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Installing The Photoreceptor Drum
47
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 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 may
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 any 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 in
place with your thumb. Otherwise the grounding clip can be
bent, making no 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. (See page 56.)
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.