Akai AP-002

Vit.
ADJUSTMENT CHART
CONDITION
Poor tone quality
24
1. Distortion (when
using a new quality
record)
Faulty cartridge
Distortion persists after changing needle
and confirming normal pick up arm opera-
tion.
(Amp speaker normal)
Worn needle
Crackling sound even when playing new
record,
Especially vague at high range
Stylus pressure inadequate
Needle sinks to far into cartridge body
during record playback
(too much pressure)
Sound completely distorted.
Needle jumps (insufficient pressure)
Bent Stylus
A crunching sound exists and the level of
tight and left differs greatly. Also loss in
directional sensitivity.
Sudden change in sound level
Bust adhering to stylus tip
Sound is vague or distortion exists
EXPLANATION SOURCE AND SYMPTOM COUNTERMEASURE
Replace cartridge
Replace needle.
Readjust stylus.
Pressure
Replace stylus.
Clean stylus tip.
9. Hum Noise
3. Left/Right sound
separation poor
Lead wire from pick up and power source
wiring is too close together
Hum is altered by changing position of
lead wire
Insufficiently grounded
When pick up arm or player body is touched
with your hand, hum noise increases.
No sound from side (or both channels) and
only a hum is emitted.
Faulty cartridge
Using a monaural record, left right sound
scatters and is not emitted from the center.
(Amp speaker connections are correct)
(Confirm that the plus & minus terminals are
not reversed on one side at cartridge output
pin and shell pin connection)
Check wire and correct.
Check amp input ground-
ing from cartridge.
Player and amp connection
Plug in pin plug cord per-
fectly.
Replace cartridge.
4. Distortion at one CH
only
Bent pick up head
Observe head during record performance.
Pick up arm rotating shaft faulty
Check pick up arm side pressure. At zero
balance arm does not move smoothly by
means of inside force canceller,
Faulty operation of AUTO-LEVER (9)
Is there sufficient loose play between
AUTO-LEVER (9) and PLATE-PU-ASSY
(10) connection part?
Are these parts bent?
Is steel ball (8) movement smooth?
Trip (5) function faulty
Is there sufficient loose play at TRIP and
CLUTCH ASSY (4) installation?
Are these parts bent?
Replace pick-up arm.
Replace pick-up arm.
Straighten or replace.
Straighten or replace.
5. Absolutely no sound
Pin plug cord is disconnected or solder has
come off of lead wire connection.
Confirm connections with tester
Shorted or wire inside cartridge
Check cartridge terminal DC resistance with
tester. (L-ch, R-ch)
Correct.
Repiace cartridge.