Kyocera FS C5020N - Color LED Printer Service Manual page 81

(7) White streaks are printed
vertically.
Causes
1. Defective LED print head output.
A. Poor insertion of LED cleaner.
B. Dirty SELFOC lens of LED print head.
C. Focus is lost with the LED print head.
D. Defective LED print head.
2. Defective main charging output.
A. Adhesion of oxide to main charger wire.
B. Dirty main charger grid.
C. Dirty main charger shield.
3. Foreign object in one of the developers.
4. Adhesion of soiling to primary transfer
belt.
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.
Check procedures/corrective measures
Check if the LED cleaner unit is properly seated. If necessary, reseat it
properly.
Clean the SELFOC lens of LED print head by using lens cleaner.
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).
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).
Clean the main charger wire by using main charger wire cleaner.
Clean the main cherger grid by using main charger grid cleaner.
Replace the main charger unit.
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).
Replace the primary transfer unit. See page 1-6-22.
2F3/2F4
1-5-29