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Old 28-12-2014, 19:43   #9
pksato
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Join Date: Oct 2011
Location: Maringá, Pr, Brazil - 21.24S 51.55W
Posts: 102
Hi,
My radio was not holding date, all time when I apply power, its is reset time, and need to set clock.
After some search I found a datasheet with pinout of RS500 module, and other information, can have a optional super capacitor to maintain power to RTC. After some inspection, a found what capacitor is fault, not retain charge. I replace it with a 3V rechargeable battery, charged by 1.6V. Now I have a RTC working after power cut.
https://picasaweb.google.com/lh/photo/b8UK25LFcf_KL1OYHPfyW9MTjNZETYmyPJy0liipFm0?feat=d irectlink
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