Post Reply 
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.
Find all posts by this user
Quote this message in a reply
Post Reply 


Messages In This Thread
RE: HP 41C Battery Contacts (Cleaning?) - ElectroDuende - 09-23-2014 03:47 PM



User(s) browsing this thread: 1 Guest(s)