2J0/2J1/2J2
1-4-14
(8) Gray background.
(9) Dirt on the top edge or back of the paper.
(10) Undulated printing at the left edge (scanning start position).
Print example Causes Check procedures/corrective measures
Print density setting. The print density may be set too high. Try adjusting the print
density. For details refer to the printer's operation guide.
Defective drum surface potential. If a drum unit which is known to work normally is available for
check, replace the current drum unit in the printer with the nor-
mal one. If the symptom disappears, replace the drum unit
with a new one (See page 1-5-12).
Defective main charger unit. Replace the main charger unit (See page 1-5-13).
Defective developing roller (develop-
ing unit).
If a developing unit which is known to work normally is avail-
able for check, replace the current developing unit in the
printer with the normal one. If the symptom disappears,
replace the developing unit with a new one (See page 1-5-11).
Print example Causes Check procedures/corrective measures
Toner contamination in various parts. Dirty edges and back of the paper can be caused by toner
accumulated on such parts as the paper chute, paper trans-
portation paths, the bottom of the drum and developing unit,
and the fuser unit inlet. Clean these areas and parts to remove
toner.
Defective transfer roller. If the transfer roller is contaminated with toner, clean the trans-
fer roller using a vacuum cleaner or by continuously printing a
low density page until the symptom has faded away.
Print example Causes Check procedures/corrective measures
Defective polygon motor (laser scan-
ner unit).
Replace the laser scanner unit (See page 1-5-38).
Defective engine PWB. Replace the engine PWB (See page 1-5-25).
This vertical
line should
be straight.
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