I have a 20001BD from Rockford Fosgate, it was going into protection mode, the power supply FETS and output FETS were blown so I replaced them all. The amp idled with 1.7Amps out of protection mode with no output mosfets installed. I then replaced the output drivers and the amp still idled out of protection mode. After I replaced the drivers though, I only installed one ground screw on the board to the chassis. There are about 12 ground screws, the amp idled and then after 35 seconds C61 and C74 both puffed up in smoke and I shut it off immediately.
My questions are, is 1.7 amps the correct idling current for this amp, I have been testing it without output mosfets installed is that safe?
Also, the lack of putting all the ground screws that caused both capacitors to blow up? I think C61 is a filtering capacitor for the alternator ripple of the car, is C74 a coupling capacitor?
How could lack of ground screws blown these caps? Attached schematic sections
Is it safe to remove the caps and continue testing and troubleshooting until new ones arrive?
Thanks
My questions are, is 1.7 amps the correct idling current for this amp, I have been testing it without output mosfets installed is that safe?
Also, the lack of putting all the ground screws that caused both capacitors to blow up? I think C61 is a filtering capacitor for the alternator ripple of the car, is C74 a coupling capacitor?
How could lack of ground screws blown these caps? Attached schematic sections
Is it safe to remove the caps and continue testing and troubleshooting until new ones arrive?
Thanks
Attachments
Those screws actually make the gnd connection for all of the power supply fets, without them installed the power supply wasn't running. By installing one you allowed one fet to drive the supply.
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