Canon imagePROGRAF GP-4000 - Manual (Page 876)

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Cause
The print head nozzle is blocked.
What to Do
Follow the steps below to clean the print head.
1. Tap Cancel on the touch screen to stop printing.
2. Clean the print head. 2.
Cleaning the Print Head
If this message still appears when printing, replace the print head.
Replacing the Print Head
Important
• To continue printing, use the touch screen and tap Continue printing . However, the print results may
not be satisfactory.
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