Canon imageRUNNER ADVANCE C5051 Series Service Manual page 76

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Technology■>■Laser■Exposure■System■>■Various■Controls■>■Image■tilt■correction■control
Laser shutter position
Relation of shutter lever and cam
For Bk For color For Bk
Close Close
Shutter
Lever
Shutter Cam
Laser
Shutter
Open
Close
Open Open
Related■error■code■
E0112-0000:■Laser■shutter■motor■error■(not■in■home■position)
If■the■Laser■Shutter■Sensor■(PS29)■is■not■in■the■home■position■at■initial■operation.
E0112-0001:■Laser■shutter■motor■error■(operation■failure■at■shutter■close)
If■the■Laser■Shutter■Sensor■(PS29)■is■not■in■the■home■position■after■approx.■10■sec■from■the■
shutter■close■operation.■
E0112-0002:■Laser■shutter■motor■error■(operation■failure■at■shutter■open)
If■the■Laser■Shutter■Sensor■(PS29)■is■still■in■the■home■position■after■approx.■10■sec■from■the■
shutter■open■operation.
2 Technology■>■Laser■Exposure■System■>■Various■Controls■>■Image■tilt■correction■control
Sensor lever position
For color
(PS29)
Sensor
Lever
F-2-58
■ Image■tilt■correction■control ■
● Purpose
■
This■is■to■prevent■the■gap■of■laser■emission.
● Execution timing ■
At■power-ON,■per■total■360■sheets■printing
● Execution time ■
Approx.■3■sec
● Control detail ■
1)■DC■Controller■creates■the■patch■pattern■of■each■color■on■the■ITB.
2)■DC■Controller■compares■the■patch■pattern■with■the■standard■value■backed■up■in■the■
DC■Controller■by■reading■this■patch■pattern■at■the■Patch■Sensor■and■detects■the■color■
displacement■amount.
3)■Based■on■the■foregoing■detection■result,■the■laser■emission■position■(tilt■degree)■of■Laser■
Scanner■Unit■is■changed.
2-40
2-40