Read Sony ICF-403S Service Manual online
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SECTION 3
DIAL POINTER INSTALLATION
Note :
Follow the installation procedure in the numerical order given.
1
Rack
6
Rack
5
Knob (tone)
5
3
Knob (tune)
2
Pointer
Chassis
Chassis
4
Scribed line
Claws
Main board
S2
1 Insert the rack into the chassis groove.
2 Install the pointer.
3 Install the knob (tune).
4 Slide the rack and align it with the groove on the scribed
2 Install the pointer.
3 Install the knob (tune).
4 Slide the rack and align it with the groove on the scribed
line.
5 Align the knob (tone) and the S2.
6 Install the chassis to the main board.
6 Install the chassis to the main board.
1 Turn the CV shaft all thye way counterclockwise.
2 Set the gear ASSY onto the CV shaft in a
2 Set the gear ASSY onto the CV shaft in a
direction as a figure.
3 Secure the gear ASSY with screw.
Gear (A),tuning capacitor
4
2
1
3
Stopper
Spring
(gear)
(gear)
Hole
A
Projection
Gear (B),tuning capacitor
B
Hole
Spring (gear)
3
Screw (1.7x3)
2
Gear ASSY
1
CV shaft
Main board
Knob (tune)
1 Put a point of spring (gear) in a hole of “gear (A), tuning
capacitor” and install it.
2 Install “gear (B), tuning capacitor” in a direction as a figure.
3 Turn the “gear (B), tuning capacitor” till a position of B fits
3 Turn the “gear (B), tuning capacitor” till a position of B fits
A.
4 Hang the spring (gear) with a stopper.
SECTION 4
ELECTRICAL ADJUSTMENTS
TUNER SECTION
MW Section
Procedure :
BAND : MW
SW Section
Procedure :
BAND : SW
FM Section
Procedure :
BAND : FM
AM RF signal
generator
generator
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
signal.
Output level : as low as possible
Put the lead-wire
antenna close to
the set.
antenna close to
the set.
•
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.
< > : Saudi Arabia model
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
455kHz
MW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L5
520kHz
CT4
1,650kHz
MW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
620kHz
CT1
1,400kHz
SW FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L6
5.8MHz
CT6
18.5MHz
SW TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L2
5.8MHz
CT5
18.5MHz
FM FREQUENCY COVERAGE ADJUSTMENT
Adjust for a maximum reading on level meter.
L4
86.5MHz
<87.35MHz>
CT3
109.5MHz <108.25MHz>
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L3
86.5MHz
<87.35MHz>
CT2
109.5MHz <108.25MHz>
L6 : SW Frequency Coverage Adjustment
CT3 : FM Frequency Coverage Adjustment
L4 : FM Frequency Coverage Adjustment
L5 : MW Frequency Coverage Adjustment
CT6 : SW Frequency Coverage Adjustment
CT4 : MW Frequency Coverage Adjustment
T1 : AM IF Adjustment
L1 : MW Tracking Adjustment
CT1 : MW Tracking Adjustment
CT2 : FM Tracking Adjustment
CT5 : SW Tracking Adjustment
L2 : SW Tracking Adjustment
L3 : FM Tracking Adjustment
Adjustment Location : Main board (Component side)
AM RF signal
generator
generator
12PF
30% amplitude modulation by
400Hz signal.
Output level : as low as possible
400Hz signal.
Output level : as low as possible
telescopic
antenna
terminal
antenna
terminal
set
32
Ω
phone jack (J1)
level meter
FM RF signal
generator
generator
22.5kHz frequency deviation by
400Hz signal.
Output level : as low as possible
400Hz signal.
Output level : as low as possible
telescopic
antenna
terminal
antenna
terminal
0.01
µ
F
0dB=1
µ
V
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