To reset code HN-00 on the copiers:
- Double-tap the Home
button
- Tap the “ver x.x.x.x”
number in the bottom right
- Enter simulation mode by
touching the following keys in sequence:
# * C * [hash – star – C -star]
- Touch code “14” (it’s an
error cancellation code) and then touch “Execute” (at the bottom) and
confirm.
- Reboot the copier by
tapping the left-curling “back” arrow (it’s in the upper-right) (you can
also just turn it off and on)
https://www.manualslib.com/manual/1457773/Sharp-Mx-3070n.html?page=50