Kyocera FS-C5015N Service Manual page 78

2HJ/2HK
(6) The background is colored.
Print example
Defec-
tive
develop-
ing
sleeve
bias out-
put.
Defective primary transfer cleaning
unit.
Defec-
tive color
calibra-
tion.
(7) White streaks are printed vertically.
Print example
Defec-
tive LED
print
head
output.
Defec-
tive main
charg-
ing out-
put.
Foreign object in one of the develop-
ers.
Adhesion of soiling to primary transfer
belt.
1-4-26
Causes
Defective developer.
Defective bias high volt-
age PWB.
Defective engine control-
ler PWB.
Defective main controller
PWB.
Defective drum unit.
Dirty sensing surface of
the toner ID sensor.
The printer environment
considerably changed
since an automatic cali-
bration was made.
Causes
Poor insertion of LED
cleaner.
Dirty SELFOC lens of LED
print head.
Focus is lost with the LED
print head.
Defective LED print head.
Adhesion of oxide to main
charger wire.
Dirty main charger grid.
Dirty main charger shield.
Check procedures/corrective measures
Check the four colors of image by using the test page of ser-
vice mode. If the defect appears on a particular color, replace
the developer for that color. See pages 1-3-14 and 1-5-12.
Replace the bias high voltage PWB. See page 1-5-46.
Replace the engine controller PWB (A0004). See page 1-5-41.
Replace the main controller PWB (A0171). See page 1-5-40.
Replace the drum unit. See page 1-5-13.
Replace the primary transfer cleaning unit. See page 1-5-24.
Clean the sensing surface of the toner ID sensor.
Perform the color calibration of service mode. See page 1-3-
14.
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 page of ser-
vice mode. If the defect appears on a particular color, replace
the LED print head for that color. See pages 1-3-14, 1-5-15.
Check the four colors of image by using the test page of ser-
vice mode. If the defect appears on a particular color, replace
the LED print head for that color. See pages 1-3-14, 1-5-15.
Clean the main charger wire by using main charger wire
cleaner.
Clean the main charger 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 pages 1-3-14 and 1-5-12.
Replace the primary transfer unit. See page 1-5-22.