Panasonic Technics SL-1360-(ES)

TROUBLE
SHOOTING
GUIDE
* Except when checking voltage, disconnect the Power cord before repair without fail.
TROUBLE CAUSE |
-
Turntable Speed Remove back cover and, using DC volt-
A. Switching on does not cause meter, check printed base voltage:
turntable to rotate. 1. No output of constant-voltage circuit
(between Tr1 collector and 4) is found.
(1) No output on secondary of transformer.
* Cord disconnected.
* Soldered improperly.
Fuse disconnected.
* Power transformer defective.
(2) Output found on secondary of trans-
former.
* Constant-voltage circuit parts (ZD1),
Tr1, Tr2) defective.
2. Output of constant-voltage circuit is
17~20V.
* 3-phase switching circuit (Tr4 ~Tr9),
oscillator circuit (Tr3) defective.
Tr14 defective.
Power Switch is not ON.
Micro switch defective.
Speed selector switch defective.
Contact faulty
Soldered imProperly.
REMEDY
Replace cord.
Solder securely.
Replace fuse.
Replace power transformer.
x * * *
* Replace printed base assembly.
* Replace printed base assembly.
Replace micro switch.
* Replace speed selector switch.
* Solder securely.
* * * GW
B. Turntable speed too fast. 1. Constant-voltage output is not 17~20V.
* Constant-voltage circuit parts (ZD1, Replace printed base assembly.
Tr1, Tr2) defective.
2. Constant-voltage output is 17V~20V.
* Diodes D8, DY, ZD2 defective. Replace printed base assembly.
* Diodes D5, D6, D7 shorted. Replace motor. (Stater frame Ass’y).
*
Speed maladjusted. Adjust semi-fixed resistor VR1 & VR2.
. Constant-voltage output is not 17~20V.
* Constant-voltage parts (ZD1, Tr1, Tr2,
defective.)
2. Constant-voltage output is 17~20V.
* Diodes D8, D9, ZD2 defective.
Speed unadjusted.
. Turntable speed too slow.
Replace printed base assembly.
Replace printed base assembly.
* Adjust semi-fixed resistor VR1 & VR2.
Trouble in 3-phase switching circuit. Replace printed base assembly.
. Turntable speed varies too much.
* 3-phase switching circuit defective. Replace printed base assembly.
. Turntable, after stopped by hand,
will not turn or starts turning but
will stop soon.
Replace selector switch.
Replace lead, or solder securely.
Replace printed base assembly.
Selector switch defective.
Lead disconnected or unsoldered.
* Contact of Vri, Vr2 insufficient.
. Operative at only one of two
speeds.
(33-1/3 rpm, 45 rom)
* Make it become 50mV at both ends
of C15 with semi-fixed resistor VR3.
* Make it become 2.2V at both ends
of R38 with semi-fixed resistor VR4.
* Semi-fixed resistor VR3 & VR4
unadjusted.
. When actuating, turntable speed
is unsteadly for along time.
* Power transformer makes loud noise Replace power transformer.
of vibration.
* Broken part of rotor magnet of iron
chips attracted by magnet and rubbed
by motor case.
Noise
Offensive noise is hears.
Remove iron chips.