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Old 7th February 2012, 03:20 AM   #1
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Default Rockford Fosgate Power 351M

When i removed the bottom cover i noticed D1 was unsolderd from the board..

I soldered it back down ..

All outputs, source resistors, and rca shields test fine..


When i power it up it idles perfectly..

I get 0.00 volts across the speaker output terminals

When i connect a speaker to it the amp starts drawing excessive current and the speaker flutters ..

Any ideas where to begin looking?
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Old 7th February 2012, 03:36 AM   #2
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Have you checked the RCA ground pins to the board to see if they are broken?

D1 will probably need replacing it is the IN4003 correct?
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Old 7th February 2012, 03:40 AM   #3
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D1 was ok..

I found the problem D7 was defective...
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Old 7th February 2012, 03:44 AM   #4
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I have had D7 fail before on many amps and the speaker flutters and the amp produced alot of feedback. I usually relace D1 and D7 just for good measure.

Alot of times D7 tends to fail after the ground pins on the RCA plugs has been broken. Maybe just a coincidence not sure.
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