stevem Messages: 4733 Registered: June 2004 Location: NY
Senior Member
I believe your reading the schematic wrong as + 34 volts on the red wires is the power supply rail.
If you are seing 34 volts positive on the speaker jack then you have one or more output transistors or driver transistors bad in the positive side of the output stage.
The normal D.C. Voltage seen on the speaker jack 2 seconds after turn on should be less then .045 volts D.C. .
Also if you are seing that level of D.C. Voltage on the speaker jack do not plug in a speaker as 34 volts is = to over 140 watts and you will likely blow the stock speaker (s)!