Question about Sharp Zaurus ZR-5700

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I installed replacement batteries with the polarity reversed. Since then unit does not display the Contact file, but all other functions (activities, data files, etc.) seem unimpaired. Any ideas? I really need the contacts, as I am lost without them. A check of the Memory file indicates a total of approximately 2500 entries in the three files.

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  • Sharp Master
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Hi, well the reason this has happened is that these contacts are stored in battery backed up NVRAM, now this RAM is very sensitive to polarity reversal, and also due to the way it works, doesn't have polarity reversal protection, on that circuit. So when you reversed those batteries even though the reverse polarity protection saved the Unit as a whole, the NVRAM would have been destroyed or wiped at best. These is no real way of replacing this NVRAM, I guess you could send it back to the factory though and ask for a "Quote" with view to the repair.

Posted on Sep 15, 2010

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Posted on Jan 02, 2017

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