Marantz 4430 no sound

[pontiacpete]

Sorry this isn't a music instrument electronics issue but would anyone help with this?

This unit came to me with the compliant that there was no sound.
I plugged it in and turn on the radio and there is sound, FM and AM
I then plug in an Ipod to check Aux and there is no sound. Change it back to FM and no sound.
When turning the unit on the click of the relay can be heard, but still no sound on any functions.
The +/- 35 vdc is present on filter caps. Cleaned pots so far but that's it.
Found a schematic of the power amp off of another thread
Do any of you have suggestions on where to go from here?

Thanks
pete

[52 Bill]

Cleaned pots so far but that's it.

On older receivers a very common source of this problem is a dirty selector switch or a dirty tape monitor switch. Try some DeoxIt on the switches.

[pontiacpete]

Thanks 52Bill for pointing me in that direction. Cleaned and worked all the selector switches and button switches and it came back on.
Not sure which one did it but it took a fair amount of working the switches.
Thanks, enjoy the holiday!!!