Peavey XR 696F - I made a booboo

[jondoe]

So when you do this is it with a dim bulb? Are the 40V and 90V rails symmetrical?

On your "bright bulb" voltages it looks like something is really pulling down the negative voltages. Can you measure the voltages across all of the 5w resistors (R105, R106, R126, R133, R136, R137, R178, R180)? Something is pulling current and those should show you where it is flowing.

yes dim bulb, with just J107/J202, high voltages observed were 112/49 on both channels. I'll have a poke around the resistors later on tonight and take some readings

[jondoe]

r136 0
r178 -11
r180 -11
r137 0

r106 22
r126 0
r133 0
r105 22

[jondoe]

I'm still waiting for some J111S replacements for the mute circuit (they were lost in the post), I've also found Q127 (MIXER ON/OFF MUTE) is shorted, that's a J111S also. I'm hoping the MMBFJ111 I've now reordered is a suitable replacement.