GK420D og LP2844-Z:

1. Press and hold the feed button while the printer is on.
   
   
2. During this it will flash in sequences 1, 1-2, 1-2-3, 1-2-3-4.
   
   
3. Allow it to flash twice and release the button.
   
   
4. 3-5 blank labels will come out.
   
   
5. Press the feed button one time to exit dump mode. A label with the message "Out of dump" will be printed.
   
   
6. The calibration has been performed.

LP2844:

1. Turn off the printer at the back.
   
   
2. Hold the feed button down while turning the printer on again.
   
   
3. Release the button after the status light flashes 2 times.
   
   
4. 3-5 labels will be printed.
   
   
5. Press the feed button 1 time to exit dump mode. A label will the message "Out of dump" will be printed.
   
   
6. The calibration has been performed.