AIWA CX-NDST717

[Kerry]

Hi,

The above unit, when plugged in, will begin to cycle the tape decks
non-stop. By opening the tape doors (sometimes) you
can get it to stop. Also at times pushing a CD button may stop it. A
that point the unit will function in most modes, however
if you try to use the mulit-function knob the unit will start cycling
both tape drives. While the unit does this, you can not
change any function and it is unresponsive to any button push except
the power button which will turn off the display but
NOT the power supply. At times the unit will cycle the CD deck instead
of the tape drives, however that doesn't happen
often. Also once in a while, when the problem is there the unit may
open the CD drawer by itself.

All voltages and logic levels appear normal including reset and
hold. Osc level at the micro look good. All DC levels
show no evidence of any noise and are "flat". One would think the
problem should be related to the tape decks
(IE: cam switches etc) except for the fact that when the unit is ok,
the decks function normally and activating the
multi-function knob causes the problem to reappear.

It appears as if the micro gets "busy" doing something or waiting for
some response and seems to hang.

So far we have replaced the micro.

Any help greatly appreciated.

Kerry

 

[Mark D. Zacharias]

One of the cassette belts is slipping. Rotate the flywheels through to stop
it. To fix the problem, replace the belts. Most Aiwa models use a 9.5 and
10.7 inch belts, both about .047 cross-section.


Mark Z.


"Kerry" <deaconone@teleweb.net> wrote in message
news:da9ce87d.0308140518.52ed896@posting.google.com...

Hi,

The above unit, when plugged in, will begin to cycle the tape decks
non-stop. By opening the tape doors (sometimes) you
can get it to stop. Also at times pushing a CD button may stop it. A
that point the unit will function in most modes, however
if you try to use the mulit-function knob the unit will start cycling
both tape drives. While the unit does this, you can not
change any function and it is unresponsive to any button push except
the power button which will turn off the display but
NOT the power supply. At times the unit will cycle the CD deck instead
of the tape drives, however that doesn't happen
often. Also once in a while, when the problem is there the unit may
open the CD drawer by itself.

All voltages and logic levels appear normal including reset and
hold. Osc level at the micro look good. All DC levels
show no evidence of any noise and are "flat". One would think the
problem should be related to the tape decks
(IE: cam switches etc) except for the fact that when the unit is ok,
the decks function normally and activating the
multi-function knob causes the problem to reappear.

It appears as if the micro gets "busy" doing something or waiting for
some response and seems to hang.

So far we have replaced the micro.

Any help greatly appreciated.

Kerry