PS-52KX breaker popping

[airplane1]

I have a PS-52KX power supply from Pyramid. I have it less than a year and was running an amp with it. Today it started popping the breaker on the back. I unhooked all devices from the power supply made sure it was turned off and had no shorts anywhere. I pushed the reset button on the back to reset the breaker, turned it on and it hums load and within 2 seconds pops off again.

What should I look for that can be causing this problem?

I did not check the fuse inside yet. the manual says there is a 10 amp fuse inside but if it were bad I would think the power supply would not turn on at all.

Please help, it was expensive and I cant aford another at this time.

AP

 

[DIRTYWHITEBOY]

Check the bridge rectifiers

 

[Sonwatcher]

Roger, TonyV is very familiar with those supplies and their problems.

 

[TonyV225]

Hi you have a lengthly PM with instructions I hope this helps....Tony

 

[Robb]

Had a friend's Pyramid do the same thing a few months ago. Turned out to be one of the pass transisor/regulator was gone. He had ran his on the floor and it picked up a lot of dust and clogged the fans inside, heated it up too much. Ended up replacing the bridge rectifiers as well as some of the pass transistors.

 

[dxhound]

Def look into the rectifiers and when you order replacements. Get some higher amperage units. I also upgraded my pass transistors and most of the wiring.