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Old 1st January 2013, 06:27 PM   #1
ivkata is offline ivkata  United States
diyAudio Member
Join Date: Dec 2010
Arrow autotek mm2000.1 so audio out relay sounds funny

happy new year everyone

im still buzzed from yesterday but I'm trying to fix an amp i just purchased for dirt cheap .the amp make and model is Autotek MM2000.1d that i purchased in a lot of blown amps from local installer .the unit powers on and idles fine and getting good power to the op amps but no audio out.I hear the relays click on power on but very faint .
When i turn the gain up
-with no audio signal connected everything looks good
-with audio signal connected and the gain turned up 1/4 way the relays buzzes to the beat

any thoughts ?
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Old 1st January 2013, 06:34 PM   #2
ivkata is offline ivkata  United States
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Join Date: Dec 2010
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Old 1st January 2013, 07:15 PM   #3
timwebb is offline timwebb  United States
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Join Date: Jan 2010
Location: memphis tn
u check the diode next to it?
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Old 1st January 2013, 07:37 PM   #4
diyAudio Member
Join Date: Nov 2003
Location: Louisiana
Are you sure that it's not one of the inductors buzzing?

Are you getting 12v across the relay coil (or the suppression diode)?

Does the audio remain clean on the filter inductor before the relay when you connect a load and try to drive a speaker?
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