Toshiba e-STUDIO 5540C Service Manual page 1074

Cause/Section Step
Transfer unit 12
13
14
15
16
Fuser unit 17
Drum 18
Laser optical 19
unit
(*1): Decrease the corresponding 2nd transfer bias output as follows depending on what happened,
and check if the residual image has changed and adjust the value accordingly.
Front side, color mode
Decrease the value of the code 05-2934-0 to -9 by 1 while you are checking how the streaks have
changed.
Back side, color mode
Decrease the value of the code 05-2935-0 to -9 by 1 while you are checking how the streaks have
changed.
Front side, black mode
Decrease the value of the code 05-2936-0 to -9 by 1 while you are checking how the streaks have
changed.
Back side, black mode
Decrease the value of the code 05-2937-0 to -9 by 1 while you are checking how the streaks have
changed.
e-STUDIO5540C/6540C/6550C/5560C/6560C/6570C
ERROR CODE and TROUBLESHOOTING
Check item
Are the harness or foreign matters in
contact with the transfer belt surface?
Is there paper dust on the edge of
transfer belt cleaning blade?
Is the transfer belt cleaning blade in
proper contact with the transfer belt?
Is the paper mode correct for the
paper in use?
Is the bias output dependent on the
2nd transfer bias?
a. Is there dirt or scratches on the
fuser belt and pressure roller.
b. Is the thermistor dirty?
Are there scratches on the drum
surface?
Is there foreign matter or dust on the
slit glass?
Correct or remove them.
Clean or replace the transfer belt
cleaning blade.
Take off the transfer belt and check if
the transfer belt cleaning blade
pressure spring is installed properly.
Set the correct paper mode. If streaks
still appear in the correct paper mode,
follow step 16.
Perform the following (*1) adjustment
(05 mode).
a. Clean or replace them.
b. Clean the thermistor.
Replace the drum.
Remove foreign matter or dust.
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Measures