here's the schematic.

I finally got around to installing the ic after powering up within seconds pin 4 fried. Pre amp board is disconnected it made no difference before so i did not reconnect. I was able to get correct schematic from peavey. I will post. Any suggestions would be appreciated.

I think that i found the problem pin 4 of the power amp ic that is bolted to the heat sink had broken where it comes out of the ic itself so was not clearly visible while in circuit. This morning i was checking to see if i could figure out if it was coming from the pre or power in the process i noticed if i put pressure on the board it would stop especially when pressing near the ic. So i removed the board and the heat sink and saw the broken pin.

Sorry about the delay did not get home till late yesterday. I also want to say my goof for not understanding your terminology before i posted. I checked the voltage and it is 15 on both sides. The schematic is not close enough to mine i have the 2nd version transtube model. Also the weird loud hum i described should jbe called motorboating i learned. I also chkd for any loose or broken solder joints and could not find any.

I'm  going through the amp and checking all of your suggestions and enjoying the comedy and artwork. Hopefully these will turn up tthe problem.

thanks for the schematic doc i will check tomorrow. mine is a usa made amp maybe its close enough to work.

peavey customer service is out for the holidays wont return until jan 2 will get schematic then and post.

I dont have the schematic i will contact peavy customer service. I will check the part you suggested and let you know what i find.

I have a peavy studio pro 112 transtube red stripe model. when the tdynamics control is turned to 50% it has a weird and loud oscillating hum there is also dc voltage at speaker wires. the voltage varies between 5 and 8 volts on my dmm. i was wanting some suggestions on where to start troubleshooting i would like to fix the amp myself. i got the amp cheap and thought it would be a great way to learn.