This document provides information regarding changes HP implemented to estimate the life of a maintenance kit and suggestions of how to determine the estimated life of the maintenance kit.
Customers who have historically viewed the Maintenance Kit Interval and the Pages Since Last Maintenance information to calculate the estimated life of the maintenance kit should now view the Supplies Status Page to estimate the life of the maintenance kit. HP LaserJet Enterprise printers using firmware version 3.4 or newer will no longer list the Maintenance Kit Interval information in the Configuration Page. HP implemented this change because the number of Engine Cycles of a maintenance kit in these printers more accurately reflects the available usage of the maintenance kit.
This change does not apply to HP LaserJet Enterprise Color printers.
Thus, HP decided to change the measurement of the maintenance kit life estimates to be based on Engine Cycles instead of pages to more accurately reflect and communicate the life of the supply messages on the printerís control panel.