BUGERA 333 XL

SMPL · Post by **SMPL** » Mon Aug 19, 2013 8:21 pm

I loose the signal in this rig when it is switched to Lead/Overdrive. I checked the obvious fuses and tubes. I also checked to make sure all five relays were switching. The clean works great but need the Overdrive/Lead to work also.

I know this rig has likeness to the Peavey and is made by Behringer. I have the schematic but due to the hard to trace non tech friendly circuit boards I am having difficulty finding where the signal is lost.

Any thoughts would be appreciated!

Cheers,
SMPL

SMPL · Post by **SMPL** » Tue Aug 20, 2013 11:59 pm

I found the problem! A bad 1/4 watt. 100k dropping resistor R93 at V7. These rigs are not the most friendly to work on.
Cheers,
SMPL