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Old 30th April 2013, 04:15 PM   #1
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Default Alesis RA300 Short

I have an Alesis RA300 with a short. The output drops in/out. I am a total noob and have no idea how to investigate the problem but I'd like to take a stab at fixing it myself. Any advices where to start with diagnosing the problem? I have done some soldering of guitar pickups and cables but this is totally new to me.
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Old 30th April 2013, 05:21 PM   #2
WSJ is offline WSJ  United States
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One amp may have DC at the output. To find the bad amp, measure the DC at the output inductor. The output inductor is an easy way to access each amp before the output relay. I have repaired several Alesis amps, PS filter caps have been bad on many units.

You can find the service manual on line.
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Old 30th April 2013, 07:17 PM   #3
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Quote:
Originally Posted by WSJ View Post
One amp may have DC at the output. To find the bad amp, measure the DC at the output inductor. The output inductor is an easy way to access each amp before the output relay. I have repaired several Alesis amps, PS filter caps have been bad on many units.

You can find the service manual on line.
Thanks for the info. Completely over my head (), but I'll look for that manual on line and see if things fall into place. Cheers.
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Old 1st May 2013, 06:26 AM   #4
vali1 is offline vali1  Romania
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Service manual RA 300 in attachaments...
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File Type: pdf Alesis RA300.pdf (679.6 KB, 48 views)
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