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Old 3rd September 2002, 03:00 PM   #1
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Default Up in smoke...

I am repairing my neighbor's girlfriend's car amp (MTX Thunder250D) and I need either a schematic or a cross reference part number. Whenever it is turned on two of the MOSFETS go up in smoke (connected in parallel). The parts are i think a TO-220 package and they have this written on it:



75339P
HO 27

The manufacturers logo is unrecognizeable because of the heat. Both FETs blew out the same leg. I called digi-key and all they could come up with is a Harrison MOSFET but they couldnt confirm an exact match. Thanks!

David
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Old 3rd September 2002, 05:33 PM   #2
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Are the MOSFETs in the output stage or in the power supply section? If they are in the power supply section, they others which are not blown should be the same, you could see about the exact number from there if it is too bad to read on the blown ones.

BeanZ
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Old 3rd September 2002, 06:03 PM   #3
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Default Re: Up in smoke...

Quote:
Originally posted by PhaseShift
Whenever it is turned on two of the MOSFETS go up in smoke (connected in parallel).

I'm trying to figure out what you mean by this. Do they smoke every time it's turned on? Or have you replaced them and smoked new ones?
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