2. Reset the firmware counter and initialize the toner concentration.
IMPORTANT: The front door must be open at the beginning of this procedure. Do not close the door until
instructed.

a. From the Home screen on the printer control panel, select the Support Tools menu.
b. Select the Service menu.
c. Make sure that Service Access Code is selected in the drop-down menu, and then enter the service
access code.
d. Select the Service Tools menu.
e. On the Information tab, select the Supply Status menu.
f. Select Field Replacement Unit.
g. Select Development Unit (Developer) (CMYK).
h. Select the check box on the right side of the screen for the replaced developer unit.
i. Select Reset, to clear the counter and begin the toner concentration initialization.
j. Close the front door, wait for the toner concentration initialization process to complete, and then exit
service mode (touch the Home button).