Pioneer Amp

mike49504 · 27th May 2010, 09:46 PM

The power supply is blown in this amp Its using Irfz44's can i replace them with IRFZ48's?

Perry Babin · 27th May 2010, 09:59 PM

Probably but you need to provide more information. What model is it?

mike49504 · 27th May 2010, 10:20 PM

Its a GM-X332 4 channel amp.

Looks like they are using 56 ohm gate resistors

Perry Babin · 27th May 2010, 10:40 PM

I don't see a problem using the Z48s.

mike49504 · 27th May 2010, 11:23 PM

Perry,

I still have problems with this amp. I have no output out of any channel.

Amp produces no rail voltage and no voltage on the rectifiers also.

Power supply fets Leg1:5.66 Leg2:13.90 Leg3:13.90

Q857 (A933)
Leg1:13.90
Leg2:13.90
Leg3:13.81

Q656 (c1740)

1:0
2:0
3:.70

Perry Babin · 27th May 2010, 11:39 PM

You have an open ground trace. The 3rd leg of the FETs should be at 0v.

27th May 2010, 09:46 PM	#1
mike49504 diyAudio Member Join Date: Sep 2006	Pioneer Amp The power supply is blown in this amp Its using Irfz44's can i replace them with IRFZ48's?

27th May 2010, 09:59 PM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Probably but you need to provide more information. What model is it? __________________ Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links

27th May 2010, 10:40 PM	#4
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	I don't see a problem using the Z48s. __________________ Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links

27th May 2010, 11:39 PM	#6
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	You have an open ground trace. The 3rd leg of the FETs should be at 0v. __________________ Links >> Basic Car Audio Amp Repair * Basic Car Audio Electronics * New Site * Basic Switching Power Supply Design * Basic Computer Skills << Links

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


	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

27th May 2010, 10:20 PM	#3
mike49504 diyAudio Member Join Date: Sep 2006	Its a GM-X332 4 channel amp. Looks like they are using 56 ohm gate resistors

27th May 2010, 11:23 PM	#5
mike49504 diyAudio Member Join Date: Sep 2006	Perry, I still have problems with this amp. I have no output out of any channel. Amp produces no rail voltage and no voltage on the rectifiers also. Power supply fets Leg1:5.66 Leg2:13.90 Leg3:13.90 Q857 (A933) Leg1:13.90 Leg2:13.90 Leg3:13.81 Q656 (c1740) 1:0 2:0 3:.70

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Pioneer M25 power amp bias & offset adjust ?	Bernhard	Solid State	21	6th June 2010 05:47 PM
12"Pioneer 400W subwoofer with a RF Punch 360.2 amp?	bigwig	Car Audio	1	11th January 2005 05:42 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