[Chieftain of the Carpet Crawlers]

On Tue, 19 Mar 2013 16:52:57 +0000, sweetnsoursauce
wrote:


Hi

My Pioneer A-107 Amp suddenly developed couple of issues and wondering
if there is an explanation and/or fix for the following:

1. when turning on the amp (which is connected only to a turntable) loud
rumble/noise comes out of the speakers

2. the phono, cd tuner lights all flash are blinking at same time

Is it the end of my amp finally?

Any help or advice would be be most welcome.

You have a ground loop set up causing a feedback hum.

something is not plugged in all the way, or something that was not
plugged all the way in, is now.

A ground loop can be caused by attaching a ground as well as by
detaching one.

A ground lead from your stereo to your turntable chassis may stop it.
If it does not, then you need to 'free' a ground which is attached on
both ends of a cable, at one end.

Your "RCA" connectors can get oxidized on the outside. These are the
jacks you plug into with your turntable leads. They either need to be
better attached, or 'less' attached.

I know it is confusing, but a loop can be created by making a ground
connection which should not be there, as well as by not making one that
should be in place.

If you recently hooked the turntable up, you should re-check those
connections carefully.