Coustic 600SE In/out protect

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Working on this Coustic 600se, it keeps going in and out of protect.

There is -rail voltage on the speaker leads of the right and left. I measure the +/- 15 volt supplies and they appear to be coming up fine.

There are no apparent shorts in the TIP 35C/36C out puts and predrivers.

I know this is an odd amp design with alternating outputs. I used an external supply for the +/-15 volts, to power all the op amps. It has clean audio to the muting transistors. and there is no DC offset.

Any thoughts?
 
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