Xerox Phaser 8400

2-34 Phaser 8400/8500/8550 Color Printer
Paper Preheater Cleaning (Remove Print Smears)
This customer-initiated cleaning procedure is selected by choosing Remove Print
Smears on the Control Panel’s Print Quality Problems menu. This procedure
cleans ink out of the paper preheater that may have been deposited there. Heavier-
weight, high-grade quality paper works best for this procedure. Ink can also be
deposited if a jammed print, with ink on it, was pulled backwards through the paper
preheater.
In the paper preheater cleaning cycle, these events take place:
1. The customer selects the Remove Print Smears menu item.
2. The printer overheats the paper preheater to about 110
o
C, softening ink trapped
inside the paper preheater. Ordinarily the paper preheater runs at temperatures of
between 60
o
C and 70
o
C for paper or transparency film printing.
3. The printer picks and passes approximately 12-24 sheets of paper through the
print path. The first few sheets absorb and remove ink from the paper preheater.
The printer continues to pass sheets of paper though to cool the preheater until
normal operating temperature is reached. If duplex capability is enabled, 5 sheets
of paper go through the simplex paper path and up to 20 sheets go through the
duplex paper path.
4. The printer returns to the Print Quality Problems menu.
Because of the higher paper temperatures involved, this function can also be used to
clean the drum surface of ink deposits caused by a contaminated blade on the drum
maintenance system.
Transfix Roller Oiling
Oiling the transfix roller prevents ink from sticking to it. Every 50 prints, the printer
performs a transfix roller oiling cycle. During this cycle, oil is applied to the drum as
it would be during a print cycle. The transfix roller then lowers against the drum and
the drum rotates, transferring some of the oil to the transfix roller. Finally, the transfix
roller raises to its standby position.
Drum Cleaning - Chase Page
The printer performs a drum cleaning with a chase page automatically anytime a
paper jam occurs. The chase page transfers any image, which may not be complete,
off the drum. The printer then attempts to reprint the print that jammed. The chase
page is processed the same as a regular print, except that the drum is not oiled and no
image is printed on the drum (since an image is already printed on the drum).