Printronix L5035, Maintenance Manual

Page: 43 / 352

Inside the Front Cover
421
18. Remove the new photoreceptor drum from its package. Do not discard
the packaging material, as it will be needed for future drum disposal.
Note that the ends of the drum are identical; there is no front or back end.
Wipe inside the endcaps of the drum with a cloth to ensure that they are
clean.
CAUTION
Exposing the drum to light shortens its life. Do not expose the drum to
direct sunlight, and install it within five minutes. When removing the
drum from its packaging, do not touch the surface of the drum, because
fingerprints and scratches can damage the surface and cause poor print
quality.
19. Using both hands, carefully slide the drum onto the drum auxiliary rod.
When the drum reaches the area where the auxiliary rod connects to the
drum shaft, lift the drum very slightly over the connection. Then let the
drum rest on the rubber rollers as you gently guide it into the printer.
CAUTION
The drum must rest on the rubber rollers to avoid being scratched.
20. When the drum is fully inserted into the printer, the end of the drum will be
slightly recessed relative to the front of the printer. At this point, the rubber
guide rollers should be visible. Slightly lift the drum up off of the rubber
rollers and rotate the drum by hand while applying inward pressure, until
the drum moves slightly farther into the printer and locks in place.
CAUTION
In order to position the drum slot and the drum shaft pin, push the drum
in all the way to the back and rotate it until you feel it drop in place.
Failure to lock the drum in place properly can cause severe damage to
the printer.
Never force the drum onto the shaft. If it feels as though the drum is not
seating properly, remove the drum and inspect the shaft for foreign
material or burrs.
21. Remove the drum auxiliary rod from the drum shaft.
22. Reinstall the nut and tighten it securely by hand on the drum shaft.
23. Reinstall the lower inner cover and secure it with the two screws you
removed from it earlier.
24. Reinstall the drum plate and tighten the thumbscrews. While installing the
drum plate, place your thumb over the copper grounding clip and hold it in
place. Otherwise the grounding clip can be bent, making no contact with
the drum shaft.
25. After installing the drum plate, visually verify good electrical contact
between the copper grounding clip and the end of the drum shaft.
Alternatively, measure the resistance. Connect one lead of an ohmmeter
to the bracket on the drum plate, and touch the other lead to the edge of
the drum. Normal resistance should be 0
Ω
.
26. Reinstall the developing unit. (See the
User’s Manual
.)