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YORKE annunciator - HP-48/49
08-16-2016, 09:13 AM
Post: #4
RE: YORKE annunciator - HP-48/49

I have not looked at the schematics for a while, but if my memory serves me well, there is an always connected common line (grounded), and 1 line out of the Yorke for each indicator.

You are correct in assuming that the indicators do NOT go through the LCD multiplexer chips.


Although I work for the HP calculator group, the views and opinions I post here are my own. I do not speak for HP.
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RE: YORKE annunciator - HP-48/49 - TomC - 08-15-2016, 08:36 PM
RE: YORKE annunciator - HP-48/49 - cyrille de brébisson - 08-16-2016 09:13 AM

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