Sony ICF-6800W - BFO, IF, and Preselector Adjustments

10. BFO ADJUSTMENT
Setting:
BAND SELECTOR switch: SW
Procedure:
oscilloscope
speaker
EARPHONE
. Set the receiver to tune in to 20.0 MHz.
,
Adjust
AM
RF
GAIN
control
to
set
the
TUNING
meter
to
about
“5”.
.
Adjust
L38
by
setting
the
MODE
switch
to
USB
and
LSB/CW
alternately
so
that
the
waveforms
and
tones
in
both
modes
become
the
same.
Adjustment Location:
— main board —
| ICF-6800W
11. 1st IF ALIGNMENT
Setting:
BAND SELECTOR switch:
Procedure:
AM ff signal
generator VOM
(range: 0.5 ~5V)
30 % amplitude
modulation by
400 Hz signal
EARPHONE
main board
(conductor side)
from signal
generator
Connect the emitter
to ground,
Adjustment Location:
— main board —
IFT-A2 IFT-Al 1FT-A3
—~43-—