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7-4
WorkCentre C2424 Service Manual
Paper Preheater Cleaning (Remove Print Smears)
The paper preheater cleaning procedure is a function selected on the control panel by
the user. 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.
To perform the paper preheater cleaning cycle:
1.
On the control panel, select the
Print Quality Problems
menu and the
Remove Print Smears
menu.
2.
The system overheats the paper preheater to about 100
o
C, softening ink trapped
inside the paper preheater.
Ordinarily the paper preheater runs at temperatures of between 60
o
C and 65
o
C
for paper or transparency film printing.
3.
The system picks and passes approximately 12-24 sheets of paper through the
paper path. The first few sheets absorb and remove ink from the paper preheater.
The system 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 system 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 system
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 is lowered against the drum and
the drum rotates, which transfers some of the oil to the transfix roller. The transfix
roller is then raised to its standby position.
Drum Cleaning - Chase Page
The system 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 system 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). A chase
page is also run during startup/recovery if the system believes that there is ink on the
drum.
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