Troubleshooting For The Image; Color Deviation - Toshiba e-STUDIO 5540C 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
Cause/Section Step
1
2
3
Poor transport 4
of the belt of
the transfer
belt unit
e-STUDIO5540C/6540C/6550C/5560C/6560C/6570C
ERROR CODE and TROUBLESHOOTING
Location
Check item
Perform the Forced
performing of color
registration control
adjustment (05-4719).
Output the built-in grid
pattern in A3/LD size.
(Perform [8][FAX] at 05
startup.)
Check the direction and
tendency of the grid pattern
deviation.
Is the surface of the 2nd
transfer facing roller of the
transfer belt unit dirty or worn
out?
Phenomena
Color
deviation
White void
Color
deviation
Measures
Has it ended normally?
When CA00 occurs:  Proceed
to [CA00] troubleshooting.
Perform steps 1 and 2 several
times and check the direction and
tendency of the grid pattern
deviation.
i) When evenly deviated in the
transfer direction, and when
deviated in a regular manner
such as in the order of Y, M, C, K
or K, C, M, Y:
 Perform steps 4, 5, 6 and 7.
ii) When evenly deviated in the
laser scanning direction:
 Perform steps 8, 9 and 10.
iii) When cyclically deviated in the
transfer direction:
 Perform steps 11, 12, 13,
14 and 15.
iv) When laser scanning lines are
curved:
 Perform steps 16.
v) When the deviation amount in
the transport direction is different
between the start point and the
end point of the scanning
direction:
 Perform steps 17.
Clean or replace the 2nd transfer
facing roller.
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Fig.8-7
Fig.8-8
Fig.8-9
Remarks