1746-p1 power supply

HI EXPERTS

I HEAR HUMMING NOISE FROM POWER SUPPLY 1746-P1 ANY ADVICE.

THANKS EXPERTS

mechanical?

Make sure there are no un-tightened screws, the ones that
attach the power supply to the chassis, AND the ones that
fasten the chassis to the backplate.

Make sure, perhaps by removing and turning over the unit,
that no stray material has fallen into the slotted cover
on the top of the unit. When the unit ships, there is a
adhesive backed piece of paper attached to the top, to
act as a barrier during construction. Sometimes these
get removed before construction, and 'stuff' can fall
down in the power supply.

Let us know what you find.

Get some ear plugs.

1746-P1 Circuit Diagram

I wonder if someone have available the circuit diagram of 1746-P1 (Allen Bradley Power Supply).

I'm trying to fix a board and it could be easier with the circuit diagram.

Thanks a lot!!!

If no-one else is going to say it then I will:

It's only humming 'cos it doesn't know the words

Sorry, couldn't help myself there.