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Any body have board schematic for Rockford Fosgate 800a2?
Any body have board schematic for Rockford Fosgate 800a2?
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Old 6th November 2017, 04:30 PM   #1
rockfordfanatiq is offline rockfordfanatiq
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Default Any body have board schematic for Rockford Fosgate 800a2?

anybody have a schematic for a Rockford Fosgate punch 800a2 ?
Board # pc-2038-c

please email to swansond@vmcmail.com

thanks
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Old 6th November 2017, 06:40 PM   #2
Perry Babin is offline Perry Babin  United States
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See attached.
Attached Files
File Type: pdf 99_amps_punch_g800a2_schematic.pdf (518.6 KB, 63 views)
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Old 7th November 2017, 07:29 AM   #3
rockfordfanatiq is offline rockfordfanatiq
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thank you very much Perry!!
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Old 7th November 2017, 07:33 AM   #4
rockfordfanatiq is offline rockfordfanatiq
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now my question is< q3 and q4 were both burnt. as i would power it up it would blow the 10amp fuse. replaced the q3 and q4 transistors. now it will power on but it seems they still are getting hot which makes me believe something else is wrong. i removed c2 and c18 capacitors because i believe they are both bad. would that cause Q3 and Q4 transistors to get hot and burn up?
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Old 7th November 2017, 08:59 AM   #5
Perry Babin is offline Perry Babin  United States
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Shorted power supply FETs?
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Old 7th November 2017, 01:07 PM   #6
rockfordfanatiq is offline rockfordfanatiq
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I donít believe so. They all tested out ok however I guess that doesnít mean anything right.
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Old 8th November 2017, 12:01 AM   #7
seankane is offline seankane  United States
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What are the readings in ohms using your meter from gate to source on the power supply FET's?
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Old 8th November 2017, 01:51 AM   #8
Perry Babin is offline Perry Babin  United States
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Do they heat up without B+ applied?

Is D6 or D7 shorted?

Are you sure that you installed the NPN and PNP driver transistors in the right locations?
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Old 8th November 2017, 02:44 AM   #9
rockfordfanatiq is offline rockfordfanatiq
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Perry, hate to sound stupid but Iím not really sure. Didnít really realize they were different until now. Just looked at the schematic. When I ordered and replaced them I just automatically assumed they were they same transistors. Now Iím going to have to go back and check them. I will also check the ohms at the mosfets and see what they read. Will get back on it tonight when I get home from work. Thank you for the input! And Iíll let you know how it goes.
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Old 8th November 2017, 02:49 AM   #10
rockfordfanatiq is offline rockfordfanatiq
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C2 and c18 capacitors has white residue around the bottom of them which is why I figured they would need replaced. I will also check d6 and d7 tonight.
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