Troubleshooting Of Image - Toshiba e-STUDIO160 Service Handbook

4.2 Troubleshooting of Image

(1) Uneven pitch and blur
<Symptoms>
Condition Location
All modes Occurs cyclically at right angles to
paper feeding direction
Defect area Step
— 1
Abnormal paper 2
transport speed
Drum drive system 3
4
Laser scanner unit 5
e-STUDIO160/200/250 TROUBLESHOOTING
Phenomenon
Uneven pitch
Main-Classification
—
Paper transport speed in Low speed
registration section
Low speed
Drum Surface condition
Main drive gear assembly Installation condition
Drum Drive Gear Damaged
Deformation
Polygonal mirror Surface inclined
4 - 58
Feeding
direction
Cause
Sub-Classification Specific-Classification
—
Registration roller aging
change
Registration roller life
worn out
Damage
Attached foreign matter
Deformation
December 2002 TOSHIBA TEC
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