Toshiba e-Studio250 Troubleshooting of Image, Uneven pitch and blur Symptoms, Feeding direction

4.2 Troubleshooting of Image

(1)Uneven pitch and blur <Symptoms>

Condition	Location	Phenomenon
All modes	Occurs cyclically at right angles to	Uneven pitch
	paper feeding direction

Feeding direction

			Cause
Defect area	Step
		Main-Classification	Sub-Classification	Specific-Classification
—	1	—	—	—

Abnormal paper	2	Paper transport speed in	Low speed	Registration roller aging
transport speed		registration section		change
			Low speed	Registration roller life
				worn out
Drum drive system	3	Drum	Surface condition	—
				Damage
				Attached foreign matter
	4	Main drive gear assembly	Installation condition	—
		Drum Drive Gear	Damaged	—
			Deformation	—
Laser scanner unit	5	Polygonal mirror	Surface inclined	Deformation

e-STUDIO160/200/250 TROUBLESHOOTING 4 - 58 December 2002 TOSHIBA TEC