Chapter 1414-2114.3.1.7.7 Gradation changes after shading correction0014-6144imagePRESS 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 correctionFlow of corrective operation1) 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 sampleF-14-2614.3.2 Faulty Feeding14.3.2.1 Skew Feed14.3.2.1.1 Misalignment of output paper/jam occurs after replacement of swing guide assembly (Finisher-AA1/AA2)0018-0753imagePRESS C1 P / imagePRESS C1 / Color Image Reader-H1 / imagePRESS C1 (CUSTOM) / imagePRESS C1+ (Printer) / imagePRESS C1+[ Inspected by Canon Inc. ]DescriptionIn the field, paper misalignment or a paper jam occurred after replacement of the swing guide assembly (4G3-1541).CauseWhen 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.
