HP-33C strange power / weak battery indicator problem

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HP-33C strange power / weak battery indicator problem

08-20-2021, 10:15 AM

Post: #4

teenix Offline

Senior Member

Posts: 2,165
Joined: May 2016

RE: HP-33C strange power / weak battery indicator problem

Check the connections to the main CPU chip and make sure none are corroded, especially the power supply pins (12 and 13). I think all the voltage testing is done inside this chip and the low volt drive comes out via pin 37.

cheers

Tony

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Messages In This Thread

HP-33C strange power / weak battery indicator problem - btreguier - 08-19-2021, 09:35 PM

RE: HP-33C strange power / weak battery indicator problem - teenix - 08-20-2021, 01:34 AM

RE: HP-33C strange power / weak battery indicator problem - btreguier - 08-20-2021, 08:24 AM

RE: HP-33C strange power / weak battery indicator problem - teenix - 08-20-2021 10:15 AM

RE: HP-33C strange power / weak battery indicator problem - btreguier - 08-20-2021, 11:53 AM

RE: HP-33C strange power / weak battery indicator problem - teenix - 08-20-2021, 12:43 PM

RE: HP-33C strange power / weak battery indicator problem - btreguier - 08-20-2021, 04:12 PM

RE: HP-33C strange power / weak battery indicator problem - btreguier - 08-20-2021, 07:42 PM

RE: HP-33C strange power / weak battery indicator problem - btreguier - 08-22-2021, 07:57 AM

RE: HP-33C strange power / weak battery indicator problem - Mike T. - 08-22-2021, 01:22 PM

RE: HP-33C strange power / weak battery indicator problem - btreguier - 08-22-2021, 11:09 PM

RE: HP-33C strange power / weak battery indicator problem - tangdfx - 04-07-2022, 11:53 AM

RE: HP-33C strange power / weak battery indicator problem - btreguier - 04-07-2022, 12:20 PM

RE: HP-33C strange power / weak battery indicator problem - teenix - 04-07-2022, 12:39 PM

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