FC-22
TROUBLESHOOTING
4 - 54
January 2000 © TOSHIBA TEC
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A B C
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4.2 Troubleshooting of Image
(1) Color deviation
<Symptoms>
Condition
Location
Phenomena
All modes
White void areas, color blur
Color
deviation
Text mode
Black text outlines in color
White void
Text/Photo mode
background
Photo mode
Color blur in outline of line
Color
Map mode
or text
deviation
Defect area
Step
Cause
Check Item
Main-Classification Sub-Classification Specific-Classification
1
Output build-in grid pattern on A3/LD.
Color registration
2
Control error or
Check grid pattern.
Control
poor optimization
Abnormal paper
3
Paper transport
Low speed
Adjustment defect
Check grid pattern.
transport speed
speed in
registration section Low speed
Registration roller
aging change
Low speed
Registration roller
Check condition of registration rubber roller
life worn out
surface.
High speed
Adjustment defect
Check grid pattern
4
Paper transport
High speed
Adjustment defect
Check grid pattern.
speed in fuser unit
Feed the paper with the front door open and
check the paper transport between transfer
belt and fuser unit.
No defect in normal paper mode, but in thick
paper 3 mode, deviation occurs in order (Y)
MCK, at trailing edge of A3/LD sheet.
Drum drive system
5
Drum rotation
Unstable
Motor abnormal
Run operation check in test mode.
Control circuit
Run operation check in test mode.
abnormal
Drum motor
Inadequate
Adjustment defect
Re-check values set for drum motor rotation
rotation speed
speed.
Drum coupling
Loose coupling
Check grid pattern.
Damage
Deformation
Transfer belt system
6
Transfer belt
Deformation or
Check grid pattern.
damage
Check condition of transfer belt edge
Drive roller
Slipping
Stain
Check grid pattern.
Check condition of roller surface.
Large driving load
Used toner
Over capacity
Check grid pattern.
Cleaning blade
Peeling
Laser optical unit
7
Tilt adjustment
Adjustment mech-
Check grid pattern.
mechanism
anism defect
Reflection mirror
Check grid pattern.
warp
f
θ
lens characteris-
Check grid pattern.
tic defect
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Summary of Contents for FC22
Page 115: ...FC 22 PREVENTIVE MAINTENANCE 2 8 January 2000 TOSHIBA TEC Front side drive system 47 20 ...
Page 121: ......
Page 235: ...January 2000 TOSHIBA TEC 5 29 FC 22 FIRMWARE UPDATING ...
Page 237: ...FC 22 SERVICE HANDBOOK 6 WIRE HARNESS CONNECTION DIAGRAMS 6 2 DC Wire Harness ...
Page 238: ...FC 22 WIREHARNESS CONNECTION DIAGRAMS 6 3 January 20000 TOSHIBA TEC ...