Electrical Adjustments - Sony ICF-J1 Service Manual

0 dB=1 µV
[MW]
Setting:
Band switch : MW
Put the lead-wire
AM RF signal
antenna close to
generator
the set.
30% amplitude
modulation by
400 Hz signal
Output level: as low as possible
[SW]
Setting:
Band switch : SW
AM RF signal
generator
(ANT IN)
12 pF
30% amplitude
modulation by
400 Hz signal
Output level: as low as possible
[FM]
Setting:
Band switch : FM
FM RF signal
generator
(ANT IN)
0.01 µ F
22.5 kHz frequency
deviation by 400 Hz
signal
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.
• Remove FM/SW antenna in SW and FM adjustments.
SECTION 4

ELECTRICAL ADJUSTMENTS

TP8 (SP +)
level meter
8 Ω
+
set
–
TP9 (SP –)
TP8 (SP +)
TP1
level meter
8 Ω
+
set
–
TP9 (SP –)
TP8 (SP +)
TP1
level meter
8 Ω
+
set
–
TP9 (SP –)
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter
T1
MW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter
L5
CT1-4
MW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L1
CT1-1
SW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter
L6
CT6
SW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L2
CT5
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter
L4
CT1-3
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L3
CT1-2
Adjustment Location: MAIN board (See page 10)
– 9 –
455 kHz
516.5 kHz
1,631.5 kHz
600 kHz
1,400 kHz
4.7 MHz
18.5 MHz
4.75 MHz
18 MHz
87.35 MHz
108.25 MHz
87.5 MHz
108 MHz