Sony ICF-SW77 - X501 (6.275 MHz) Xtal Adjustment; AM 1 st IF Adjustment; AM 455 kHz IF Adjustment

ICF-SW77
X501 (6.275 MHz) X’tal Adjustment
Setup:
Band Selector: FM
Frequency: 89.300 MHz
frequency counter
AM 1st IF Adjustment
Setup:
Band Selector: AM
MODE Selector: WIDE
Frequency: 150 kHz for Display
VOLUME control: Arbitrary
AMRFSSG
Put the lead-wire
antenna close to
the set.
30% amplitude
modulation by
400 Hz signal
VTVM
(range: 0.5 - 5 V ac)
headphones jack
Procedure:
1. Tune in the set to the AM RF SSG frequency.
2. Adjust T9 for a maximum output level.
3. Adjust L302 and L303 alternately for a maximum and symmetrical
output level.
4. Final response should be as illustrated below.
T9 (center peak)
This response can be checked by detuning the set to upper and lower
sides of the center frequency in same amount, or by changing SSG
frequency with set’s frequency unchanged.
5. R e peat above steps several times until no further improvement is
obtained.
AM 455kHz IF Adjustment
Setup:
Band Selector: AM
MODE Selector: WIDE
VOLUME control: Arbitrary
Procedure:
1. Tune in the set to a known, stable and strong AM station.
2. Adjust T301 for a maximum output level.
Procedure:
Adjust CT501 for a 100 MHz ± 100 Hz reading.
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