Canon imagePROGRAF GP-300 - Manual (Page 798)

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Cause
Print head position adjustment failed.
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. 2.
Checking for Nozzle Clogging
3. If the nozzle is blocked, clean the print head. 3.
Cleaning the Print Head
4. Retry Print Head Alignment . 4.
Automatic Adjustment to Straighten Lines and Colors
If any print head nozzles are still blocked, replace the print head.
Replacing the Print Head
If the error appears again, the printer may be damaged. Contact a Canon customer service center.
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