Printronix L5520 - Manual (Page 127)

Installing The Photoreceptor Drum
127
CAUTION The drum must rest on the rubber rollers to avoid being
scratched.
3. When the drum is fully inserted into the printer, the end of the
drum is slightly recessed relative to the front of the printer, and
the rubber guide rollers should be visible. Slightly lift the drum
up off 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
severely damage 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.
4. Unscrew the drum auxiliary rod from the drum shaft.
5. Install the nut on the drum shaft and tighten it securely by hand.
6. Install the drum plate and tighten the thumbscrews. While
installing the drum plate, hold the copper grounding clip with
your thumb. Otherwise the grounding clip can be bent, and
cannot make contact with the drum shaft.
7. 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
.
8. Install the developing unit.
9. Raise the transport unit by turning the green lever on the
transport unit to the right.
10. Close the waste toner recovery unit and ensure that it latches.
11. Close the printer upper doors.