Kyocera C5020N - FS Color LED Printer, Service Manual

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2F3/2F4
1-5-29
(7) White streaks are printed
vertically.
Causes
1. Defective LED print head output.
2. Defective main charging output.
3. Foreign object in one of the developers.
4. Adhesion of soiling to primary transfer belt.
Causes Check procedures/corrective measures
1. Defective LED print head output.
A. Poor insertion of LED cleaner.
Check if the LED cleaner unit is properly seated. If necessary, reseat it
properly.
B. Dirty SELFOC lens of LED print head.
Clean the SELFOC lens of LED print head by using lens cleaner.
C. Focus is lost with the LED print head.
Check the four colors of image by using the test print of service mode. If
the defect appears on a particular color, replace the LED print head for
that color. See page 1-4-14, 1-6-15).
D. Defective LED print head.
Check the four colors of image by using the test print of service mode. If
the defect appears on a particular color, replace the LED print head for
that color. See page 1-4-14, 1-6-15).
2. Defective main charging output.
A. Adhesion of oxide to main charger wire.
Clean the main charger wire by using main charger wire cleaner.
B. Dirty main charger grid.
Clean the main cherger grid by using main charger grid cleaner.
C. Dirty main charger shield.
Replace the main charger unit.
3. Foreign object in one of the developers.
Check the image by using the test print of service mode. If the white line
appears on a particular page, replace the developer for that color (See
page 1-4-14, 1-6-12).
4. Adhesion of soiling to primary transfer
belt.
Replace the primary transfer unit. See page 1-6-22.