Canon imagePROGRAF TA-20 MFP 24" Large Format Printer with L24ei Scanner and Stand Kit - Manual (Page 881)

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Cause
The print head nozzle may be blocked.
What to Do
Follow the steps below to repeat Print head alignment .
1. Tap OK on the touch screen to dismiss the error.
2. Print a test pattern to check the nozzles.
Checking for Nozzle Clogging
3. If the nozzle is blocked, clean the print head.
Cleaning the Print Head
4. Repeat Print head alignment .
Automatic Adjustment to Straighten Lines and Colors
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