2MF/2MG
1-4-18
(3) Dropouts.
(4) Black dots.
(5) Black horizontal streaks.
Print example
Causes
Check procedures/corrective measures
Defective developing roller
(developing unit).
If the defects occur at regular intervals of 39 mm/1
9/16
"
(see page 2-4-3), the problem may be the damaged devel-
oping roller (in the developing unit). Replace the develop-
ing unit (see page 1-5-25).
Defective drum unit.
If the defects occur at regular intervals of 94 mm/3
11/16
"
(see page 2-4-3), the problem may be the damaged drum
(in the drum unit). Replace the drum unit (see page 1-5-
26).
Defective fuser unit (heat
roller or press roller).
If the defects occur at regular intervals of 82 mm/3
1/4
", or
93 mm/3
11/16
" (see page 2-4-3), the problem may be the
damaged heat roller or press roller (in the fuser unit).
Replace fuser unit (see page 1-5-29).
Defective paper
specifications.
Paper with rugged surface or dump tends to cause drop-
outs. Replace paper with the one that satisfies the paper
specifications.
Defective transfer roller instal-
lation.
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 1-5-27).
Defective transfer bias output. Replace the engine PWB (see page 1-5-30).
Print example
Causes
Check procedures/corrective measures
Defective drum unit or devel-
oping unit.
If the defects occur at regular intervals of 94 mm/3
11/16
"
(see page 2-4-3), the problem may be the damaged drum
(in the drum unit). Replace drum unit (see page 1-5-25).
If the defects occur at random intervals, the toner may be
leaking from the developing unit or drum unit. Replace the
developing unit or drum unit (see page 1-5-25 or 1-5-26).
Print example
Causes
Check procedures/corrective measures
Defective drum unit's ground.
Defective drum unit's ground. The contact (spring) in the
drum unit and its counter part, the drum grounding terminal
in the printer, must be in a good contact.
See page 1-4-16, refer to figure 1-4-5
Defective drum unit.
Replace the drum unit (see page 1-5-26).
ABC
123
ABC
123
ABC
123
Summary of Contents for ECOSYS FS-3040MFP+
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