How to locate your printer's serial number you are using, you can check the serial number by printing out the network setting information of the printer For more on printing, search for "NR044" on your printer ' s Online Manual and see the instructions shown.
Perform White Level calibration 4. Click the White Level button. 5. Load the white calibration sheet into the printer s sheet feeder (as if you were going to print on it) with the cut corner in the upper left position. 6. Click OK.