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my 12V power supply quit working pyramid ps-46kx
my 12V power supply quit working pyramid ps-46kx
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Old 22nd May 2011, 07:37 PM   #1
mrflamboynt is offline mrflamboynt  United States
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Join Date: May 2011
Default my 12V power supply quit working pyramid ps-46kx

so the power supply is connected to a battery, battery is connected to amp (RD-D5) i had it turned up a little bit, then bumped the outlet, everything turned off.... now the power supply wont turn on, it blew the 8A 32V fuse, replaced it, but still nothing.... red light on switch comes on, but nothing else... no fan, no lights on the guages, no buzzing from the insides..... im hoping i didnt kill it... I NEED IT! anyone maybe know what happened? or tell me how i can find out anything???

thanks in advance!
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Old 22nd May 2011, 07:53 PM   #2
DJDestiny is offline DJDestiny  Singapore
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Join Date: Feb 2011
Quote:
Originally Posted by mrflamboynt View Post
so the power supply is connected to a battery, battery is connected to amp (RD-D5) i had it turned up a little bit, then bumped the outlet, everything turned off.... now the power supply wont turn on, it blew the 8A 32V fuse, replaced it, but still nothing.... red light on switch comes on, but nothing else... no fan, no lights on the guages, no buzzing from the insides..... im hoping i didnt kill it... I NEED IT! anyone maybe know what happened? or tell me how i can find out anything???

thanks in advance!
Isn't the red light for protection ? If it's continuously in protection , something is not right . Check the internals .
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Old 22nd May 2011, 08:20 PM   #3
mrflamboynt is offline mrflamboynt  United States
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Join Date: May 2011
i've used quite a few of these supplies..... the red light comes on when you turn the unit on....

here is the link to the circuit diagram.... however, its written in japanese

http://www.pyramidcaraudio.com/manuals/PS46KX.pdf

Last edited by mrflamboynt; 22nd May 2011 at 08:28 PM.
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Old 23rd May 2011, 01:20 AM   #4
Perry Babin is offline Perry Babin  United States
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Location: Louisiana
Generally, when the main fuse blows, the rectifier has failed.
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Old 23rd May 2011, 06:44 PM   #5
mrflamboynt is offline mrflamboynt  United States
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Join Date: May 2011
interesting .... thanks for the reply.... i will check that out..... on another forum, a member had mentioned a bad diode in the overload protect circuit (one marked P6K E39A), does this sound like a plausible idea?
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Old 24th May 2011, 12:23 AM   #6
Perry Babin is offline Perry Babin  United States
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Location: Louisiana
It's possible, I guess. In all of the Pyramid power supplies that I've repaired, the rectifiers failed.
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