While you wait for answers, we may have found some information which could help you.
Click here for Sharp Cash RegisterHow do I change tax rate on my Sharp XE-A202 cash register?
Paper Roll problem?
Mend Er-3110 cash register?
NADA but Error mess.Changed the batteries in my Sharp ER-A330 Cash Register?
Sharp xe-a137?
Sharp cash register XE-A102 frozen keyboard?