Sony ICF-6800W - VFO and Mixer Adjustments

ICF-6800W
6.
VFO
FREQUENCY
COVERAGE
7.
MIXER
BALANCE-2
ADJUSTMENT
ADJUSTMENT
(MW
FREQUENCY
COVERAGE ADJUSTMENT) Setting:
BAND SELECTOR switch: SW
MODE switch: WIDE
AM RF GAIN control: MAX
SW-ANT switch: ROD
Setting:
BAND SELECTOR switch: MW
VOLUME control: MAX
TONE controls: mechanical mid position
Frequency
Position of gear (A) aa |
(shaft to select Counter
MW or SW) Indication
1
full-counter-
L15
520
kHz
-
clockwise
stop
(+3
kHz)
1
full counter- 1,620 kHz i,
2
4
CTS
’
30
%
amplitude
|
2
clockwise
stop
crs
|
(#3
kHz)
modulation
by
EARPHONE
Repeat steps 1 and 2 if necessary. 400 Hz signal
Procedure:
AM rf signal
generator VOM
frange: 0.5—5 V ac}
main board
(component side)
Adjustment Location:
— main board —
gear
(A)
1.
Tune
in
to
20.1
MHz.
|
ee
©
2.
I, AM heir PRESELECTOR
sy Se a generator fre- | A osition
posh
quency
VOM
reading
around 19 MHz
19.055 MHz for a maximum VT2 | minimun
output level
Adjustment Location:
— main board —
—41—