Electronics > Repair

Identification of Transistor D471C on a PHIHONG PSA-2B PSU

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john2021:
Hello everyone,

I am trying to repair an Apple II clone PSU from the 1980s.

I have a shortened transistor, which reads "D471C Y-3C5".

Attached are photos of its location on the PSU board.

I was unable to identify it online.

I want to find an equivalent part.

I would appreciate your help in identifying and finding an equivalent.

Thank you very much in advance,

Joe

PA0PBZ:
Normally with a marking like that you put '2S' in front, so that would be 2SD471C.

john2021:
Thank you very much for your help.

I replaced it with a BC639 and now it is working.

Now the issue is with the motherboard, but I guess it's a question better suited for an Apple clone forum :)

Thanks again, much appreciated
Joe

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