exxos's Atari, Amiga & retro forum

exxos wrote: 14 Jan 2021 15:14

DoG wrote: 14 Jan 2021 15:10 The recapped PSU I have been using (for over 1,5 years) put out 5.5V and that is not fine for the H5.

Odd.. But yeah 5.5V is a bit high anyway. Is your 70859 board using 2.2K bus resistors or the original ones ?

Hmm. I think I have changed them. But not 2.2K. It think it got 3.3K on address- and 4.7K on data bus.

I did a recap on another PSU but I remember that that one got hooked up to some large resistors and got adjusted when I first turned it on. I think it was used for the H4.

DoG wrote: 14 Jan 2021 15:24 Hmm. I think I have changed them. But not 2.2K. It think it got 3.3K on address- and 4.7K on data bus.

It might be why then.. I'm moving to 2.2K, they were 4.7K on the H5 series.. probably somethings just oscillating more at the higher voltage causing it not to boot. I think I had one of the remake boards running at 7V before :twisted: :twisted: