1-4-73
(7) Streaks are printed horizontally.
(8) A part of image is dark or light.
Print example
Causes
Check procedures/corrective measures
Dirty or flawed drum.
Perform the drum refresh operation.
Flawed drum. Replace the drum unit (see page 1-5-21).
Dirty developer section.
Clean any part contaminated with toner in the developer
section.
Poor contact of grounding ter-
minal of drum unit.
Check the installation of the drum unit. If it operates incor-
rectly, replace it (see page 1-5-21).
Print example
Causes
Check procedures/corrective measures
Defective exposure lamp.
Replace the LED PWB (see page 1-5-37).
One-side-only closure of the
right cover.
Close the right over again.
The transfer unit is not prop-
erly attached.
Reattach the transfer roller. Or replace the transfer roller
unit.
The developer unit is sepa-
rated from the drum unit.
Clean the developer pulley. Or replace the developer unit.
Clean the Drum. Or relpace the drum unit.
Dirty laser scanner unit dust
shield glass.
Perform the laser scanner unit dust shield glass cleaning.
Print example
Causes
Check procedures/corrective measures
Dirty contact glass.
Clean the contact glass.
Dirty or flawed drum.
Perform the drum refresh operation.
Flawed drum. Replace the drum unit (see page 1-5-21).
Dirty or flawed chager roller.
Clearn the chager roller.
Or replace the chager roller unit (see page 1-5-23).
Deformed or worn cleaning
blade in the drum unit.
Replace the drum unit (see page 1-5-21).
Flawed developer roller.
Replace the developer unit (see page 1-5-18).
Dirty heat roller and press
roller.
Clean the heat roller and press roller.
Y11
8
240-1
Service Manual
Summary of Contents for d-Copia 3002MF plus
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Page 646: ...PF 791 500 x 2 Paper feeder Installation Guide...
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