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e-STUDIO3511/4511 TROUBLESHOOTING 5 - 100 November 2003 © TOSHIBA TEC
Step
1
2
3
4
5
Main
Classification
Drum rotation
Main motor
rotation speed
Drum coupling
Transfer belt
Transfer belt
home position
sensor
Drive roller
Large driving
load
Grounding
(transfer belt
unit)
Reflection
mirror warp
fθ lens charac-
teristic defect
High-voltage
supply terminal
(1st/2nd
transfer rollers)
Section
Drum drive system
Transfer belt
system
Laser optical unit
High-voltage
transformer
Check Item
Output the built-in pattern on A3/LD.
Check main motor operation in the
Test Mode (03).
Check main motor operation in the
Test Mode (03).
Recheck values set for main motor
rotation speed.
Check the grid pattern.
Check the grid pattern.
Check the condition of transfer belt
edge.
Check the grid pattern.
Check the condition of roller surface.
Check the installing of the transfer belt
unit.
Check the grid pattern.
Check the grid pattern.
Check the connection of the terminal.
Phenomena
Color
deviation
White void
Color
deviation
Original mode
All modes
Text Mode
Text/Photo Mode
Photo Mode
Map Mode
Location
Color blurred in outline of
white text or illustration
on a colored background
Outline in black text on a
colored background
Color blurred in outline of
line or text
Specific
Classification
Motor abnormal
Control circuit
abnormal
Adjustment
error
Stain
Damage
Stain
Peeling
Sub
Classification
Unstable
Inadequate
Loose coupling
Damage
Deformation
Deformation or
damage
Reflection tape
Stain
Slipping
Cleaning blade
A B C
A B C
A B C
A B C
A B C
A B C
5.2 Troubleshooting of Image
(1) Color deviation
<Symptoms>
▲ ▲ ▲
Cause
Fig. 5-201