)
Mode
Recording
Signal
Non-signal
Measurement Point
Pin® of IC50l(Fig. S.22
®>
Measuring Instrument Oscilloscope
Adjusting Element
RV503
Specified Value
13.5
±
1.0 mVp-p
Notes
:
1)
Use
an MP-type tape (level at Pin
®
of CN006 must be low).
2)
If
level
at Pin ® of
IC501
is
too low
and difficult
to measure,
connect directly
through
a
100
Q
resistor as shown in
the figure
below
rather than
using a
10:
1
probe.
Pin
@of
IC501
Oscilloscope
1000
~N: ~~
®l
..
:-"""' \ MIV.--+J-+-----+:0-+--•
(RP
block
shield case)
Connections :
Coaxial cable
(less
than 1 00 pF)
Fig.
8-26.
1)
In
order
to
prevent
other recording
signals
from
interfering,
make the
following
two
connections
with
jumper
wires
:
•Emitter
of
Q803
(REC
Y)
-
GND
•Terminal
on
the
C006 side of RV505
(Fig.
8-22
<C
:
REC AFM) -
GND
*
Use
the
RP
block shield
case
as
GND.
Adjusting
method
:
1)
Adjust
to 13.5
±
1.0 mVp-p with
RV503.
µsec~
I
Middle of the line
width
-,
13.5
±
1.0 mVp-p
_J
Middle
of
the line
width
Fig.
8-27.
REC ATF
recording current
adjustment
8-4-18.
Deley Chrome Gain Adjustment (SV-35
Board)
Mode
Playback pause (LP
mode)
Alignment
tape for
operation
Signal
check
(WR5-3CL).
color
bars
CH 1 :
Pin
®
of IC600
Measurement Point
(or
Emitter
of
Q904 )
CH2 :
Pin
@
of
IC900
Measuring Instrument
Oscilloscope
(TRIG
: CH2)
Adjusting Element
RV901
Specified Value
Delay chroma level
is
same
as
through
chroma level
Adjusting
method
:
1)
Adjust RV901 until
the
delay
chroma level
is
the
same
as
the through
chroma
level.
CH1
CH2
Through
chroma
level
+
t
Through period
(
2V)
Fig.
8-28.
Delay
chroma
level
+
t
Delay
period
(
2V)
-
162
-
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