Aiwa AX7600 Tuner Amp - Noise on Phono Left Channel

[Ingers_1973]

Hi Everyone, new member here.

I have an original Aiwa AX-7600 Tuner Amp. It's been working fine until recently. Now I have a really noisy left Phono Channel. The noise level rises and falls with the volume. Every other channel, including the right Phono Channel is fine. Even if I unplug the turntable plugged into the phono, the noise is still there. Yesterday I opened the unit up to check for any signs of physical issues but couldn't see any. I also re-soldered most of the joints on the Jack/Equaliser board. The problem is still there.

Any help would be greatly appreciated!

 

[BoomboxLover48]

Power up relays go bad and that might also cause noisy channel.
Try cleaning the phono/tuner switch and the main power switch with Deoxit FaderLube 5
Check phono ground cable and see if it is connected well.

 

[hopey]

It could be feedback loop it happens when the insulation of the internal cables deteriorates over time. You can test by wiggling the cables and see if the sound fluctuates.