Table of Contents
Advertisement
dated
sntesisie
Anca
inet
JL-F50
8. Troubleshooting
8-(1) Table of Troubleshooting
Platter does not rotate when
tonearm is moved to manually
or by automatic start opera-
tion.
1. Motor is not powered.
* Check if the power cord is plugged in
and the fuse is blown when the neon
lamp also does not light.
*
Check the transistors in the power
circuit.
(Check if 18V is availabie
at the motor terminals.)
*
Check voltage of each part of the servo
circuit board.
*
Adjust the switch lever for correct
clearance.
2. Motor and motor circuit are
defective.
3. Switch lever remains in contact
with the switch.
1. The circuit board is out of fine
adjustment.
Platter speed is not correct.
*
Adjust so that it rotates correctly for
both 33 or 45 rpm.
Motor rotates at a high speed
without being controlled by
the servo system.
1. The printed pattern is short-
circuited.
(Capacitors, particularly C5
should be checked carefully.
*
Separate the short-circuited points.
Motor rotates unbalancedly.
1. Platter is not correctly fitted on
the shaft.
2. Any one of transistors X1-X8 is
defective.
*
Fit the platter on the motor shaft
correctly.
*
Check voltage for X1-X8.
1. Either one of the Hali elements
is defective.
2. Input or output of the Hall
elements is incompletely soldered.
Platter stops at a point when
held by hand.
(Dead point occurs.)
*
Replace
*
Solder it completely.
Tonearm does not lead-in.
(Player does not start.)
1. Platter does not rotate.
2. Change cycle does not start.
Refer to the above-mentioned column.
*
Check that the engagement shoe oper-
ates smoothly, and that it is pushed
away fully when the start knob ts pulled.
*
Set lead-in lever to the proper inward
position.
sister
Ba
a not
Bila
RL,
3. Lead-in lever on driving gear is
turned toward the outside of the
gear and is blocked by the arm
lever stud.
Tonearm lead-in position goes
1. Arm lever adjuster is not firmly
*
Be sure to tighten the Knurled washer
out of adjustment.
fixed, allowing movement.
to lock the adjuster.
Arm lifter lever moves incor-
1. The lead wires of the tonearm
*
Slacken the lead wires to avoid any un-
rectly.
are too tight or tangled.
wanted force on the tonearm pivot.
2. Elevator slips on the tonearm
*
Wipe the elevator face.
pipe.
Tonearm does not stop at the
1.
correct position of a record,
and moves to the inside.
Index lever does not operate
correctly.
*
Check that the index lever operates
smoothly under the action of the
spring.
*
Check that trip lever returns after com-
pleting the change cycle, and that the
engagement shoe moves smoothly and
freely with its own weight.
SS
i i a
at
A lS
S
AIS BER
AN SA
O RG
Change cycle will not stop.
1. Trip lever and engagement shoe
of the main gear malfunction.
No sound is reproduced while
playing.
1. Cartridge is defective.
2. Wiring is not correct.
(Live and
earth are connected inversely.)
3. Stylus is defective.
4. Amplifier is defective.
*
Replace.
*
Check the wiring.
*
Replace.
Advertisement
Table of Contents
