Re: 41-CV repair help Message #3 Posted by Woody on 14 Jan 2003, 11:19 a.m., in response to message #1 by Jim Kimes
It sounds as though the corrosion that was on the battery contact points might have caused a loss of continuity by deposits or by eroding the copper contact strip on the module bar. This was my problem as well. The dissassembly of the calculator and reassembly is not the difficult part. The real trick is finding the battery contact/module bar to replace the failed part. They are few and far between.
Another issue that I found when I took mine apart was that the corrosion had leaked down onto the PCB. Although it did no damage to the circuits, it left deposits and could have caused a short. I used the process I always use when cleaning a cell phone or calculator to remove deposits. Toothbrush, alcohol, and WD-40 used properly followed by a proper drying period seemed to work well.
Anytime you open a case you are also liable to find cracked posts, detached/failed screw bosses, and age-embrittled parts. Good luck with your repair.
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