GT-MK Factory Reset

Summary

Used when GT-MK needs to be reset to factory default, or if it is stuck in a certain status, such as reception mode, connecting, and others.

Solution

1. Turn on all dip switches (1-4) on SW1.
2. Turn on the power while pressing the Door Release and Light buttons.
3. Release these buttons when the entire display turns on.
4. Press Door Release button with the handset down.
5. The display turns on again, then turns off about 20 seconds later when it is done.