DaveC wrote:

Thus spake Palindr˜»me:

Any chance of reverse-engineering the bit of the circuit it is used in, and
producing a bit of a circuit diagram?

Not very good at this... just a component-test monkey (c:

But it (and its partner) seems to be across a c.t. winding of the SMPS
transformer. Electrolytic filter caps "downstream" from these are rated at
25v.

You mean the anode ( or cathode ) of the diode is directly connected to a
reservoir cap ? It'll be a rectifier on the secondary side. It needs to be a high
speed type and from your mention of 25V, I'd probably use a 200V part ( for
safety's sake ). Current rating - you say it looks like 1A - would suggest a
UF4003 replacement. Are you sure about the current rating though ?
http://www.chipdocs.com/datasheets/d...CC/UF4001.html

Graham