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Old 10th April 2011, 07:05 AM   #1
diyAudio Member
Join Date: Apr 2011
Default MRP-T130

My cousin tried fixing and amp like this. He said he changed a couple of mosfets but it didn't solve the problem. Then he gave me the amp so I decided to take a stab at it. I was hoping someone had the schematic, parts list or picture of the circuit board so that I can confirm he installed the correct mosfets. Any help would be greatly appreciated.
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Old 10th April 2011, 09:45 AM   #2
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Join Date: Nov 2003
Location: Louisiana
What does the amp do when you power it up?
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Old 10th April 2011, 07:07 PM   #3
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Join Date: Apr 2011
I wasn't there when he powered it up and its been a couple of years since he attempted this repair so he doesn't remember. I only know that he change two of the fets. I wanted to confirm they were correct before I powered it up and possibly did more damage. The two fets I'm talking about are N2D F10P20F & N2D F10P20FR.
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Old 10th April 2011, 07:14 PM   #4
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Join Date: Nov 2003
Location: Louisiana
Those aren't FETs, they're rectifiers.

If you insert a 10 amp fuse in the B+ line and have all semiconductors tightly clamped to the heatsink, you shouldn't do any more damage (assuming that the rectifiers are installed in the correct locations - the board should be marked).
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