Sony SRF-M100 - Section 4 Electrical Adjustments; Main Board (Component Side)

SECTION 4
ELECTRICAL ADJUSTMENTS
©
Be
sure
to
perform
a
AM
tracking
adjustment
after
having
made
a
AM
frequency
coverage
adjustment.
Setting:
BAND SW : AM
STEREO /MONO SW : MONO
AM PF signal
generator
Put the jead-wire
VA antenna close to
the set.
Cd
Phones jack
30% amplitude modulation by 400Hz
Signal.
Output level : as low as possible.
AM IF Adjustment
Procedure :
1. Set the frequency of the set and RF SSG at 531 KHz.
2. Adjust T1 so that the reading of VTVM becomes
maximum.
3. Refer to the diagram below for the final characteristics.
ae
(final characteristics)
T1
{MAIN BOARD (Conductor side)] {MAIN BOARD (Component side))
digital
voltmeter
AM
Frequency
Coverage
Adjustment
AM
Tracking
Adjustment
Procedure
:
Procedure
:
1.
Set
the
frequency
of
the
set
and
RF
SSG
at
531kHz.
1,
Set
the
frequency
of
the
set
and
RF
SSG
at
585kHz.
2.
Adjust
LS
so
that
the
voltage
between
TP4
and
the
2.
Adjust
L1
so
that
the
reading
of
VTVM
becomes
ground
becomes
|
+
0.05V.
maximum.
3.
Set
the
frequency
of
the
set
and
RF
SSG
at
1,602kHz.
3.
Set
the
frequency
of
the
set
and
RF
SSG
at
1,485kHz.
4,
Adjust
CT3
so
that
the
voltage
between
TP4
and
the
4.
Adjust
CT1
so
that
the
reading
of
VTVM
becomes
ground
becomes
7.3
+
0.05V.
maximum.
5.
Repeat
the
adjusting
steps
above
two
or
three
times.
@
Terminate
the
AM
tracking
adjustment
by
adjusting
the
trimmer capacitor.