Trouble Shooting

Step	Cause	Solution	Parts
1	Dirt in the paper path.	Wipe off the dirt. Refer to < The Spacing of Various Rollers in the Image >Table (see below).
2	Develop unit defective.	Replace the develop unit.	Develop unit (015-0204-21)
3	Drum unit defective.	Replace the drum unit.	Drum (015-0289-21)
4	HVPS (High-Voltage Power Supply) defective.	Replace HVPS.	HVPS (005-3141-9-SP)

The spacing of various rollers in the image

Periodic image defects can be caused by defects in various rollers. Refer to the table below to determine the cause of the defect based on the diameter of the various rollers or the spacing in the image.

The name of the part	The spacing in the image
Pickup roller (manual tray)	97.38 mm
Transfer roller (drum unit)	56.54 mm
Drum unit roller (drum unit)	94.2 mm
Heating roller (fuser)	81.68 mm
Pressure roller (fuser)	94.2 mm
Develop roller (develop unit)	49.0 mm
Regulation roller (develop unit)	143.0mm
Supply roller	36.0mm