Sony ICF-6800W - SECTION 3 ADJUSTMENTS; FM Alignment and Tracking

SECTION 3
ADJUSTMENTS
1.
FM
IF
ALIGNMENT
Procedure:
| ICF-68O0OW
2.
FM
FREQUENCY
COVERAGE
ADJUSTMENT
e
Repeat
the
procedures
in
each
adjustment
several
times,
and
the
frequency
coverage
and
3.
FM
TRACKING
ADJUSTMENT
tracking
adjustments
should
be
finally
done
by
the trimmer capacitors.
Setting:
BAND SELECTOR switch: FM
AFC switch: OFF
VOLUME control: MAX
TONE controls: mechanical
mid positions
FM rf signal
vom (1)
(range: 0.5 — 5 V ac)
generator
.
EARPHONE
CAS
+22 5kHz frequency
deviation by 400 Hz
signal
(modulation turned off
for IF Alignment 2.)
FM FREQUENCY COVERAGE
ADJUSTMENT
Adjust for a maximum reading on
VOM (1).
109.5 MHz 86.5 MHz
(108 MHz) (87.5 MHz)
(_ ): In West Germany
baw
vom @)
0.25-1VDC
FM IF ALIGNMENT 2
(10.7 MHz without modulation
Adjust for 0 V reading
on VOM (2).
109.5 MHz 86.5 MHz
(108
MHz)
(87.5
MHz)
Adjust
for
a
maximum
reading
Adjust
for
a
maximum
reading
on
VOM
(2).
on
VOM
()
.
FM
TRACKING
ADJUSTMENT
FM
IF
ALIGNMENT
1
(10.7
MHz
with
modulation)
( ): In West Germany
~ 39—
IFT F3