HP LaserJet 4250 Service Manual - Page 100

Performing preventive maintenance Replace specific parts when the PERFORM PRINTER MAINTENANCE message appears on the printer control-panel display. This helps the printer maintain optimum performance. The maintenance message appears every 200,000 pages on HP LaserJet 4200/4300 Series printers or every 225,000 pages on HP LaserJet 4250/4350 Series printers. The message can be temporarily cleared for approximately 10,000 pages by using the CLEAR MAINTENANCE MESSAGE item on the Resets submenu (see Control-panel menus). To check the number of pages that the printer has printed since new maintenance-kit components were installed, print either a configuration page (see Configuration page) or a supplies status page (see Supplies status page). To order the printer maintenance kit, see Parts and diagrams. The kit includes the following components: ■ Fuser ■ Printer rollers (transfer, feed, and separation, and tray 1 pickup) ■ Tray 1 rollers ■ Rollers for optional 500-sheet feeders ■ Rollers for optional 1,500-sheet feeder ■ Installation instructions NOTE The printer maintenance kit components are consumable items that are not typically covered under the original printer warranty or under most extended warranties. Resetting the maintenance-kit counter (LJ 4200/4300) After a maintenance kit is installed, the maintenance-kit counter must be reset by using the following procedure. 1 Turn the printer power off. 2 Hold down (SELECT button), and then turn on the printer power. Continue holding down until all three printer control-panel lights flash once and then remain on. This might take up to 10 seconds. 3 Press (UP ARROW button) to scroll to NEW MAINTENANCE KIT. 4 Press to reset the maintenance-kit counter. NOTE Perform this procedure only after a maintenance kit has been installed. Do not use this procedure to clear the PERFORM PRINTER MAINTENANCE message temporarily. 86 4 Maintenance