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= TROUBLE SHOOTING GUIDE
*
Except when check ing voltage, disconnect the power cord before repair without fail.
A.
Switching on does not cause
1. Come off belt from capstan
TROUBLE
Turntable speed
Instali the belt to capstan.
turntable to rotate.
(Remove bottom cover and, using DC
voltmeter, check printed base voltage)
No output of constant-voitage circuit
(1)
No output on secondary of transformer.
*
Cord disconnected.
*
Replace cord.
Soldered improperly.
Solder securely.
Power transformer defective.
Replace power transformer.
Output of cnstant-voltage circuit is
96~14.4V.
Motor ass'y defective.
Replace motor ass'y:
Speed selector switch defective
*
Contact faulty.
*
Replace speed selector switch.
Soldered improperly.
Solder securely.
B.
Turntable speed too slow.
Constant-voltage output is not 9.6V ~
14.4V.
Power transformer defective.
Replace power trans.
2.
Constant voitage output is 9.6V ~
14.4V.
*
Motor ass'y defective.
*
Replace motor ass'y.
Adjust semi-fixed resistor VR3 & VR4.
Speed unadjusted.
C.
Turntable speed too fast.
1.
Constant-voltage output is not 9.6 ~
14.4V,
Power transformer defective.
Replace power transformer.
2.
Constant-voltage output is 9.6V ~
14.4V.
Motor ass'y defective.
Replace motor ass'y.
Speed unadjusted.
Adjust semi-fixed resistor VR3 & VR4.
roe
fj
D. Turntable speed varies too much.
*
Motor ass'y defective.
*
Replace motor ass'y.
*
Replace belt.
*
Belt defective.
ceeerees
Turntable. after stopped by hand.
*
Motor ass'y defective.
*
Replace motor ass'y.
will not tusn or starts turning but
will stop soon.
Operative at only one of two
*
Speed selector switch defective.
*
Replace speed selector switch.
speeds.
*
Leadwire disconnected or unsoldered.
*
Replace leadwire, or solder securely.
(33-1/3 r.p.m or 45 r.p.m)
*
Contact of VR1, VR2 insufficient.
*
Replace printed base ass'y.
G.
When
actuating, turntable speed
zi *
Motor ass'y defective.
*
Replace motor ass'y.
is unsteadly for along time.
Noise
Power transformer makes loud noise
Replace power transformer.
Offensive noise is hears.
of vibration.
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