Zenith DVC-2200, DVC-2201, DVC-2381, DVC-2550, DVC-5201
Power On the player with no disk in the drive
Press Pause on the Remote
Enter 3 1 4 1 5 9 on the Remote (the word COdE appears on the display)
Enter 0 on the Remote (0 = All Regions, 1 = Region 1, 2 = Region 2, etc.)
Press Pause on the Remote
Power the player off and then back On
VCD Hack:
Power on the player with no disk in the drive
Press Pause on the Remote
Enter 1 4 7 2 on the Remote (the characters 01 47 should appear on the display, if your player is a non UK model, this number will probably be different)
Press the Up arrow Three times (the characters 04 Fd should appear on the display)
Press Program, 6, Program, 5 (the characters 04 FE should now be displayed)
Press Enter (the display should flash briefly)
Press Return
Power the player off and then back on
Play a VCD