Hifonics amp

mike49504 · 5th January 2011, 02:37 PM

Im repairing a hifonics amp which uses A1275 and C3228 drivers for the power supply Can i swap them out with Bd139 and Bd140? If so do they ace the same direction or do i have to flip them around?

Perry Babin · 5th January 2011, 02:40 PM

I commonly use those as drivers. The pin configuration is the same so you don't need to install them facing the opposite direction.

mike49504 · 5th January 2011, 02:52 PM

A1275=BD139?

Perry Babin · 5th January 2011, 03:10 PM

A = BD140

mike49504 · 5th January 2011, 03:28 PM

Reolaced the Orginal power supply fets (DFP70N06) with RFP70N06 replace gate resistors replaced the drivers. Outputs are out of the amp.

Amp still draws excessive current. Heres what i have for the gates

Perry Babin · 5th January 2011, 03:30 PM

If it's set to 2v/div, it's probably OK.

Have you tried pulling the rectifiers?

Precisely what is the model number?

mike49504 · 5th January 2011, 04:05 PM

Ill try pulling the rectifiers .

The amp is a Hifonics BXI 2008D

The scope was set at 10 us .5 volts div

807tubenut · 5th January 2011, 04:15 PM

I's it the black case/chrome end amp?

I'v got one of them on the shelf, could be rebuilt, but it's not really worth it, if you need that amp to help fix yours, let me know, I only have like $7 or $8 total in it.

mike49504 · 5th January 2011, 04:48 PM

Pulled the rectifiers amp powers up and idle's perfectly

Perry Babin · 5th January 2011, 04:59 PM

Are the rectifiers leaking or shorted?

Shorted rail caps?

Intermittently shorted transformer?

5th January 2011, 02:37 PM	#1
mike49504 diyAudio Member Join Date: Sep 2006	Hifonics amp Im repairing a hifonics amp which uses A1275 and C3228 drivers for the power supply Can i swap them out with Bd139 and Bd140? If so do they ace the same direction or do i have to flip them around?

5th January 2011, 02:40 PM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	I commonly use those as drivers. The pin configuration is the same so you don't need to install them facing the opposite direction. __________________ Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links

5th January 2011, 03:10 PM	#4
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	A = BD140 __________________ Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links

5th January 2011, 03:30 PM	#6
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	If it's set to 2v/div, it's probably OK. Have you tried pulling the rectifiers? Precisely what is the model number? __________________ Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links

5th January 2011, 04:15 PM	#8
807tubenut diyAudio Member Join Date: Jun 2010 Location: SinCity	I's it the black case/chrome end amp? I'v got one of them on the shelf, could be rebuilt, but it's not really worth it, if you need that amp to help fix yours, let me know, I only have like $7 or $8 total in it. __________________ All my battles have been won, But the war has just begun.


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5th January 2011, 02:52 PM	#3
mike49504 diyAudio Member Join Date: Sep 2006	A1275=BD139?

5th January 2011, 04:05 PM	#7
mike49504 diyAudio Member Join Date: Sep 2006	Ill try pulling the rectifiers . The amp is a Hifonics BXI 2008D The scope was set at 10 us .5 volts div

5th January 2011, 04:48 PM	#9
mike49504 diyAudio Member Join Date: Sep 2006	Pulled the rectifiers amp powers up and idle's perfectly

5th January 2011, 04:59 PM	#10
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Are the rectifiers leaking or shorted? Shorted rail caps? Intermittently shorted transformer? __________________ 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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