HP-45 display issue - segments stuck on

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HP-45 display issue - segments stuck on

02-19-2023, 11:08 PM

Post: #6

teenix Offline

Senior Member

Posts: 2,045
Joined: May 2016

RE: HP-45 display issue - segments stuck on

I assume you are using a regulated 3.75VDC supply for the calculator power.

There are 3 x 5 digit LED modules for the display, maybe the middle one is faulty.

Does it revert to the previous way of working when back at 3.5V?

Have you measured the power supply rails inside the calculator?

cheers

Tony

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Messages In This Thread

HP-45 display issue - segments stuck on - Dave92F1 - 02-18-2023, 05:39 PM

RE: HP-45 display issue - segments stuck on - teenix - 02-19-2023, 12:48 AM

RE: HP-45 display issue - segments stuck on - Dave92F1 - 02-19-2023, 06:59 AM

RE: HP-45 display issue - segments stuck on - teenix - 02-19-2023, 08:09 AM

RE: HP-45 display issue - segments stuck on - Dave92F1 - 02-19-2023, 07:59 PM

RE: HP-45 display issue - segments stuck on - teenix - 02-19-2023 11:08 PM

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