Canon imagePRESS C800 Series, Troubleshooting Manual

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Chapter 1
1-6
[Caution]
- The density adjustment is performed based on all the density values of marks from 0 to 8. If all marks from 0 to 8 are shown on the test page, make sure to gauge
and enter the density values for all imprinted marks.
- If the marks 0 and 8 are not shown on the test page, gauge and enter the density values for all the imprinted marks from 1 to 7 and make sure that the density values
for the marks 0 and 8 are set to "0". If you enter the density values other than "0" for the marks 0 and 8, you cannot perform density adjustment precisely.
5) Press Output Test Page > "Start Printing". Test page 2 with marks from -7 to +6 after adjustment is output.
[Reference]
- The marks -7 and +6 may not be shown on the output test page 2, depending on the paper width.
- Although the mark -7 may be shown on the output test page 2, the numbers you can adjust values for are from -6 to +6. You cannot adjust values for -7.
Test page 2
6) View the output test page 2 and confirm that there is no uneven density.
7) Press "Store and Finish".
b) To perform visual correction:
1) Settings/Registrations > Adjustment/Maintenance > Adjust Image Quality > Correct Shading > Visual Correction > Output Test Page > "Start Printing". Test
page 2 with marks from -7 to +6 is output.
[Reference]
- The marks -7 and +6 may not be shown on the output test page 2, depending on the paper width.
- Although the mark -7 may be shown on the output test page 2, the numbers you can adjust values for are from -6 to +6. You cannot adjust values for -7.
2) View the output test page > press "Fine Adjust" of the color you want to adjust.
3) Select the number to adjust > press "+" for a heavy density or "-" for a light density > "OK".
4) Press Output Test Page > "Start Printing". Test page 2 with marks from -7 to +6 after adjustment is output.
5) View the output test page 2 and confirm that there is no uneven density.
6) Press "Store and Finish".
7) The display returns to the screen of Correct Shading. Repeat steps for visual correction until the shading is improved.
c) To perform print server correction:
[Caution]
- "Print Server Correction" is displayed only when the imagePRESS Server is installed.
- For more information on the print server correction, see the instruction manual of the imagePRESS Server.
1) Settings/Registrations > Adjustment/Maintenance > Adjust Image Quality > Correct Shading > Print Server Correction > "Start Printing". Test page is output.
2) Gauge the mark on the output test page using the densitometer that is attached to the imagePRESS Server, and forward the adjustment values to the main unit.
3) Press Output Test Page > "Start Printing". Test page 2 with marks after adjustment based on the transferred data is output.
[Reference]
- The marks -7 and +6 may not be shown on the output test page 2, depending on the paper width.
- Although the mark -7 may be shown on the output test page 2, the numbers you can adjust values for are from -6 to +6. You cannot adjust values for -7.
4) View the output test page 2 and confirm that there is no uneven density.
5) Press "Store and Finish".
1.1.1.3.3 Gradation/density/light hue/solid color issue on copy and print and gradation adjustment
0031-5621
[ Manual-related ]
Description
When copying or printing, if the gradation or density is poor, hue is light or solid color issue occurs, following adjustments can be implemented according to the
use of copy or print.
Field Remedy
a) Automatically adjust gradation and density
You can recalibrate the machine when you notice irregularities in the color of the copies or prints, such as when copies or prints turn out to be different from the
original in gradation, density or color. The following two types of automatic gradation adjustments can be made:
"Full Adjustment": This is a precise recalibration that is made to the gradation, density, and color settings of the machine. The procedure involves making test pages