YORKE annunciator

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YORKE annunciator - HP-48/49

08-16-2016, 09:13 AM

Post: #4

cyrille de brébisson Offline

Senior Member

Posts: 1,047
Joined: Dec 2013

RE: YORKE annunciator - HP-48/49

Hello,

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.

Cyrille

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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Messages In This Thread

YORKE annunciator - HP-48/49 - Peter HOFMANN - 08-15-2016, 09:29 AM

RE: YORKE annunciator - HP-48/49 - TomC - 08-15-2016, 08:36 PM

correct - RE: YORKE annunciator - HP-48/49 - Peter HOFMANN - 08-15-2016, 09:29 PM

RE: YORKE annunciator - HP-48/49 - cyrille de brébisson - 08-16-2016 09:13 AM

RE: YORKE annunciator - HP-48/49 - Peter HOFMANN - 08-16-2016, 10:56 AM

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