Canon imagePRESS C800 Series Troubleshooting Manual page 138

Chapter 1
6-1) Turn the plastic screw [A] clockwise to make a full round.
Refer to the replacement procedure of the Primary Charging Assembly to install the Primary Charging Assembly to the Host Machine, and then output the test print
to check the image.
6-2) If the image at the front side of test print image is still dark, turn the plastic screw [A] clockwise to make another full round.
Refer to the replacement procedure of the Primary Charging Assembly to install the Primary Charging Assembly to the Host Machine, and then output the test print
to check the image.
6-3) If the image at the front side of the test print is still dark, turn the plastic screw [A] clockwise to make a half round.
Refer to the replacement procedure of the Primary Charging Assembly to install the Primary Charging Assembly to the Host Machine, and then output the test print
to check the image.
7) Adjust the Primary Charging Assembly (in the case of dark image at the rear side on the test print).
In the case of dark image at the rear side of the test print, execute step 7-1) through 7-3) below until the density gets even. Then, if there is no density unevenness,
execute the work in step 8) and later.
7-1) Turn the plastic screw [A] counterclockwise to make a full round.
Refer to the replacement procedure of the Primary Charging Assembly to install the Primary Charging Assembly to the Host Machine, and then output the test print
to check the image.
7-2) If the image at the rear side of the test print is still dark, turn the plastic screw [A] counterclockwise to make another full round.
Refer to the replacement procedure of the Primary Charging Assembly to install the Primary Charging Assembly to the Host Machine, and then output the test print
to check the image.
7-3) If the image at the rear side of the test print is still dark, turn the plastic screw [A] counterclockwise to make a half turn.
Refer to the replacement procedure of the Primary Charging Assembly to install the Primary Charging Assembly to the Host Machine, and then output the test print
to check the image.
8) Execute the ITB neutral position adjustment.
Service Mode > COPIER > Function > INSTALL > INIT-ITB (Creation of ITB edge profile)
9) Execute the auto gradation adjustment.
Settings/Registration > Adjustment/Maintenance > Adjust Image Quality > Auto Adjust Gradation > Full Adjust
10) Execute the color displacement correction.
Settings/Registration > Adjustment/Maintenance > Adjust Image Quality > Auto Correct Color Mismatch
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