WARNING: All user stored data will be deleted. If the current settings and data are not expendable, create a backup before executing the Factory Reset.
1) Turn on the power.
NOTE: All buttons must be pressed and held simultaneously in sequence to engage the test routine.
2) Press and hold down the [SHIFT] button, together with the [STORE] button and then the [EXIT] button.
3) The SY85 will run the initial test routine and display the test menu.
4) Press the [MENU] button. The SY85 will execute test 44 ''Factory Set'' and return to play mode.
5) Press the [+1] button.
6) Reload the internal memory (Synthesizer Data) from the 3.5'' Factory Floppy Disk. This step is required because all Synthesizer data is deleted.
a) Press the [UTILITY] button.
b) Press the SUB MODE 'DISK' button.
c) Press the [F1] button.
d) Press the [ENTER/YES] button twice.
Reference: Owner's Manual, p.225