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3-2.
AM SECTION
Sw
AM rf signal
generator
CON
30% amplitude
modulation by
400 Hz signal
main board — conductor side —
MW
AM rf signal
generator
4
ntenna
close
to
T
.
—,
ac.
ai
{ ange.
0.5-5V
7]
C
30% amplitude
modulation
by
400 Hz signal
Note:
¢
Repeat
the
procedures
in each
adjustment
several times, and the frequency coverage and
tracking adjustments should be finally done by
the trimmer capacitors.
e
After adjusting the SW frequency coverage and
tracking adjustments perform
the MW
adjust-
ments.
EARPHONE
MW TRACKING ADJUSTMENT
Adjust for a maximum
reading
on VOM (1).
1,400 kHz
600 kHz
468 kHz
ADJUSTMENT
on VOM '@) 7
1,680 kHz
520 kHz
Adjust for a maximum
reading
12.3 MHz
3.8 MHz
ICF-7800
3-3.
TIMER
ADJUSTMENT
Setting:
POWER
switch:
ON
Timer set control:
minimum
Procedure:
MAX
timer set control
(VR4)
MIN
timer select
switch (S2)
MINUTES < OFF > HOURS
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