Dropouts - Kyocera Ecosys FS-600 Service Manual

Dropouts

Symptom
Note the spacing of the defects. Use the
Repetitive defect gauge on page6-43.
Check paper for property.
Check the paper chute installation.
Check the transfer roller installation.
Check the transfer bias potential.
Suggested remedy
•
If the defects occur at regular intervals of 19.96 mm, the
problem may be a damaged magnet roller (in the Process
unit). Replace the Process unit.
•
If the defects occur at regular interval of 94.25 mm, the
problem may be a damaged drum in the Process unit; and the
fuser unit if the intervals is 56.10 or 62.82 mm. Replace the
drum unit or fuser unit accordingly. Refer to page 6-33 for
details.
Paper with rugged surface or dump tends to cause this type of
failure.
The paper chute (the metallic fixture provided between the
transfer roller and the fuser unit for antistatic purpose) must not
be fit loose. Press the paper chute down firmly if necessary.
The transfer roller must be supported by the axle holders at two
ends. Clean the axle holder to remove oil and debris. Replace
the transfer roller if necessary.
Check the transfer bias output on the high-voltage (KP-543)
board. This requires removal of the left side cover and the test
equipment: For information, contact Kyocera. Replace the high-
voltage board if high voltage potential is not available on the
board.
6-28
Troubleshooting
Print quality problems
FS-600/FS-680