Image Skew Correction Control - Canon imageRUNNER ADVANCE C5500 Series Service Manual

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Table of Contents

Related Error Code

• E0112-0000: Home position of the Laser Shutter was not detected.

• E0112-0001: Home position was not detected although the Laser Shutter was closed.

• E0112-0002: Change in home position was not detected while the Laser Shutter was open.

Image Skew Correction Control

This control is performed to prevent displacement in laser exposure.

Execution timing

• At power-on

• At [Auto Correct Color Mismatch] is executed

Control description

1. The DC Controller forms the patch pattern of each color on the ITB.

2. The DC Controller reads this patch pattern with the patch sensor to detect the degree of color displacement in comparison

with the reference value backed-up in the DC Controller.

3. Based on this detection result, the laser exposure position (skew amount) of the Laser Scanner Unit is changed.

Imaging Lens

Scanner Mirror

Skew Correction Motor

Before correction

After correction

Imaging Lens

Photosensitive Drum

Position relation of

imaging lens and arm

Imaging Lens

Photosensitive Drum

Position relation of

imaging lens and arm

Imaging Lens

2. Technology

Imaging Lens

Imaging Lens