Sony ICF-SW10 - Electrical Adjustments

SECTION 3
ELECTRICAL ADJUSTMENTS
© This adjustment should be executed after MW band adjustment
3-1. RADIO SECTION
@FM Section
Setting :
BAND switch: FM
FM ¢f signal
generator
22.5kHz frequency
deviation by 400Hz signal
output level : as low as possible
telescopic antenna
input
« MW/LW Section
Setting :
BAND switch : MW/LW
AM ff signal
generator
Put the lead-wire
antenna close to
the set.
(qa
30% amplitude
modulation by
400Hz signal
output level : as low as possible
* SW Section
Setting :
BAND switch : SW1—SW9
AM ff signal
generator
30% amplitude
modulation by
400Hz signal
output level : as low as possible
telescopic antenna
input
VTVM
(range: 0.5—5V ac)
Phones jack
@ Repeat the procedures in each adjustment several times,
and the frequency coverage and tracking adjustments
should be finally done by the trimmer capacitors.
is completed because the LW and SW bands use the BAR
ANT and CV1 in common with the MW band.
Therefore, if MW band is adjusted, the LW and SW bands
must also be readjusted.
FM FREQUENCY COVERAGE
ADJUSTMENT
Adjust for a maximum reading on VT VM.
87.3MHz 108.3MHz
MW FREQUENCY COVERAGE
ADJUSTMENT
Adjust for a maximum reading on VTVM.
520kHz 1.650kHz
AM IF ADJUSTMENT
Adjust for a maximum reading on VT VM.
Tl
455kHz
ADJUSTMENT
© Preparation for SW band adjustment
After making sure that the MW band adjustment has completed,
set the pointer to the center of character of 6.0, 7.2, 11.8 or
21.6MHz which is reference position of dial character, and fix
the CV1 at this position.