Technics SL-23-X - Troubleshooting Guide

TROUBLE SHOOTING GUIDE
* Except when checking voltage, disconnect the power cord before repair without fail.
TROUBLE CAUSE
Turntable speed
A. Switching on does not cause 1. Come off belt from capstan
turntabie to rotate. (Remove bottom cover and, using DC
voltmeter, check printed base voltage)
2. No output of constant-voltage circuit
(1) No output on secondary of transformer.
*" Cord disconnected.
Soldered improperly.
Fuse disconnected.
Power transformer defective.
. Output of onstant-voltage circuit is
9.6~14.4V.
‘Motor ass y defective.
. Speed selector switch defective
Contact faulty.
Soldered improperly.
B. Turntable speed too slow. . Constant-voltage output is not 9.6V~
14.4V.
Power transformer defective.
. Constant voltage output is 9.6V~
14.4V.
Motor assy defective.
Speed unadjusted.
-C. Turntable speed tco fast. . Constant-voltage output is not 9.6V~
| 14.4V.
Power transformer defective.
. Constant-voltage output is 9.6V~
14.4V.
Motor ass’y defective.
Speed unadjusted.
D.
Turntable
speed
varies
too
much.
Motor
ass’y
defective.
Belt
defective.
E. Turntable, after stopped by hand. Motor ass’y defective.
will not tusn or starts turning but
will stop soon.
F.
Operative
at
only
one
of
two
Speed
selector
switch
defective.
speeds.
Leadwire
disconnected
or
unsoldered.
(33-1/3
r.p.m
or
45 r.p.m)
Contact
of
VR1,
VR2
insufficient.
G.
When
actuating,
turntable
speed
Motor
ass’‘y
defective.
is
unsteadly
for
a
long
time.
Noise
Power
transformer
makes
loud
noise
Offensive
noise
is
hears.
|
of
vibration.
fo) SL-23-(X)
REMEDY
Install the belt to capstan.
*
*
Replace cord.
Solider securely.
Replace fuse.
Replace power transformer.
Replace motor ass’y.
Replace speed selector switch.
Solder securely.
Replace power trans.
Repiace motor ass’y.
Adjust semi-fixed resistor VR1 & VR2.
Replace power transformer.
Replace motor ass’y.
Adjust semi-fixed resistor VR1 & VR2.
Replace motcr assy.
Replace belt.
Replace motor ass’y.
Replace speed selector switch.
Replace leadwire, cr solder securely.
Replace printed base ass’y.
Replace motor ass’y.
Replace power transformer.