Aiwa ?? Rotary pot problems ?

[TA7205]

Hi;

I've got a Aiwa AV-D30U (stereo reciever) with a psycho volume control.

The display indicates the the volume is increasing as you advance the knob,
when it reaches 4 or 5, and you keep advancing, the volume then starts
to decrease. I first cleaned the rotary pot, resoldered the connections still,
no difference. Funny thing, another Aiwa CD combo has just come in with
the same problem.!!
I hope it's not a upc problem, that will kill this job and that one too.
Is the rotary pot bad ? Has anyone seen this before ??

Thanks in advance,
Rick

 

[Lew]

I have seen some of those where the Volume control must be replaced. They
simply wear out.
Lew

 

[Mark D. Zacharias]

I've seen the pots be scratchy, but if the volume consistently drops as you
increase to a certain point, I'd suspect the electronic volume control IC.
These days, though, the volume controls are sometimes buried in larger
DSP-type chips.

Mark Z.



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"TA7205" <ta7205@aol.com> wrote in message
news:20031121201338.29142.00000734@mb-m12.aol.com...

Hi;

I've got a Aiwa AV-D30U (stereo reciever) with a psycho volume control.

The display indicates the the volume is increasing as you advance the
knob,
when it reaches 4 or 5, and you keep advancing, the volume then starts
to decrease. I first cleaned the rotary pot, resoldered the connections
still,
no difference. Funny thing, another Aiwa CD combo has just come in with
the same problem.!!
I hope it's not a upc problem, that will kill this job and that one too.
Is the rotary pot bad ? Has anyone seen this before ??

Thanks in advance,
Rick