Oki C810 Maintenance Manual page 24

Oki Data CONFIDENTIAL
Outline of color registration correction
The color registration is corrected by reading correction patterns that are printed on the
belt with the color registration sensors located inside the sensor shutter under the belt unit.
These sensors are used to detect and correct color registration.
Automatic start timing of color registration correction
• At power-on
• When the cover is closed after it is opened for five seconds or more
• When 400 pages or more have been printed after the previous correction
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 registration correction will have to be performed in the self-diagnostic
mode (section 5.3.2.6) to check the error indication.
44072903TH Rev.1
Belt waste toner box
Sensor shutter
Color registration sensor
Color registration sensor
Right color registration correction pattern
Left color registration correction pattern
Color registration sensor
2. DESCRIPTION OF OPERATION
Transport belt
Belt cleaning blade
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