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HP31E Missing Pin
03-17-2021, 11:51 AM
Post: #17
RE: HP31E Missing Pin
(03-17-2021 09:56 AM)PANAMATIK Wrote:  
(03-16-2021 03:32 AM)teenix Wrote:  Hi all,

I removed the pin 8 connection again and put a dap of epoxy on the chip where I Dremmelled the plastic away to protect it against moisture ingress.

I repaired the corroded and broken battery ribbon and what do you know, it sprang back to life :-)

cheers

Tony

Does it work without the chip? In this case moisture protection is not really necessary?

Bernhard

I don't know Bernhard, I didn't try. It's not my calculator so best I leave it as is and with the ribbon setup, I think the less handling the better.

It is quite odd that the chip is there in the first place. There are markings under the "paint" on the top surface but I cannot make them out. I couldn't imagine HP just putting them for no reason, and they would have been reasonably expensive in the day.

cheers

Tony
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Messages In This Thread
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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