Kyocera FS-2020D Service Manual page 54

2J0/2J1/2J2
(8) Gray background.
Print example
(9) Dirt on the top edge or back of the paper.
Print example
(10) Undulated printing at the left edge (scanning start position).
Print example
This vertical
line should
be straight.
1-4-14
Downloaded from www.Manualslib.com
Causes
Print density setting.
Defective drum surface potential.
Defective main charger unit.
Defective developing roller (develop-
ing unit).
Causes
Toner contamination in various parts.
Defective transfer roller.
Causes
Defective polygon motor (laser scan-
ner unit).
Defective engine PWB.
manuals search engine
Check procedures/corrective measures
The print density may be set too high. Try adjusting the print
density. For details refer to the printer's operation guide.
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).
Replace the main charger unit (See page 1-5-13).
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).
Check procedures/corrective measures
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.
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.
Check procedures/corrective measures
Replace the laser scanner unit (See page 1-5-38).
Replace the engine PWB (See page 1-5-25).