Canon imagePRESS C800 Series Troubleshooting Manual page 22

Chapter 1
The following procedures are required when using the Duplex Color Image Reader Unit-H1 as an automatic gradation adjustment method. When using the Auto
Gradation Sensor-A1, you do not need to scan test pages. When you press "Start Printing", the machine prints test pages and perform full adjustment automatically.
2) Press "Start Printing" to output the first test page.
3) Place the output first test page face down on the platen glass with the black strip along left edge and then press "Start Scanning".
4) Remove the first test page from the platen glass > press "Start Printing". Second test page is output.
5) Place the second test page face down on the platen glass, with the black bar along the top back edge of the platen glass > press "Start Scanning".
[Reference] Make sure to place the last output if the multiple test pages are output by setting "Number of Sheets to Output for Test Page".
6) Remove the second test page from the platen glass > press "Start Printing". Third test page is output.
7) Place the third test page face down on the platen glass, with the black bar along the top back edge of the platen glass > press "Start Scanning".
[Reference] Make sure to place the last output if the multiple test pages are output by setting "Number of Sheets to Output for Test Page".
8) Remove the third test page from the platen glass.
c) Quick Adjustment
1) Press Settings/Registration > Adjustment/Maintenance > Adjust Image Quality > Auto Adjust Gradation > Quick Adjustment > Start.
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