apzpins,
@apzpins@mstdn.games avatar

Time to take a stab at this thing. The LM338k regulator has finally failed on this WhiteStar platform driver board. I wish there was a switching PSU replacement for it like there is for the LM323K used in WPC games.

The regulator is at the upper left corner with a huge heat sink. It runs quite hot!

root42,
@root42@chaos.social avatar

@apzpins Do you replace it with another NOS LM338k? Or With a LM338T in TO220?

apzpins,
@apzpins@mstdn.games avatar

@root42 I still have NOS ones, I stocked them back in the days before the fakes surfaced. But I'd love a switched PSU replacement like the 323K has.

root42,
@root42@chaos.social avatar

@apzpins How common are the 338K in those machines? And which voltages are they usually used for?

apzpins,
@apzpins@mstdn.games avatar

@root42 From what I own, only one platform uses it and it has one of them. It produces 5v, 5A in these games and drives everything from the CPU to external devices that run on 5 volts.

root42,
@root42@chaos.social avatar

@apzpins Ok, if push came to shove you could use another 5A 5V regulator instead. That's good. And they don't seem to be very common.

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