Sony ICF-J1 Service Manual ▷ View online
– 7 –
SECTION 3
ASSEMBLY
Note:
Follow the assembly procedure in the numerical order given.
DIAL POINTER SETTING
• RACK
• RACK
• MAIN BOARD
4
pointer
3
Mount the back plate,
meeting with two bosses of
the chassis.
meeting with two bosses of
the chassis.
1
rack
6
gear, midway
5
shaft, tuning
boss
chassis
boss
2
Meet the portion of
the rack with the mark
of the chassis.
the rack with the mark
of the chassis.
chassis
mark
a
a
b
b
rack
2
claw
3
LED LN21RPL (TUNE) (D2)
4
screw
(BTP3
(BTP3
×
12)
1
MAIN board
2
claw
– 8 –
• “GEAR (TUNING CAPACITOR)”, “SPRING (GEAR)” AND “GEAR (B), TUNING CAPACITOR”
“GEAR (TUNING CAPACITOR)”, “SPRING (GEAR)” AND “GEAR (B), TUNING CAPACITOR” SETTING
gear, midway
1
Turn variable condenser (CV1)
shaft fully to the arrow direction
(ant1-clok wise).
shaft fully to the arrow direction
(ant1-clok wise).
Note: Make sure that two tuning capacitor gears
are meshing with the midway gear.
gear, midway
triangle mark
triangle mark
3
screw (B2.6
×
5)
Note: Secure screw.
5
screw (BTP3
×
12)
4
holder (gear)
2
gear (tuning capacitor)
Including “spring (gear)”,
“gear (B), tuning capacitor”.
Including “spring (gear)”,
“gear (B), tuning capacitor”.
Note: Adjust so that the triangle
marked is at the position
shown and install.
shown and install.
(
)
gear (tuning capacitor)
1
Insert the spring (gear)
into a hole in the gear
(tuning capacitor).
into a hole in the gear
(tuning capacitor).
2
Fit the tuning capacitor gear (B)
to the gear (tuning capacitor),
and then turn the tuning capacitor gear (B)
in the
to the gear (tuning capacitor),
and then turn the tuning capacitor gear (B)
in the
A
direction.
A
3
Engage the spring (gear)
to the hook of the tuning
capacitor gear (B) as shown.
to the hook of the tuning
capacitor gear (B) as shown.
hook
spring (gear)
– 9 –
AM 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
516.5 kHz
CT1-4
1,631.5 kHz
MW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L1
600 kHz
CT1-1
1,400 kHz
SW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter
L6
4.7 MHz
CT6
18.5 MHz
SW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L2
4.75 MHz
CT5
18 MHz
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter
L4
87.35 MHz
CT1-3
108.25 MHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter
L3
87.5 MHz
CT1-2
108 MHz
Adjustment Location: MAIN board (See page 10)
SECTION 4
ELECTRICAL ADJUSTMENTS
0 dB=1
µ
V
[MW]
Setting:
Band switch : MW
Band switch : MW
[SW]
Setting:
Band switch : SW
Band switch : SW
[FM]
Setting:
Band switch : FM
Band switch : FM
• 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.
• Remove FM/SW antenna in SW and FM adjustments.
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
Output level: as low as possible
modulation by
400 Hz signal
Output level: as low as possible
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
+
–
–
level meter
set
8
Ω
TP9 (SP –)
TP8 (SP +)
AM RF signal
generator
30% amplitude
modulation by
400 Hz signal
Output level: as low as possible
modulation by
400 Hz signal
Output level: as low as possible
+
–
–
level meter
TP9 (SP –)
TP8 (SP +)
TP1
(ANT IN)
set
8
Ω
12 pF
FM RF signal
generator
22.5 kHz frequency
deviation by 400 Hz
signal
Output level: as low as possible
deviation by 400 Hz
signal
Output level: as low as possible
+
–
–
level meter
TP9 (SP –)
TP8 (SP +)
TP1
(ANT IN)
set
8
Ω
0.01
µ
F
– 10 –
Adjustment Location:
L1 CT1-1
MW Tracking
Adjustment
L3 CT1-2
FM Tracking Adjustment
T1
AM IF Adjustment
SW Tracking
Adjustment
L2 CT5
– MAIN BOARD (Component Side) –
MW Frequency
Coverage
Adjustment
CT1-4 L5
SW Frequency Coverage
Adjustment
CT6 L6
CT1-3 L4
FM Frequency Coverage
Adjustment
– MAIN BOARD (Conductor Side) –
TP1 (ANT IN)
TP2 (GND)
TP9 (SP –)
TP8 (SP +)
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