Specifications

Plug the power into the unit but keep it turned off ("OFF" should be on display).
Press and hold "MENU" button on unit, while holding pressed that key, do the
same with "TOP MENU" (now you have two buttons pressed) and finally do so
with "OSD" (you have to follow the sequence keeping pressed all previous keys)
Once you have "MENU" "TOP MENU" and "OSD" buttons, hold them for at least 3
seconds and "FACTORY" should appears on display. Turn on the unit
In order to put it back to normal, use "F SKIP" instead of "MENU", "B SKIP"
instead of "TOP MENU" and "POWER" instead of "OSD". "All Clear" should appear
on display.
Aiwa XD-DV370
Code 1;
Press the Pause button on your remote control. Using your remote control enter
the code 3, 1, 4, 1, 5 and 9. Press the 0 button on your remote control for Region
free, 1 for Region 1 or 2 for Region 2. Press the Pause button on your remote
control. Power off your player and wait a few seconds. Power on your player
Code 2;
Power on the player with no disc inserted, and wait for the "No Disc" message on
screen. Using the remote Press PAUSE and then Press the numbers 314159 in
order. Press the number of the region you desire. Press PAUSE. Power off the
player for a few seconds and power back up and insert your DVD disc!
Aiwa XD-DV480
Code 1;
Power on player with no disc inserted and wait for "No Disc" message on screen.
Using the remote Press PAUSE and then Press the numbers 314159 in order.
Press the number of the region you desire. Press PAUSE. Power off the player
for a few seconds and power back up and insert your DVD disc!
Code 2;
Same as above, but put 3412292 as the code.
Code 3;
same as above, but put 8926 as the code.
Code 4;
Same as above, but put 342292 as the code.
Aiwa XD-DW1
Turn on player, Insert any disc. Open the lid, take out disc and close the lid.
Immediately press [Stop] and wait few seconds. Press 8,7,1,0 and then >> on
remote. The player should be region free now!
Aiwa XD-DW5