Sony ICF-303L - Section 3 Electrical Adjustments

Put the lead-wire
antenna close to
the set.
AM RF signal
generator
400Hz, 30%
AM modulation
Output level: as low as possible
16 Ω
set
earphone jack (EPJ1)
level mete
r
– 5 – – 6 –
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
LW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter
L5 145 kHz
CT1 265 kHz
LW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L1 160 kHz
CT2 240 kHz
Adjustment Location: MAIN BOARD
ICF-303L:
LW SECTION
BAND switch : LW
(303L)
(303L)
CT2
LW TRACKING( 303L)
ADJUSTMENT
CT1-1
AM TRACKING (303)
ADJUSTMENT
CT1-4
AM FREQUENCY
COVERAGE (303)
ADJUSTMENT
L2
FM TRACKING
ADJUSTMENT
L4
FM FREQUENCY
COVERAGE
ADJUSTMENT
L5
AM FREQUENCY COVERAGE (303)
LW FREQUENCY COVERAGE (303L
)
ADJUSTMENT
CT1-2
FM TRACKING
ADJUSTMENT
MAIN BOARD (COMPONENT SIDE)
CT1
LW FREQUENCY
COVERAGE (303L)
ADJUSTMENT
CT1-3
FM FREQUENCY
COVERAGE
ADJUSTMENT
L1
AM TRACKING (303)
LW TRACKING (303L)
ADJUSTMENT
16 Ω
set
earphone jack (EPJ1)
level mete
r
Put the lead-wire
antenna close to
the set.
AM RF signal
generator
400Hz, 30%
AM modulation
Output level: as low as possible
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
ICF-303:
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter
L4
86.5 (87.35)
<64> MHz
CT1-3 109.5 (108.25) MHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L2
86.5 (87.35)
<68> MHz
CT1-2
109.5 (108.25)
<102> MHz
NOTE :( ) : Italian model
< > : East European model
ICF-303L:
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter
L4 86.5 MHz
CT1-3 109.5 MHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L2 86.5 MHz
CT1-2 109.5 MHz
SECTION 3
ELECTRICAL ADJUSTMENTS
FM SECTION
BAND switch : FM
telescopic
antenna terminal
0.01
µ F
FM RF signal
generator
400Hz, 30% FM modulation
frequency deviation
± 22.5kHz
Output level: as low as possible
set
16 Ω
set
earphone jack (EPJ1)
level mete
r
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
AM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter
L5 520 (516.5) kHz
CT1-4 1,650 (1,631.5) kHz
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L1 600 (620) kHz
CT1-1 1,400 kHz
NOTE :no mark: ( ) : Italian model
ICF-303:
AM SECTION
BAND switch : AM