Sony AV-3600 Service Manual page 44

Preparation:
1.
Lift
the
orange
lead
of the cable to the
"A"
head
at
the
V2
Board and connect
the resistive
network shown
in Fig. 5-5.
2.
Connect the
Rf
Signal
Generator
as
shown.
Procedure:
(Head
Resonance Adjustment)
1.
Tune the
Signal
Generator to 4.5
MHz.
Set
output to 50
mV.
2.
Turn
on
the
Videocorder.
Set
the
Function
Lever to
FORWARD.
3.
Connect the scope
to
TP-201
.
4.
Adjust
C201
to
produce
a
maximum
amplitude
on
the scope.
Note
the reading
on
the
scope.
5.
Tune the Signal Generator to
500
kHz.
Keep
the
output
at
50
mV.
6.
Adjust
R201
so that the
amplitude
at
500
kHz
is
one fourth that at 4.5
MHz
(noted
in
Step
4),
that
is
amplitude
at
500 kHz
_
J_
amplitude
at
4.5
MHz "
4
Note the amplitude
at
500 kHz.
7.
Lift
the orange lead
of the cable to the
"B"
head
at
the
V2
Board and connect the
Rf
Signal
Generator
in place,
using the resistive
network
as in Steps
1
and
2 of "Preparation".
8.
Adjust
C202 and
R202
of
Channel
B
in
the
same
manner
as in
Steps
1
to
6.
(Midrange Equalization Adjustment)
9.
Tune
the
Rf
Signal
Generator
to 3.5
MHz
10.
Adjust
L204
to
produce
maximum
amplitude
at
TP-201.
Note
the reading
on
the scope.
11.
Tune
the
Rf
Signal Generator to
500 kHz.
12.
Adjust
R211
to
produce the correct output
amplitude
at
TP-20
1 ,
as f
ollows.
amplitude
at
500 kHz
_
1
amplitude
at 3.5
MHz
3.5
(obtained
in
Step
10)
The
frequency response
chracteristic
should
now
be
set
correctly as
shown
in Fig. 5-4.
5-6