Color Deviation - Toshiba e-STUDIO 2555C Service Manual

8.5 Troubleshooting for the Image
8.5.1

Color deviation

1) Color deviation
<Symptoms>
Original mode
All modes Color blurred in outline of white
text or illustration on a colored
background
Text Mode Outline in black text on a colored
Text/Photo background
Mode
Photo Mode Color blurred in outline of line or
Map Mode text
Ste
Cause/Section
p
1 Perform the Forced performing
of color registration control
adjustment (05-4719).
2 Test printing (A3/LD)
Drum rotation 3 Check the drum motor operation
abnormality in the test mode (03) to see if
there is any rotation abnormality
of the drum.
4 Check the drum TBU motor
operation in the test mode (03)
to see if there is any rotation
abnormality of the drum.
Inadequate 5 Check the value set for drum
drum TBU TBU motor rotation speed. (Is
motor rotation the value significantly different
speed from the default value?)
Drum coupling 6 Loose coupling, damage,
and coupling deformation
on the
equipment
side
© 2012-2013 TOSHIBA TEC CORPORATION All rights reserved
Location
Color
deviation→
White
void→
Color
deviation→
Check Item
8 - 277
Phenomena
Fig.8-3
Fig.8-4
Fig.8-5
Measure
Has it ended normally?
When CA00 occurs:
→ Proceed to [CA00]
troubleshooting.
Output the built-in grid pattern
Replace the drum TBU motor.
Reconnect the connectors.
Replace the harnesses.
Replace the LGC board.
Reset drum TBU motor speed
to 128.
Check if they are installed
properly or replace the
couplings.
e-STUDIO2555C/3055C/3555C/4555C/5055C
ERROR CODE AND TROUBLESHOOTING
8
Remark
For the
following
checks