Hello,

I was under the impression that 770 drums could be reprogrammed from A3 to Ledger in the protected test mode settings (9874) via the code 1210.

Looking in the MZ Tech manual there aren't any codes for programming the drum, but there is a section that describes the possibility.
I compared the manual to the EZ and RZ manuals where they have codes for Ledger (117) but this doesn't work on the MZ.

Has anyone had success reprogramming the drums from the EU model to the US?

All best,

PJ