cec BD-5200 - Troubleshooting; Tone Arm Fails to Auto Return; Tone Arm Returns Late; Tone Arm Returns Early

a
if
TROUBLE SHOOTING
1. The tone arm will not automatically return.
Remove
the
turntable
platter
and
check
to
see
that
the
clearance
between
gear
of
center
shaft
and
ratchet
is
reasonable.
(Fig.
15)
No:
Yes:
Loosen three screws which fasten the center shaft, and adjust.
Rotate
adjusting
screw(Fig.
16)
of
tone
arm
fixing
plate
counter-clockwise.
2.
The
tone
arm
returns
some
seconds
after
the
end
of
the
performance.
Rotate adjusting screw
(Fig. 16) of tone arm fixing plate counter-clockwise.
3. The tone arm returns before the end of the performance.
Rotate adjusting screw (Fig.16)of tone arm fixing plate clockwise.
4.
The
turntable
platter
will
not
rotate
even
though
the
tone
arm
is
above
the
disc.
Check to see that the strobo light is ON.
Yes: Check to see that the belt
is in place on the pulley.
No: Check to see that the power |
© ‘Yes: Check the fuse. No:
Yes: Check to see that the
motor is rotating.——|_
No: Fit the belt.
plug is securely connected.
No: Connect the plug.
5. The turntable platter will not stop rotating.
Check
to
see
if
the
turntable
will
stop
rotating
when
knob
of
microswitch
is
sufficiently
pushed.
oe
Adjust
the
clearance
between
the
knob
of
microswitch
and
tip
of
tone
arm
fixing
plate
to
1
mm.
(Fig.
16)
No: Check the wiring.
No:
Yes:
No:
Yes:
Replace wiring according to the circuit diagram.
Check the microswitch.
Microswitch defective.
Capacitor defective.
6.
Adjustment
of
turntable
speed
cannot
be
made.
+
Strobo
indexes
appear
not
to
stand
still.
Readjust
semi-fixed
variable
resistors
referring
to
TURNTABLE
SPEED
of
ADJUSTMENTS.
\
+
No
speed
adjustments
with
variable
resistor
knob.
Check
the
wirings
including
the
motor
servo
control
circuit.
No:
Yes:
No:
Yes:
No:
Yes:
7. Noise from turntable.
Replace wiring according to the wiring diagrams.
Check the variable resister.
Variable resister defective.
Check the rotaly switch.
Rotaly switch defective.
Motor defective.
Check for noise with turntable platter removed.
Yes:
No:
Check motor.
Yes:
No:
Check
if
turntable
platter
touches
the
other
parts.
Adjust the height of turntable platter.
Turntable shaft is defective.
Yes: Check the turntable bearing.
Check to see that 10+1V is
available from the secondary
of the transformer.
No:
Ok: Check the microswitch.
: Replace the fuse.
@6
: Replace the microswitch,
: Transformer defective.
: Check the leads from the AC
: Motor defective.
: Check to see that proper voltage
is available at the primary of the
transformer.
circuit board to the primary
of the transformer.