Read Sony ICF-903L Service Manual online
– 6 –
16
Ω
set
v
jack (EPJ1)
level meter
16
Ω
set
v
jack (EPJ1)
level meter
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
AM RF signal
generator
generator
400Hz, 30%
AM modulation
Output level: as low as possible
AM modulation
Output level: as low as possible
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
AM RF signal
generator
generator
400Hz, 30%
AM modulation
Output level: as low as possible
AM modulation
Output level: as low as possible
SECTION 3
ELECTRICAL ADJUSTMENTS
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
done by the trimmer capacitors.
MW IF ADJUSTMENT
Adjust for a maximum reading on level meter
T1
455 kHz
MW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter
L5
520 kHz
CT4
1,650 kHz
MW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L2-1
600 kHz
CT1
1,400 kHz
3-1. MW SECTION
BAND switch : MW
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
done by the trimmer capacitors.
LW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter
CT6
145 kHz
<confirmation>
265 kHz
LW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L2-2
160 kHz
CT2
240 kHz
3-2. LW SECTION
BAND switch : LW
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