Read Sony ICF-1000L Service Manual online
– 7 –
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.
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
MW IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
455kHz
MW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L4
520kHz
CT4
1,650kHz
MW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L2-1
600kHz
CT1
1,400kHz
3-1. MW SECTION
BAND switch : MW
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
16
Ω
set
v
jack (EPJ401)
level meter
•
Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
3-2. LW SECTION
BAND switch : LW
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
16
Ω
set
v
jack (EPJ401)
level meter
•
Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
SW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L5
5.8MHz
CT5
18.5MHz
SW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
5.8MHz
CT3
18.5MHz
3-3. SW SECTION
BAND switch : SW
telescopic
antenna terminal
antenna terminal
12 pF
AM RF signal
generator
generator
400Hz, 30%
AM modulation
Output level: as low as possible
AM modulation
Output level: as low as possible
set
16
Ω
set
v
jack (EPJ401)
level meter
3-4. FM SECTION
BAND switch : FM
telescopic
antenna terminal
antenna terminal
0.01
µ
F
FM RF signal
generator
generator
400Hz, 30% FM modulation
frequency deviation
frequency deviation
±
22.5kHz
Output level: as low as possible
set
16
Ω
set
v
jack (EPJ401)
level meter
LW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
CT6
145kHz
< confirmation >
265kHz
LW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L2-2
160kHz
CT2
240kHz
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