Gradation Changes After Shading Correction - Canon imagePRESS C1 P Service Manual

14.3.1.7.7 Gradation changes after shading correction

imagePRESS C1 P / imagePRESS C1 / imagePRESS C1+ (Printer) / imagePRESS C1+
Phenomenon:
After shading correction, gradation may get disordered.
Cause:
In the case that the degree of shading for correction is large, gradation may be disordered because of shading correction.
Action to take in the field:
In the case that the gradation is disordered, users are likely execute auto gradation correction.
In the case of receiving a call from users, ask them to execute auto gradation correction (full correction).
We recommend executing auto gradation correction (full correction) before and after performing shading correction due to the following reasons:
- To improve the accuracy of shading correction
- To ensure gradation performance after shading correction
Flow of corrective operation
1) Execute auto gradation correction (full correction).
[Initial Setup/Save Key] > [System Control Settings] > [Device Management Settings] > [Auto Gradation Correction]
2) Execute shading correction.
[Initial Setup/Save Key] > [System Control Settings] > [Device Management Settings] > [Shading Correction]
3) Execute auto gradation correction (full correction).
[Initial Setup/Save Key] > [System Control Settings] > [Device Management Settings] > [Auto Gradation Correction]
Image sample
14.3.2 Faulty Feeding
14.3.2.1 Skew Feed
14.3.2.1.1 Misalignment of output paper/jam occurs after replacement of swing guide assembly (Finisher-AA1/AA2)
imagePRESS C1 P / imagePRESS C1 / Color Image Reader-H1 / imagePRESS C1 (CUSTOM) / imagePRESS C1+ (Printer) / imagePRESS C1+
[ Inspected by Canon Inc. ]
Description
In the field, paper misalignment or a paper jam occurred after replacement of the swing guide assembly (4G3-1541).
Cause
When replacing the swing guide assembly [1], it was mounted in a state in which the grounding spring [3] contacting the lateral side of the swing press plate
[2] rode on the plate. This reduced the movable range of the swing guide assembly, causing paper misalignment or a paper jam.
F-14-26
Chapter 14
0014-6144
0018-0753
14-21