Pioneer SA-6300

[Carlosraj]

Hi

I am having a problem with this Pioneer SA-6300 amp. The amp works OK, but when I turn the bass control knob, this happens:-
Firstly, there is a burring sound (hum) when I turn the knob.
Secondly, the volume goes down, gets softer.
Lastly, the power indicator light dims when I turn the knob.

I have checked the power filter caps and they seem OK and also resoldered the board. Can the power transformer cause this problem. Pls advice

Thanks

Carlosraj

 

[JonSnell Electronic]

Sounds like a leaky coupling capacitor putting DC across your loudspeaker.

 

[Carlosraj]

Sounds like a leaky coupling capacitor putting DC across your loudspeaker.

Thanks. it was aleaky capacitor problem. Its OK now.

Carlos