Electrical Adjustment; Mw Section; Lw Section; Sw Section - Sony ICF-1000L Service Manual

3-1. MW SECTION

BAND switch : MW
AM RF signal
generator
400Hz, 30%
AM modulation
Output level: as low as possible
set
v
jack (EPJ401)
• Repeat the procedures in each adjustment several times, and the
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
MW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L4
CT4
MW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L2-1
CT1

3-2. LW SECTION

BAND switch : LW
AM RF signal
generator
400Hz, 30%
AM modulation
Output level: as low as possible
set
v
jack (EPJ401)
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
SECTION 3
ELECTRICAL ADJUSTMENTS
Put the lead-wire
antenna close to
the set.
level meter
16 Ω
455kHz
520kHz
1,650kHz
600kHz
1,400kHz
Put the lead-wire
antenna close to
the set.
level meter
16 Ω
LW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
CT6
< confirmation >
LW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L2-2
CT2

3-3. SW SECTION

BAND switch : SW
AM RF signal
generator
400Hz, 30%
AM modulation
Output level: as low as possible
set
• Repeat the procedures in each adjustment several times, and the
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
CT5
SW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
CT3

3-4. FM SECTION

BAND switch : FM
FM RF signal
generator
400Hz, 30% FM modulation
frequency deviation ± 22.5kHz
Output level: as low as possible
set
– 7 –
145kHz
265kHz
160kHz
240kHz
telescopic
antenna terminal
12 pF
set
level meter
16 Ω
v
jack (EPJ401)
5.8MHz
18.5MHz
5.8MHz
18.5MHz
telescopic
antenna terminal
0.01 µ F
set
level meter
16 Ω
v
jack (EPJ401)