Sony ICF-7800 - SECTION 3 ADJUSTMENTS - FM (Continued); FM Frequency Coverage Tuning

ICF-7800
ICF-7800
3-1.
FM
SECTION
oe
a
When
fixing
the
lamp,
remove
the
dial
film
chassis.
FM
rf
signal
generator
Twist
one
turn.
(AY
Push
the
lead
wires
in
O
with
cushion.
‘
+22.5kHz
frequency
adhesive
tape
deviation
by
400
Hz
f
®
g
,
.
eg
;
a
‘a
Fix
the
lamp
with
tines
a
i
he
ls
,
main
board
—
conductor
side
—
double-side-adhesive
Alignment
2.)
tape.
4
e
.
VOM
(1)
|
(range:
0.5—5
V ac)
.
Pas,
Twist
the
lead
wires.
set
|
—_—_—
‘
EARPHONE
clamp
Note:
Repeat
the
procedures
in
each
adjustment
several
times,
and
the
frequency
coverage
and
tracking
adjustments
should
be
finally
done
by
the
trimmer
capacitors.
Push
the
slacken
lead
wire
into
the
chassis.
:
FM
TRACKING
ADJUSTMENT
7
Adjust
for
a maximum
reading
on
VOM
©)
f
87.1
MHz
(87.5
MHz)
108.5
MHz
(108
MHz)
(
):
in
West
Germany
FM
IF
ALIGNMENT
2
i
(signal
generator
OFF)
:
,
f
#
Adjust
for
OV
reading
on
I
2
‘
:
ome
ae
VOM @).
: IFT F1 (BLU)
FM IF ALIGNMENT 7
(10.7 MHz with modulation)
Adjust for a maximum reading
on VOM (1).
(BLU)
IFTF1 9RG)
VOM (2)
(range: 1V dc)
Me
(J: in West Germany
C
C
Fn RRC Te ORE aI eS ET OE TE ee
conductor side