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Sony ICF-SW40 - Page 9

Sony ICF-SW40
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FM
SECTION
FM
RF
signal
generator
0.01
uF
telescopic
antenna
terminal
(Co
22.5kHz
frequency
deviation
by
400Hz
signal.
Output
level
:
as
low
as
possible
level
meter
@
Repeat
the
procedures
in
each
adjustment
several
times,
and
the
tracking
adjustments
should
be
finally
done
by
the
trimmer
capacitors.
VCO
Voitage
Check
Note
:
1)
This
adjustment
should
be
performed
after
the
AM
VCO
voltage
adjustment.
2)
Test
point
is
identical
the
AM
VCO
voltage
adjustment.
Setting
:
VOLUME
:
maximum
BAND
:
FM
Procedure
:
1.
Tune
the
set
to
76.0MHz.
2.
Confirm
that
the
voltage
reading
on
the
voltmeter
is
2.0
—~
4.0V.
1.
Tune
the
set
to
FM
108.0MHz.
2.
Confirm
that
the
voltage
reading
on
the
voltmeter
is
8.7
—
10.7V.
FM
Tracking
adjustment
Setting
:
VOLUME
:
maximum
BAND
:
FM
Procedure
:
;
1.
Set
the
frequencies
of
the
FM
RF
SG
and
the
frequency
display
of
the
set
to
76.0MHz.
2.
Adjust
L13
to
obtain
a
maximum
reading
on
the
level
meter.
3.
Set
the
frequencies
of
the
FM
RF
SG
and
the
frequency
display
of
the
set
to
108.OMHz.
4.
Adjust
CT1
to
obtain
a
maximum
reading
on
the
level
meter.
5.
Repeat
the
above
steps
several
times.
FM
VCO
Adjustment
Setting
:
VOLUME
:
maximum
BAND
:
FM
Servicing
tool
Rye
cree
ee
Ge
Ne
pepe
spe
l
DC
5V
frequency
counter
:
I
‘
(MAIN
BOARD]
(Conductor
Side)
.
Insert
the
HEADPHONES
into
PHONES
jack.
Connect
a
capacitor
(10uF)
between
pin
21
of
IC3
and
Ground.
.
Tune
the
set
to
FM
98MHz.
.
Adjust
RV1
to
obtain
75.8
—
76.2kHz
on
the
frequency
counter.

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