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HP 41C Battery Contacts (Cleaning?)
09-23-2014, 03:47 PM
Post: #4
RE: HP 41C Battery Contacts (Cleaning?)
(09-23-2014 02:45 PM)Eddie W. Shore Wrote:  
(09-23-2014 01:54 PM)ElectroDuende Wrote:  The problem here is taht the copper layer on the flex circuit is quite thin, so there are a lot of chances that it has been completely destroyed by the leak. You can start with a wet cotton to remove any leak rest and then gently polish with metal cleaner. If you find that the copper layer is removed, The Calculator Store has a repair kit that will let your battery contacts as new.

Regarding the wet cotton, would just water be sufficient?

As I suppose that the leak came from alkaline batteries, a weak acid will help to remove the remainings; you can use white vinegar, for example. But be sure to remove any remaining, as it will (with time enough) attack the copper.

Wha I usually do when I encounter a device with leaked alkalines is:

- Clean the remainings with vinegar or citric acid
- Rinse with distilled water
- Rinse with alcohol (isopropyl better, but I've also used ethyl)
- Air dry overnigth

To do so I'd recommend you to dissasemble the calculator, so you can rinse the mid module without risking the rest.
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RE: HP 41C Battery Contacts (Cleaning?) - ElectroDuende - 09-23-2014 03:47 PM

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