- 67 -3. Maintenance2 Press the open button (A) and open the output tray (a).3 Take all the four image drums out of the machine, and then place them on aflat surface.4 Cover the image drums you took out with paper so that the image drums donot expose to the light.5 Turn the lock levers (b) on the both sides of the belt unit forward to unlock.6 Remove the belt unit by holding the lock lever (b).Possible to get burned.The fuser unit is extremely hot. Do not touch it.