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Home Forums Macintosh 128k 240v Analog Board Component Identification — #5 Macintosh 128k 240v Analog Board Component Identification — #5
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Are you sure that's the right picture? What I see there is a 2SC3260 (the 2S is usually omitted from the printed number) which is listed as an 800V 3A NPN power transistor. I suspect that's the chopper transistor in the power supply.
I've never seen an SCR in that package style.
Hello James,

I am in agreement with you that the failed component at Q10 is indeed a '2SC3260' from the power supply.

Would you have any recommendations for a replacement part that would be available online?

Would any power transistor with the same values do?

Thank you

mp.ls