Up in smoke...

PhaseShift · 3rd September 2002, 03:00 PM

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

BeanZ · 3rd September 2002, 05:33 PM

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

Narcisse91 · 3rd September 2002, 06:03 PM

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?

3rd September 2002, 03:00 PM	#1
PhaseShift diyAudio Member Join Date: Jun 2002 Location: Illinois	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

3rd September 2002, 05:33 PM	#2
BeanZ diyAudio Member Join Date: May 2002 Location: Cincinnati, OH now Columbus,OH USA	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 __________________ BeanZ

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Zen V4 smoke....	rebojorge	Pass Labs	8	20th December 2007 09:34 PM
Newcastle R-956: Where there's smoke...	JimLish	Solid State	6	7th November 2006 02:39 AM
T-amp up in smoke	jwb009	Class D	21	4th April 2006 07:50 AM
I let the smoke out.	TerryG	Class D	16	8th November 2005 07:25 PM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)