Akai AP-005

Condition
Explanation
Confirmation
Source
Countermeasure
2.
Electrical
1.
Sometimes
shock
noise
and
hum
Faulty
pin
plug
cord
Re-connect.
noise.
is
emitted.
connection.
Replace
or
repair
lead
(from
speaker)
Lead
wire
leak
or
wire.
2. When lead wire is moved, sound
is cut or noise is audible.
3. Interference when upper part of
shell is lightly tapped.
immediately prior to and immedi-
ately following record
performance.
4. A rough scratching noise is emitted
<1
lead wire broken.
Defective cartridge.
Faulty cartridge
terminal connection.
Replace cartridge.
Make proper lead wire
connection.
Faulty muting switch
contact.
Al
Replace muting switch.
Clean contact point.
5. Vibration and noise from motor,
during revolutions.
Replace main motor.
Turntable does
not rotate.
(or rotation is
unstable)
1. Electrical
circuit problem. .
2. Table shaft
out of order.
1. Check Supply P.C Board fuse
with tester.
Faulty main motor.
Fuse blown.
Replace with proper fuse.
(1A)
2. Check leaf-switch lead-through
with tester.
|
Faulty contact points.
Replace leaf-switch.
3. Check various parts of Supply
P.C Board with tester.
Faulty parts.
4. Check main lead wires with tester.
5. Check motor coils with tester.
1. When rotor is rotated by hand, it
catches or rotation is not light
and smooth.
2. When turntable in rotated by
hand it seems heavy. Unusual
noise and too much rattle
(with belt removed).
2. Belt rubbing noise.
4. Revolutions Check for variation in shape of belt
too slow.
(or uneven)
and whether dust is adhering to belt,
— Replace faulty parts
Disconnected or broken
lead wire.
Replace or repair lead
wire.
Broken coil.
Insufficient oil
(rotor shaft).
Table shaft, bearing
defective or insufficient
oil (table shaft and
bearing)
Faulty motor pulley
height.
Variation of belt.
Dust.
Automatic
mechanism does
not function.
1. Does not lead-
in. (Check arm
test clamp to see
whether it has
come off.)
motor pulley and turntable.
1. Check Supply P.C Board fuse with
| Fuse blown.
Replace motor.
Clean and lubricate
Replace table shaft and
bearing. Lubricate table
shaft and bearing.
3.
Speed
change
|
1.
Slippage
between
belt,
motor
Oil
adhering
to
belt.
Replace
belt.
mechanism
pulley
and
turntable.
Worn
out
belt
Clean
with
carbon
tetrachloride or alcohol.
Adjust motor pulley
height and motor slant.
Replace belt.
Clean with carbon
tetrachloride or alcohol.
Replace fuse (1A)
tester.
| 2. Check leaf-switch lead-through
with tester.
ke
Replace leaf-switch.
3. Vibration occurs when low speed
motor is touched with your hand,
but does not rotate.
4. Check low speed motor lead-
through with tester.
Faulty motor.
Broken wire or short.
Faulty contact points.
[Replace low speed motor.
(Timing motor)
5. Low speed motor rotates, but
Action-Cam does not move at all.
Action-Cam installation
screws loose.
Tighten installation
screws.
6. Low speed motor and Action-Cam
vibrate.
7. Turn-Plate rotation is not smooth
and rotation is not exactly 90°
each time.
8. The lifter is very high and pick-
up arm does not ride on the arm
Test.
Variation in shape or
Crank-Lever.
Replace or repair
Crank-Lever.
off or lost it’s strength.
Tortion-Spring has come
Re-install or replace
Torsion-Spring.
Faulty lifter height.
9. Manual lifter knob can be brought
DOWN, but stylus does not lower.
Pick-up arm displays horizontal
motion only.
Faulty manual lifter.
Adjust lifter height.
Replace hand lifter
assernbly.
15