my 12V power supply quit working pyramid ps-46kx

[mrflamboynt]

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!

[DJDestiny]

Originally Posted by mrflamboynt

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 .

[mrflamboynt]

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

[Perry Babin]

Generally, when the main fuse blows, the rectifier has failed.

[mrflamboynt]

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?

[Perry Babin]

It's possible, I guess. In all of the Pyramid power supplies that I've repaired, the rectifiers failed.