My Casio AP 220 suddenly is completely out of tune. I've found factory resets for other models, but not this one. How can I reset it or fix it?

SOURCE: is there a "Factory Reset"

Here is a link to the manual:http://ftp.casio.co.jp/pub/world_manual/emi/en/PX410R_e.pdf Page E-79 describes the procedure. Here is a link to their support page in case you don't have the CD that was bundeled with the keyboard:http://www.casio.com/support/

SOURCE: Our Casio Celviano AP-620 won't

My AP-620 has a pedal problem too... it sticks and I keep hearing the music I play ring out after the pedal is relaesed

SOURCE: How do you factory reset a Casio CTK-710?

http://support.casio.com/pdf/008/CTK710_e.pdf

i dont think there is actually a way to do it. But if there is it is in the manual which i have supplied a link to. i scanned through it but didn't see anything about it. What problem might you be having in need of a reset?