Magnum 1a125 amp , dc on speaker outputs

iantubefreak

Honorable
Jan 22, 2013
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10,510
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Hello,
i have just got hold of a magnum audio ia125 amp . on power up there is a lot of hum that dies down to a whisper . nothing else comes through the speakers even on full volume with the mc input selected (no hiss) there is around 48 volts dc on the left channel and nothing at all on the right . also the power on led on the front panel does not light up . i am thinking that the output transistors have failed but i am no pro but pointed in the the right direction i would be able to carry out the repair myself i would be very greatfull for any help. cheers, ian
 
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