2-34 Phaser 8400 Color PrinterPrinter Self-MaintenanceTo maintain peak operation, reliability, and print quality, the printer has severalautomatic or semi-automatic maintenance functions. These functions may be startedautomatically after a certain number of prints or during printer startup, or they may bestarted by the customer if a print-quality defect is noted.■ Printhead Maintenance Cycle (Eliminate Light Stripes)■ Paper Preheater Cleaning (Remove Print Smears)■ Transfix Roller Oiling■ Drum Cleaning (Chase Page)Printhead Maintenance Cycle (Eliminate Light Stripes)The printhead maintenance cleaning cycle removes bubbles or foreign matter thatcause a printhead jet to malfunction. Three basic actions take place during a cleaningcycle:■ Purging■ Wiping■ Printing the Cleaning PageThere is one basic type of cleaning cycle performed by the purge system. The firstcustomer purge and the manufacturing purge consist of two basic cleaning cyclesperformed sequentially. A cleaning cycle is performed when the printer is firstpowered on, if the ink reservoir has cooled to the point that a cleaning cycle istriggered. A cleaning cycle is not performed when the printer is coming out ofstandby mode. Refer to the purge system topic in this chapter for more detail on theprinthead maintenance cycle.WarningWhen servicing the printer be careful of the purge system as it passes theprinthead. If a damaged wiper blade of the purge system catches on theprinthead, it could propel hot liquid ink upward into your face.
