HP-65 1603S03504 - display not working at all

[teenix]

(11-13-2020 10:41 AM)albertofenini Wrote:  Hi Tony, thanks !

we'll take the anode driver out, and see what happens
at this point RCD should be working
as it should be Disp0 -> Disp4, since these are produced from the Hybrid, right ?

I may have asked this already, but how complicated is to engineer a replacement
for these chips, anode driver, cathode driver, card reader sense amplifier or roms
and rams ? Is there anything compatible that can be used nowadays ?

Thanks again !

Yes. The ARC chip in the hybrid normally generates the signals.

Replacements are all doable. I am looking into a few things now, but not being able to get home has stopped the works.

Not sure except for the good gear that Bernhard has created and the CPU replacement boards from me and Harald.

cheers

Tony