Kyocera DISCOVER FS-3830N, Service Manual

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2FP/2FY/2FR-2
1-5-20
Causes Check procedures/corrective measures
1. Defective laser scanner unit
2. Defective engine controller circuit in the
engine board
Defective polygon motor in the laser scanner unit. Replace the laser
scanner unit. See page 1-6-35.
Replace the engine board (KP-1081). See page 1-6-20.
(10) Undulated printing at
the left edge (scan-
ning start position).
Causes
1. Defective laser scanner unit
2. Defective engine controller circuit in the engine board
Causes Check procedures/corrective measures
1. Toner contamination in various parts
2. Defective transfer roller
Dirty edges and back of the paper can be caused by toner
accumulated on such parts as the paper chute, paper transportation
paths, the bottom of the drum and developer, and the fuser unit inlet.
Clean these areas and parts to remove toner.
If the transfer roller is contaminated with toner, clean the transfer
roller using a vacuum cleaner or by continuously printing a low-
density page until the symptom has faded away.
(9) Dirt on the top edge
or back of the paper.
Causes
1. Toner contamination in various parts
2. Defective transfer roller
ABC
123
This vertical
line should
be straight.