SPX pro audio amp No audio output

[neonarossa]

I have +-15v on ICs 1-5
100hz Signal in & out ICs 1-4
No signal in or out IC 5
Rail voltage +29.44v /-29.46
Checked all drivers?

 

[Perry Babin]

Have you operated all switches and pots through their entire range while listening for output to see if audio ever played through?

 

[neonarossa]

Yes. Although the low/full/high switch is stuck in the middle.
I checked for signal on the pins under the board. Signal was present.

 

[neonarossa]

Amp is fixed!! I removed the xover switch. Took apart and cleaned the corroded contacts and installed. Thanks again..