Printer Self-Maintenance; Printhead Maintenance Cycle (Eliminate Light Stripes) - Xerox Phaser 8400 Service Manual

Printer Self-Maintenance

To maintain peak operation, reliability, and print quality, the printer has several
automatic or semi-automatic maintenance functions. These functions may be started
automatically after a certain number of prints or during printer startup, or they may be
started by the customer if a print-quality defect is noted.
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Printhead Maintenance Cycle (Eliminate Light Stripes)

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Paper Preheater Cleaning (Remove Print Smears)
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Transfix Roller Oiling
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Drum Cleaning (Chase Page)
Printhead Maintenance Cycle (Eliminate Light Stripes)
The printhead maintenance cleaning cycle removes bubbles or foreign matter that
cause a printhead jet to malfunction. Three basic actions take place during a cleaning
cycle:
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Purging
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Wiping
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Printing the Cleaning Page
There is one basic type of cleaning cycle performed by the purge system. The first
customer purge and the manufacturing purge consist of two basic cleaning cycles
performed sequentially. A cleaning cycle is performed when the printer is first
powered on, if the ink reservoir has cooled to the point that a cleaning cycle is
triggered. A cleaning cycle is not performed when the printer is coming out of
standby mode. Refer to the purge system topic in this chapter for more detail on the
printhead maintenance cycle.
Warning
When servicing the printer be careful of the purge system as it passes the
printhead. If a damaged wiper blade of the purge system catches on the
printhead, it could propel hot liquid ink upward into your face.
Theory of Operation 2-33