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Old 8th April 2015, 12:07 AM   #1
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Exclamation Memphis 16-MCD1000

Hey Perry I am working on another Memphis MCD1000 I cant seem to figure it out I thought I would see if I could get your input

With one side of the output fets pulled out if I power the amp up the power and protect flash back and forth also the other side of output fets start getting hot and I get some sort of chirp sound

If I remove the PWM board near the rca jacks the amp powers up fine

also I am using a known working PS driver board
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Old 8th April 2015, 12:19 AM   #2
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If I pull the audio board on the output fet side that is getting hot the amp powers up normally without getting hot

the reason I pulled the other output fet side was because they were reading .014 v on the meter and they still read near that when removed
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Old 8th April 2015, 02:11 AM   #3
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Never mind Perry sorry come to find out someone had installed mcd500 version PWM card in this amp no wonder why it was not syncing up which caused burned up PS fets and output fets because all they were doing was heating up
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Old 9th April 2015, 08:58 PM   #4
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Hey Perry nother question for you I thought I would see what your thoughts are here so I ended up replacing all new PS mosfets 3205 Irf9640 and Irf640s all have been replaced the amp powers up fine and audio appears to be working as well

My issue is if I disconnect the +/- and remote within seconds and power the amp back up it seems like the transformer makes a loud buzzing sound like it is straining power if I leave it running like that for about 30 seconds I notice the PS fets start getting hot as well

if I disconnect the amp wait a minute reconnect it works fine this wouldn't have anything to do with the waveform ringing in the transformer you was referring to like in the MC1.4000 I am working on would it otherwise the only thing I could think of is a resistor is slightly off

Last edited by Exbass17; 9th April 2015 at 09:00 PM.
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Old 10th April 2015, 01:04 AM   #5
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What if you just remove and replace the remote?
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Old 10th April 2015, 01:19 AM   #6
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I havnt tried I am assuming it will do the same thing ill give it a shot that's what I am affriad of it does it and it is installed in a car no one will hear that then there goes the PS fets smoked
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Old 10th April 2015, 01:31 AM   #7
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Weird doesn't act up that way I assume it would have Thanks Perry
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