Sony ICF-SW40 - ELECTRICAL ADJUSTMENTS Cevvesssesssssccssscssseevcveeee

SECTION 3
ELECTRICAL ADJUSTMENTS
AM SECTION
LW:
AM PF signal
generator Put the lead-wire
antenna close to
aw the set.
(———
30% amplitude modulation by 400Hz
signal.
Output level : as low as possible
SW:
AM PF signal
generator —
0.01 uF telescopic
antenna
C=]
terminal
30% amplitude modulation by
400Hz signal.
Output level: as low as possible
level meter
VCO Voltage Adjustment
Setting :
VOLUME : maximum
BAND : LW/SW
SENS : DX
TONE : MUSIC
[MAIN BOARD] (Conductor Side)
vie che
c
i] i)
c
; voltmeter ;
ICAI
———————
Procedure : fe
1. Tune the set to LW 150kHz.
2. Adjust T3 to obtain a 1.1 — 1.3V on the voltmeter.
3. Tune the set to SW 261,000kHz.
4.
Confirm that the voltage reading on the voltmeter is 7.0 — 9.0V.
AM IF Adjustment
Setting :
VOLUME : maximum
voltmeter
(DC range)
‘Procedure :
1. Set the frequencies. of the AM RF SG and the frequency display
of the set to SW 3,850kHz. _
2. Confirm that the voltage reading on the voltmeter is 11.5 —
14.5V. ae . Pee
3. Adjust Tl and T4 maximum output level. |