Sony CFS-B31 Service Manual

Record/Playback Head Azimuth Adjustment
Procedure :
1. Mode : Playback
test tape
P-4-A063
(6.3 kHz, -10 dB) VTVM
ee jack
2. Turn the adjustment screw for the maximum output level. If
these levels do not match, turn the adjustment screw until
both of output levels match together within 2 dB.
L-CH
peak output
level
. ast
Screw
position
3. Phase Check
Mode : playback
test tape
P-4-A063
oscilloscope
(6.3 kHz, ~10 dB) L-CH
L-CH 320 |
phones jack RCH
inphase 45°
good
Adjustment Location :
adjustment screw
REC/PB head
TUNER SECTION
¢ Switch location
TONE sevcosscctetevorlreskecaeeens mechanical center
AM (LW) SECTION
BAND : AM (LW)
AM FF signal
generator
Put the lead-wire
Va antenna close to
the set.
C——
30% amplitued modulation
by 400 Hz signal.
Output level : as low as possible
FM SECTION
BAND : FM
FM RF signal
generator
0.01pF
| » telescopic
(oummeema
antenna
terminal
22.5 kHz frequency deviation by
400 Hz signal.
Output level : as low as possible VTVM
phones jack
* Repeat the procedures in each adjustment several times, and
the frequency coverage and tracking adjustments should be
finally done by the trimmer capacitors.

Sony CFS-B31 Specifications

General

Brand	Sony
Model	CFS-B31
Category	Cassette Player
Language	English