SUNN ALPHA 1x12 - Blowing Fuses! HELP!

[guitargeek.com]

Hello

I have a Sunn Alpha 1x12 that blows properly rated fuses as soon as i turn the amp on.

Any suggestions?

Thanks

Adam

[pintopower8]

stop putting fuses in it , something has obviously shorted if the fuse keeps going. get a continuity tester and check connection points, or take it somewhere to a proffesional. Try to think of any part of the machine that you were using wrong when the first fuse went, and check that area on the circuitboard for damage. look for burn spots or melted solder. or anything thats not connected right.

[Don T.]

Hello:
 Which fuse is blowing? The possibilities are:
1. bad rectifier
2. bad cap at the power switch (turn on pop eliminator)
3. bad filter caps
4. bad (shorted) output transistors
5. bad shunt diodes (connected between +- powersupply and output)
6. could also be a failed component on the power board like any transistor holding the outputs at full supply volts.

Use a brite light and magnifing glass. Look for any obvious burn marks or fried components. Use your nose. Bad filter caps will have an acrid smell and may have protruding gunk coming out where the leads go in.

[Bluesman]

Your outputs are fried. Replace them and the drivers as well. Check for burn rresistors on the output board as well.