Toshiba e-STUDIO5540C Service Manual page 338

8.5.30 Residual image
Type A
Approx 188mm
2 types (A and B) of residual images are identified. The common phenomenon is an image fused on the
photoconductive drum one round before appears faintly on the halftone part of the next image.
Cause/Section Step
Main charger 1 Is the connector of each discharge
LED securely connected?
2 Is any of the discharge LED dirty?
Drum 3 Has any of the drums reached its PM
life?
Transfer belt 4 Is the transfer belt unit properly
unit (mainly the installed?
cause of type
5 Is the transfer belt contacting with the
B)
drum properly?
6 Is the power supply spring on the rear
side of the transfer belt unit
deformed?
7 Is the bias output dependent on the
1st transfer bias?
* Decrease the corresponding 1st transfer bias output as follows according to the phenomena which
occurred, and check if the residual image has changed and adjust the value accordingly.
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<Correct image>
Type B
Feeding
direction
Fig.8-38
Check item
8 - 337
Approx 188mm
Measures
Reconnect it securely.
Clean it.
Replace it.
Check and reinstall it properly.
Check if the transfer belt is at the
releasing position
Check if there is any damage to the
bracket of the 1st transfer roller.
Correct it.
Refer to the explanation below.*
e-STUDIO5540C/6540C/6550C/5560C/6560C/6570C
ERROR CODE and TROUBLESHOOTING
Feeding
direction
8