Oh, I did not see the 2A rating. Sorry. This is an internal fuse which
means that something is not right with the current limiter circuit.


2A 250V relay type fuse which is expensive (RM1 each). The advise from
my superior is that the rectifier is faulty.



What type of PSU is it, any id? Maybe there is a schematic for it.

There's a marking "TPG40/65H" . It is a typical DC12V PSU. Newer PSU
models are made by Meanwell.

And, could I use 470 Ohm preset in place of original 500 Ohm ones?

Thanks