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-   -   Ampeg BA115 keeps blowing fuses (http://www.diyaudio.com/forums/solid-state/174329-ampeg-ba115-keeps-blowing-fuses.html)

Rotus623 26th September 2010 07:38 PM

Ampeg BA115 keeps blowing fuses
 
Has anyone on here ever worked on one of these amps? Problem is that I can't get any voltage readings anywhere because when I cut the amp on it keep blowing fuses. Any input is much appreciated!!

stratus46 26th September 2010 09:06 PM

Quote:

Originally Posted by Rotus623 (Post 2315054)
Has anyone on here ever worked on one of these amps? Problem is that I can't get any voltage readings anywhere because when I cut the amp on it keep blowing fuses. Any input is much appreciated!!

Blown (shorted) output transistors. With an Ohm meter (power OFF) these will read something very close to 0. Drivers can be damaged too so don't just drop in a new pair of outputs and fire it up.

Less likely it could have blown the bridge rectifier instead of OR in addition to. Bridges are more likely to fail _after_ the power transistors because some yahoo installs a 15 amp fuse and blows out some more parts.

G

Rotus623 26th September 2010 11:02 PM

Cool man. I'll check it out.


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