Re: SFM 40 Diode?

[Embryp]

I just got a message saying my mail had been sent. I did not send any mail. I was using alt tab so I could bring up your E-mail to cut your last. I have no idea what AOL decided to send.
I'm being stupid here. In service work, nothing can be taken for granted. There is no assurance that either replacement part is actually equivalent to the original number you have. If there is any sign that they have been replaced before, we need to locate the specs on the original part number you have. It would be helpful if I knew the function of the diode, the parameters it is dealing with, etc. I still however feel the diodes check properly. You can test them with a curve tracer or a current limited power supply. Either will have to supply the breakdown voltage so as to make the diode reverse conduct. To test in forward mode, you would need a current limited HV supply. Usually High voltage diodes have internally, diodes in series. So, it's possible one has shorted. Diodes normally fail by shorting rather than opening. To open, they usually explode or at least show signs of heat.
However one shorting in the series would still read open in one direction.
I'll try to find the specs on the original after dinner.
phe
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Since you said it's in the same place on the other board, I would assume it's an equivelent.
phe

Yep, that's it; I read the D as an O.� I wonder if the SFM40 is a high voltage diode also?