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HP31E Missing Pin
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03-13-2021, 12:12 PM
(This post was last modified: 03-13-2021 12:12 PM by AndiGer.)
Post: #2
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RE: HP31E Missing Pin
Hi Tony,
Look into this thread - especially last post: https://www.hpmuseum.org/cgi-sys/cgiwrap...read=24353 Tony Duell mentions pin 8 is the power supply pin on all small IC chips inside a spice. The C models have this IC pin directly connected to PSU / battery to retain RAM content. Andi |
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HP31E Missing Pin - teenix - 03-13-2021, 07:49 AM
RE: HP31E Missing Pin - AndiGer - 03-13-2021 12:12 PM
RE: HP31E Missing Pin - teenix - 03-13-2021, 01:51 PM
RE: HP31E Missing Pin - [kby] - 03-14-2021, 03:28 AM
RE: HP31E Missing Pin - teenix - 03-14-2021, 07:46 AM
RE: HP31E Missing Pin - PANAMATIK - 03-13-2021, 05:28 PM
RE: HP31E Missing Pin - teenix - 03-14-2021, 07:42 AM
RE: HP31E Missing Pin - ThomasF - 03-14-2021, 08:09 AM
RE: HP31E Missing Pin - teenix - 03-14-2021, 08:18 AM
RE: HP31E Missing Pin - teenix - 03-14-2021, 10:47 AM
RE: HP31E Missing Pin - PANAMATIK - 03-14-2021, 04:44 PM
RE: HP31E Missing Pin - ThomasF - 03-15-2021, 12:16 PM
RE: HP31E Missing Pin - AndiGer - 03-15-2021, 07:10 PM
RE: HP31E Missing Pin - teenix - 03-16-2021, 03:32 AM
RE: HP31E Missing Pin - PANAMATIK - 03-17-2021, 09:56 AM
RE: HP31E Missing Pin - teenix - 03-17-2021, 11:51 AM
RE: HP31E Missing Pin - AndiGer - 03-16-2021, 05:11 AM
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