e-STUDIO3511/4511 TROUBLESHOOTING 5 - 106 November 2003 © TOSHIBA TEC
Step
1
2
3
4
5
6
(2) Uneven pitch and jitter image<Symptoms> Feeding
direction
Check Item
Output the built-in halftone and grid
patterns on A3/LD.
Check the halftone pattern.
Check the drum surface.
Check the drum surface.
Check main motor operation in Test
Mode (03).
Check main motor operation in Test
Mode (03).
Recheck values set for main motor
rotation speed.
Check the halftone pattern.
Check the halftone pattern.
Check the halftone pattern.
Check the condition of transfer belt edge.
Check the halftone pattern.
Check the condition of roller surface.
Check the halftone pattern.
Specific
Classification
Damage
Attached
foreign matter
Motor abnormal
Control circuit
abnormal
Adjustment
error
Tension
looseness
Stain
Peeling
Deformation
Main
Classification
Drum
Drum rotation
Main motor
rotation speed
Drum coupling
Drive unit
Transfer belt
Drive roller
Large driving
load
Polygonal
mirror
Sub
Classification
Surface
condition
Unstable
Inadequate
Loose coupling
Damage
Deformation
Timing belt
Deformation or
damage
Slipping
Cleaning blade
Surface inclined
Section
Drum drive system
Transfer belt
system
Laser optical unit
Cause
Phenomena
Uneven
pitch
Original mode
All modes
Location
Occurs cyclically at right
angles to paper feeding
direction
Fig. 5-203