Akai AP-005

Vill. TROUBLE SHOOTING CHART
Condition Explanation Confirmation Source
Countermeasure
Poor tone 1. Distortion 1. Distortion persists after changing Faulty cartridge.
quality. (When using new stylus and confirming normal
record) pick-up arm operation.
(Amp. Speaker normal)
Replace cartridge.
. Crackling sound even when play-
ing new record. Especially vague
at high range.
Worn stylus.
Replace stylus.
. A crunching sound exists and
there is a sudden change in sound
level. Also the level of right and
left differs greatly.
Bent stylus.
Replace stylus.
. Sound is vague or distortion
exists.
Dust adhering to stylus.
Clean stylus.
. Stylus jumps.
body during record playback.
2. Hum noise
. When pick up arm or player body Faulty grounding
is touched with your hand, hum
noise increases.
and amp.
. A hum is emitted from one
channel (or both channels). tion.
Insufficient pressure.
. Stylus sinks too far into cartridge Too much pressure.
Readjust stylus pressure.
between cartridge and
amp. in-put or turntable
Faulty pin plug connec-
Replace or repair ground
wire.
Connect correctly.
close together.
3. Left/right Using a monaural record, left/right
poor. from the center.
(Perfect Amp/Speaker connections)
cartridge.
4. Distortion at
one channel only.
1. Observe pick-up arm head during
record performance.
f 3. Hum is altered by changing posi- Lead wire from pick-up
tion of lead wire from pick-up. and source wiring is too
The plus and minus
sound separation | sound scatters and is not emitted terminals are reversed on
one side at cartridge
output pin and shell pin
connection or faulty
Bent pick-up head.
Move lead wire to obtain
minimum hum.
Connect plus and minus
correctly.
Replace cartridge.
Replace pick-up arm.
2. After pick-up arm side pressure
and zero balance adjustment, shaft faulty.
pick-up arm does not move
smoothly by means of inside force
canceller.
Pick-up arm rotating
Replace pick-up arm
assembly.
hand.
3. Pick-up arm heavy or catches Installation of pick-up
when moved to left and right by plate assembly faulty.
Correct pick-up
plate installation
height as specified.
Replace pin plug cord.
Replace muting switch.
Adjust installation
position.
Replace cartridge.
5. No sound. 1. Check pin plug cord lead-through Disconnected or broken
with tester. wire.
2. Check muting switch lead-through | Shorted.
with tester and installation Installation position
position. faulty.
3. Check cartridge terminal DC Broken wire inside
resistance with tester. (L ch, R ch) | cartridge or shorted.
Unusual noise 1. Mechanical 1. Metal is rubbing against in rotating | Insufficient oil or grease.
noise. part of automatic mechanism. Catches on something
(direct noise) irregular.
2. Belt contacting belt guide.
height.
Faulty motor pulley
Clean and lubricate
rotating part.
Adjust height of motor
pulley.
3. During revolution vibration exists
or noise is audible.
Faulty main motor.
Replace main motor.
4. During motor rotation, if arm or
table mount is touched with your
hand, vibration is evident.
motor cushions.
Faulty installation of
motor or variation in
Adjust motor installation
position. :
Replace motor cushions.
5. Observe motor pulley during
revolutions.
pulley.
Variation in motor
Replace motor pulley.
14