Dropouts; Black Dots; Black Horizontal Streaks - Kyocera FS-1100 Service Manual

(3) Dropouts.

Print example
Defective developing roller (develop-
ing unit).
ABC
123
Defective drum unit.
Defective fuser unit (heat roller or
press roller).
Defective paper specifications.
Defective transfer roller installation.
Defective transfer bias output.

(4) Black dots.

Print example
Defective drum unit or developing
unit.
ABC
123

(5) Black horizontal streaks.

Print example
Defective drum unit's ground.
ABC
123
Defective drum unit.
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Causes
If the defects occur at regular intervals of 62.8 mm/2
page 2-4-3), the problem may be the damaged developing
roller (in the developing unit). Replace the developing unit
(See page 1-5-11).
If the defects occur at regular intervals of 94 mm/3
page 2-4-3), the problem may be the damaged drum (in the
drum unit). Replace the drum unit (See page 1-5-12).
If the defects occur at regular intervals of 73.162 mm/2
78.5 mm/3
damaged heat roller or press roller (in the fuser unit). Replace
fuser unit (See page 1-5-16).
Paper with rugged surface or dump tends to cause dropouts.
Replace paper with the one that satisfies the paper specifica-
tions.
The transfer roller must be supported by the bushes at the
both ends. Clean the bush to remove oil and debris. Replace
the transfer roller if necessary (See page 1-5-14).
Replace the high voltage PWB or control PWB (See page 1-5-
25 or 1-5-19).
Causes
If the defects occur at regular intervals of 94 mm/3
page 2-4-3), the problem may be the damaged drum (in the
drum unit). Replace drum unit (See page 1-5-12).
If the defects occur at random intervals, the toner may be leak-
ing from the developing unit or drum unit. Replace the devel-
oping unit or drum unit (See page 1-5-11 or 1-5-12).
Causes
Check that the drum shaft and the grounding tab (printer) are
in good contact. Apply the grounding tab a small amount of
electroconductive grease as required.
Replace the drum unit (See page 1-5-12).
Check procedures/corrective measures
" (See page 2-4-3), the problem may be the
1/16
Check procedures/corrective measures
Check procedures/corrective measures
2H5/2HS
" (See
1/2
" (See
11/16
", or
7/8
" (See
11/16
1-4-11