When I convert Hex 7A to anything I get "28"and not "122"
Also if I convert Hex 5A to anything I get "20" and not "90"
7A is ASCII character cap Z
5A is ASCII character low z
I am confuse, am I doing something wrong?

fx-CG10 Version 01.03.0200
Sorry I was using ALPHA to write A B C D E F, it is not the same as just pressing A B C D E F without ALPHA.