HP LaserJet II Serie Manual De Instrucciones página 226

HP 33440/HP 33449 COMBINED SERVICE MANUAL
2. Beam-to-Drum
Mirror incorrectly
instiled.
3. Bent Top Cover
Assembly Hinge
Brackets.
POSSIBLE- GA@Ski
1. Worn Feed Roller
Assembly.
2.
Registration
Assembly.
3. Drive Gears.
4.
Paper Tray.
5.
Paper.
Table 7-27. Right-Hand Text Missing/Distorted
No toner available for print.
The Beam-to-Drum Mirror reflects
the laser light from the scanner's
polygonal mirror to the surface of the
photoconductive drum. If the mirror is
instiled incorrectly (end-for-end) or is
not fully resting on the mirror supports,
the scan plane of the laser will not be
parallel. The resulting image written on
the drum will be distorted, missing, or
out of parallel fllgnment.
Replace the EP-S Cartridge.
Verify that the mirror is resting
firmly on the moulded plastic
supports. Note that the mirror
is spring loaded and should rest
squarely on the supports. If
the mirror had been removed
during maintenance, ensure
that the mirror has been
correcfly reinstiled. Refer to
Chapter 6 for proper mirror
instigation.
If the Top Cover Assembly Hinge Replace the Top Cover
Brackets are bent the Beam-to-Drum
Assembly Hinge Brackets.
Mirror will not reflect the laser beam to
the drum properly.
Table 7-28. Faulty Registration
If the Paper Pickup Roller or associated
clutch is sufficiently worn, the leading
edge of the paper may not reach the
Registration RoNers in time.
The Paper Pickup Roller positions
the leading edge of the paper at the
Registration Rollers. If these rollers
do not grab the paper at the proper
time and move it smoothly through the
printer (due to worn rollers, springs, or
clutch), misregistration will occur.
If any gear within the gear drive
train becomes excessively worn or
is excessively dirty, erratic paper
movement would result leading to
image misregistration.
The paper tray may be preventing the
paper from freely moving through the
printer.
The surface of the paper maybe too
smooth for the pickup roller to move
the paper through the paper path.
Replace the Registration
Assembly.
Closely examine the gears
along the paper path for wear
and contamination. Clean and
inspect the gears. Replace any
defective gear.
Replace the paper tray.
Change paper. Refer to the
Paper Specifications Guide or
Chapter 2, Section 2-4 ("Paper
Specifications").
7-62