Marantz DV-3100 region-free hack

NOTE: Please note that this conversion may only work a maximum of 25 times! After this time the machine may end up locked to the last region changed to

Turn On without a disk in the tray and wait for "No Disk" on font panel display

Key in on the Remote Control, press Pause, then 3 1 4 1 5 9

The word COdE is displayed on the front panel

Key in the number of the Region you want to use, or 0 for Multi-Region

Then press Pause again