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how to change date on uniwell px5700 cash register?

cash register did not recognise leap year
ash, February 2016
Haven't done much on Uniwells. I don't think this model has a menu for programming date and time. Try here for a manual:

https://the-checkout-tech.com/manuals/cashregisters/Uniwell1.php

Registerman, March 2016
link Click here to see other fixes for Uniwell.