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21st June 2011, 05:42 PM
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#1 |
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diyAudio Member
Join Date: Dec 2009
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rockford fosgate bd1500.1
hi all.firstly forgive me if i opened a new thread in the wrong place.please direct me here moderators.
now then.i got a rockford fosgate bd1500.1 from a friend that goes into protect when powered up.so i took it apart and found one fet reading short.its irf3415 i'm assuming this is in the output section.so i disconnect this fet from the board and tried startin the amp again.this time it draws excessive current from my power supply and blows the fuse.all the while its whining a lot too.i tried desoldering the red + black wire to isolate the amplifier section and it starts up ok idling at around 2 amps.also tested the transformer and its output is around 59 volts ac. please lead me as to where else i must check now.. |
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22nd June 2011, 05:34 AM
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#2 |
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diyAudio Member
Join Date: Aug 2003
Location: SIMI VALLEY CA
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ROCKFORD BD1500
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23rd June 2011, 12:34 AM
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#3 |
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diyAudio Member
Join Date: Apr 2008
Location: Carlisle, England
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Interesting it still draws too much current with the faulty FET removed.
Are you sure the other one hasnt gone as well ? Or could be chip that has been wiped out with the FET?
__________________
http://www.murtonpikesystems.co.uk PCBCAD40 pcb design software. |
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23rd June 2011, 01:55 PM
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#4 |
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diyAudio Member
Join Date: Dec 2009
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hi my addy is robin_22x@yahoo.com.
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23rd June 2011, 01:57 PM
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#5 |
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diyAudio Member
Join Date: Dec 2009
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which chip do you refer to nigel?
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25th June 2011, 02:52 PM
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#6 |
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diyAudio Member
Join Date: Dec 2009
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ok guys i pulled the outputs from this amp and all the current issues ect is sorted out but i still have the protect light on.any thoughts will be appreciated .
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2nd July 2011, 09:28 PM
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#7 |
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diyAudio Member
Join Date: Dec 2009
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still waiting on the schemes moer....
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