Oki C5500 Maintenance Manual page 30

Outline of color drift correction
The color drift correction is implemented reading the correction pattern that is printed on the belt
with the sensor located inside the sensor shutter under the belt unit. This sensor is used to detect
and correct the pattern.
Automatic start timing of color drift correction:
• At power-on
• When the cover is closed after it is opened briefly
• When 400 pages or more have been printed since previous execution
A correction error may be issued due to an inadequate toner amount of the pattern generated,
a sensor stained with toner, deficient opening/closing of the shutter, or for other reasons.
However, even if an error is issued, it is not indicated on the operator panel. Therefore,
forcible color drift correction will have to be performed in the self-diagnostic mode (Subsection
5.3.2.6) to check the error indication.
Belt motor
43085101TH Rev.1
Sensor shutter
Color drift sensor
Color drift sensor
Right color drift correction pattern
Left color drift correction pattern
Color drift sensor
Oki Data CONFIDENTIAL
Belt waste toner box
Belt cleaning blade
Transport belt
30 /