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Old 27th May 2010, 09:46 PM   #1
mike49504 is offline mike49504  United States
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Default Pioneer Amp

The power supply is blown in this amp Its using Irfz44's can i replace them with IRFZ48's?
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Old 27th May 2010, 09:59 PM   #2
Perry Babin is offline Perry Babin  United States
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Probably but you need to provide more information. What model is it?
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Old 27th May 2010, 10:20 PM   #3
mike49504 is offline mike49504  United States
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Its a GM-X332 4 channel amp.

Looks like they are using 56 ohm gate resistors
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Old 27th May 2010, 10:40 PM   #4
Perry Babin is offline Perry Babin  United States
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I don't see a problem using the Z48s.
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Old 27th May 2010, 11:23 PM   #5
mike49504 is offline mike49504  United States
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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
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Old 27th May 2010, 11:39 PM   #6
Perry Babin is offline Perry Babin  United States
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Location: Louisiana
You have an open ground trace. The 3rd leg of the FETs should be at 0v.
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