MTX Thunder 275X

Adam248 · 10th July 2012, 05:16 PM

I've got a problem blowing fuses as soon as i add power.There is no signs of bad components or damage. Dose anyone know what it might be?

Perry Babin · 10th July 2012, 10:52 PM

Does the fuse blow with no remote voltage applied?

Adam248 · 11th July 2012, 01:12 AM

no,with the lead+ connected and as soon as i connect the ground- it pops the fuse...no remote wire yet

Perry Babin · 11th July 2012, 02:51 AM

What tests have you performed to determine that there are no defective components?

Adam248 · 22nd July 2012, 01:42 PM

i have checked the fets via diode tester to find one ir540 has shorted and seems to me a P60ne 06-16 power fet is shorted too .I have ordered a few ir540s ,have yet to order the p60ne 06-16 power fet .All diodes check good too ,should i replace all the fets together or just the ones ?

Perry Babin · 23rd July 2012, 12:04 AM

You should replace all of the FETs in the channel with the shorted FET. If the power supply FET has failed, you need to replace all of the power supply FETs.

10th July 2012, 05:16 PM	#1
Adam248 diyAudio Member Join Date: Jul 2012	MTX Thunder 275X I've got a problem blowing fuses as soon as i add power.There is no signs of bad components or damage. Dose anyone know what it might be?

10th July 2012, 10:52 PM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Does the fuse blow with no remote voltage applied? __________________ Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links

11th July 2012, 02:51 AM	#4
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	What tests have you performed to determine that there are no defective components? __________________ Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links

23rd July 2012, 12:04 AM	#6
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	You should replace all of the FETs in the channel with the shorted FET. If the power supply FET has failed, you need to replace all of the power supply FETs. __________________ Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links

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11th July 2012, 01:12 AM	#3
Adam248 diyAudio Member Join Date: Jul 2012	no,with the lead+ connected and as soon as i connect the ground- it pops the fuse...no remote wire yet

22nd July 2012, 01:42 PM	#5
Adam248 diyAudio Member Join Date: Jul 2012	i have checked the fets via diode tester to find one ir540 has shorted and seems to me a P60ne 06-16 power fet is shorted too .I have ordered a few ir540s ,have yet to order the p60ne 06-16 power fet .All diodes check good too ,should i replace all the fets together or just the ones ?

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