Canon imagePROGRAF TA-20 MFP 24" Large Format Printer with L24ei Scanner and Stand Kit - Manual (Page 726)

The contrast becomes uneven during printing
Check 1 Has the paper feed rate been calibrated properly?
Adjust the feed amount.
Adjusting Feed Amount
Check 2 Is the media type specified in the printer driver the same as the media type
loaded in the printer?
Load the printer with the media type specified in the printer driver.
Loading Rolls in the Printer
Loading Sheets in the Printer
Follow the steps below to match the media type in the printer driver to the media type loaded in the printer.
1. To stop printing, press the Stop button.
2. Change the type of paper in the printer driver and try printing again.
Check 3 Has the Print head position been calibrated properly?
Adjust the Print head position.
Automatic Adjustment to Straighten Lines and Colors
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