Replacing periodic maintenance parts

The periodic maintenance parts will need to be replaced regularly to maintain the print quality. The parts listed below will have to be replaced after printing approximately 25,000 pages for PF KitMP and 100,000 pages for PF Kit1, PF Kit2, Fuser and Laser. Please call Brother Call Center when the following messages appear on the LCD.
LCD message
Description
Replace Parts
PF kit MP
Replace paper feeding kit for MP tray.
Replace Parts
PF kit 1
Replace paper feeding kit for Tray 1.
Replace Parts
PF kit 2
Replace paper feeding kit for Tray 2.
Replace Parts
Fuser Unit
Replace fuser unit.
Replace Parts
Laser Unit
Replace laser unit.