Sony WM-FX483 - TUNER SECTION; AM Tuning Voltage Adjustment; AM IF Adjustment, AM Tracking Adjustment; FM Tuning Voltage Adjustment

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TUNER SECTION
[AM]
Setting :
RADIO ON/BAND switch : ON/AM
AM Tuning Voltage Adjustment
( ) : Except US, Canadian models
AM IF Adjustment, AM Tracking Adjustment
• Repeat the procedures in each adjustment several times, and the
frequency coverage and tracking adjustments should be finally
done by the trimmer capacitors.
( ) : Except US, Canadian models
( ) : Except US, Canadian models
[FM]
Setting :
RADIO ON/BAND switch : ON/FM
FM Tuning Voltage Adjustment
FM Tracking Adjustment
[ ] : East European model
AM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L4 620kHz (621kHz)
CT2 1,400kHz (1,395kHz)
Set
PHONES
+
–
FM RF signal
generator
75kHz frequency
deviation by 1KHz signal.
Output level : as low as possible.
0.01 µ F
to IC1 pin
1
Level meter
(AC : 0.5 – 5V range)
16
Ω
AM RF signal
generator
30% amplitude modulation
by 400Hz signal.
Output level : as low as possible
Put the lead-wire antenna
close to the set.
Set
jack
16
Ω
+
–
Level meter
(AC : 0.5 – 5V range
)
2
+
–
digital voltmete
r
(VT)
(GND)
MAIN board
AM TUNING VOLTAGE ADJUSTMENT
Adjust for a 1.5 ± 0.03Vde reading on digital voltmeter.
L3
530kHz
(531kHz)
AM IF ADJUSTMENT
Adjust for a maximum reading on level meter.
T1
1,000 (999) kHz
+
–
digital voltmete
r
(VT)
(GND)
MAIN board
FM TUNING VOLTAGE ADJUSTMENT
Adjust for a 10.0 ± 0.03Vde reading on digital voltmeter.
L2 108MHz
FM TRACKING ADJUSTMENT
Adjust for a maximum reading on level meter.
L1
87.5MHz
[65.0MHz]
CT1 108MHz