Sony WM-AF22 - Tuning and Speed Adjustments; Tape Speed Adjustment; FM;MW Tuning Adjustments

Tape Speed Adjustment
Procedure :
Mode : playback
speed checker or
test
tape
digital
frequency
WS-48A
counter
(3kHz,0dB)
headphones jack
(earphones)
Specification :
speed checker digital frequency counter
Frequency difference between the beginning and the end
of the tape should be within+2.5% (+75%Hz).
Adjustment Location
ELECTRICAL ADJUSTMENTS
-|TUNER SECTION
AM rf signal
generator
Put the lead-wire
antenna close to the set.
30% amplitude
ei modulation by
400Hz signal
Output lavel: as low as possible
=
FM rf signal
generator
22.5kHz frequency
deviation by 1kHz signal ;
Output level: as low as possible FM antenna terminal
Note :
For adjustment of WM—BF22/BF28 BAND SW at STEREO.
WM-AF22/AF28/BF22/BF28
headphones jack
@Repeat the procedures in each adjustment several times,
and the frequency coverage and tracking adjustments
should be finally done by the trimmer capacitors.
( ):WG model
: f ):IT model
FM Frequency Coverage Adjustment ((.)) = WG, IT model
Pointer Adjustment
SG jeaueney
position part
86.0MHz
((87,.35MHz))
109.5MHz
(107.8MHz)
[108,25MHz]
‘f minimum
maximum
FM Tracking Adjustment
frequency
86. OMHz maximum
(87,35MHz) .
- 109.5MHz
(107.8MHz) maximum
[108.25MHz]
os Frequency Coverage Adjustment
pen Adjustment Reading on |
, 505kHZ -
minimum ((51 6 '5kHz))
maximum
, 1,680kHz
meumum ((1,631.3kHz))
MW Tracking Adjustment
SG and set
frequency
maximum
MW IF Alignment
SG and set
frequency
455kHz (468kHz) a a a maximum
( ): UK model
ADJUSTMENT LOCATION
14 ’ Jr
‘Gu
component side
— 5h —