Quote:
Originally Posted by Slothie
if you have replaced or tested the power supply electrolytics and any on the board?
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The power supply on these is remarkably uncomplicated - just a 7805, and the only associated electrolytic is a relatively small one on the input - could be worth changing though. On the regulated side it's all ceramics.
The only other electrolytic I see is a 1uF on pin 26 of the Z80 which the originator of the drawing has neglected to mark, but it is the _RESET pin of the Z80 so that's the reset capacitor, obviously.
I'm afraid there are disappointingly few electrolytics for recappers to go at on these. The PSUs do have a bigger electrolytic in them and that will have been roasted by the heat from the transformer but John has two power supplies which I think power his other ZX81 OK.