Akai 4000DS

OPERATING PRECAUTIONS
The conditions listed below do not indicate mechanical
failure of the unit. If. your machine exhibits any of the
following, please check for trouble as indicated.
Loss of sensitivity or tone quality may be due to:
* - Wrong side of tape facing the heads.
* AC power voltage lower than the voltage to which your
machine is adjusted.
* Dust or magnetic particles adhering to the heads. See
head cleaning procedure. _
Magnetized heads. See head demagnetizing procedure.
Defective or worn tape.
Irregularity of tape transport may be due to:
* Dust or magnetic particles adhering to the heads and
other parts which the tape contacts. See head cleaning
procedure, i
* Dirty tape surface or oil adhering to capstan or pinch
wheel,
* Bent Take-Up Reel.
* Tape loaded improperly.
If your machine will not record or playback, check to see
that connections are correct and controls are properly
positioned.
The following conditions. are provided for your conveni-
ence.
* Your machine requires constant voltage for optimum
performance.
* If the sound sources are so far away from the
microphones that the recording level controls must’ be
turned up to maximum, some hum or noise will
inevitably be recorded. A test recording is recom-
mended before attempting a final recording.
Should there be a problem with your machine, write down
the model and serial numbers and all pertinent data
regarding warranty coverage as well as a clear description of
the existing problem and contact your nearest authorized
Akai Service Station or the Service Department of Akai
Company, Tokyo, Japan. -
HEAD CLEANING
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For quality performance, it is imperative that the heads be
kept clean at all times, Accumulation of dust and magnetic
particles on the heads results in poor head-to-tape contact
and deteriorates sound quality and sensitivity. It is,
therefore, recommended that the heads be cleaned every
time you use your machine, With a stiff cotton swab dipped
in Akai Cleaning fluid (Akai Head Cleaning Kit HC-500),
rub the entire head surface (do not scratch) until all tape
oxide and dust is removed. The capstan shaft, tape lifter,
pinch wheel and other parts ‘which the tape contacts
should also be cleaned.
* Alcohol can also be used for head cleaning. Do not use
chiorothane, etc. as such chemicals will damage the rubber parts.
[6]
PINCH WHEEL & CAPSTAN CLEANING
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If foreign matter is allowed ‘to accumulate on the pinch
wheel and capstan, these particles will come off on the
tape, causing deterioration of sound quality. Oil adhering to
the capstan also causes irregularity in tape transport. It is,
therefore, recommended that these parts be wiped clean
periodically.