Oki MC770 series Maintenance Manual - page 33

45376001TH  Rev.1 

32 /

Oki  Data  CONFIDENTIAL

2.  Operating instructions

General of color blur correction

The color blur correction is operated by reading the pattern for correction printed on the 

belt with a sensor set in the sensor shutter under the belt unit. 

The pattern is detected by this sensor, and the correction is operated.

Color blur correction auto-start timing

•฀ When฀the฀power฀is฀on

•฀ When฀the฀cover฀is฀closed฀after฀the฀cover฀is฀opened฀once

•฀ When฀more฀than฀400฀copies฀are฀printed฀or฀when฀more฀than฀6฀hours฀have฀elapsed฀

since the last print

•฀ The฀Sleep฀mode฀has฀no฀color฀blur฀correction฀auto-start฀timings.

The amount of toner of the pattern, the toner left on the sensor and the open-close 

trouble of the shutter etc. may lead to correction error. However, as the error message 

may not display even if the error is occurred, it is necessary to perform the color blur 

correction (see 5.3.2.6) by the utilization of the self-diagnostic mode and confirm the error 

display.

Right color blur correction pattern

Left color blur correction pattern

Color blur sensor

Color blur sensor

Belt waste toner box

Belt cleaning blade

Color blur sensor

Transport belt

Sensor shutter