After a maintenance kit is installed, the maintenance
kit counter must be reset.
1 When printer is on, press the Home button to enter
into the menus.
2 Scroll down to Device Maintenance, press
3 Select Service, press OK button.
4 Select Service Access Code, enter service PIN
number. Service PIN numbers are as follows: M601
= 10060111, M602 = 10060211, M603 = 10060311.
Note: Most M600 series use the PIN number for an
M603 printer reguardless if it is an M601 or M602
printer. Use the M603 PIN number on your printer if
you have an invalid number prompt after the code
5 Once in the service menu, scroll and select Cycle
Counts. Select Maintenance Count, set this to 0.