4.Hold the cartridge as shown below, and insert it all the way into the toner cartridge slot until it stops.
5.Turn the cartridge knob 90 degrees clockwise so that the N symbol on the knob is in the position shown below. By turning the knob, the cartridge is pressed into the slot and installed completely.
cCaution:
Be sure to turn the knob all the way to the locked position. Otherwise, you may have toner problems or leakage.
12Assembling the Printer