For 202G
1) Turn on the DVD-202G unit without a disc inside the tray. Open the tray.
2) Press the Setup button and bring the cursor down to Karaoke Setup.
3)Press 9999 followed by the regional code (ex. 1 for US, 6 for China, etc.). For all regions, press 9999 followed by 0 (zero).
4)Press the Setup button again and close the tray.

For 103G/105G/203G
1) Make sure that there is no disc in the tray.
2)Press Setup from the remote.
3)Press 9999 from the remote.
4)Press Stop from the remote.