Messages regarding printheads
PHead needs cleaning.
The Printhead nozzles are clogged.
Wrong printhead.
An incompatible Printhead has been installed.
Problem with Printhead
The Printhead nozzles are becoming clogged.
Printhead error
There is a problem with the Printhead.
No printhead
No Printhead is installed.
678 Error Message
Cause
Cause
Cause
Cause
Cause
Corrective Action
Press the Online button to resume printing.
Follow these steps to clean the Printhead.
1.
Hold down the Stop button for a second or more
to cancel printing.
2.
Printhead cleaning options.
(→P.588)
If the message is still displayed after you execute
Head Cleaning B once or twice, contact your Canon
dealer for assistance.
Corrective Action
Open the Top Cover and replace the Printhead with
a new one.
(→P.589)
Corrective Action
If printing is faint, clean the Printhead.
(→P.588)
Corrective Action
Open the Top Cover and replace the Printhead with
a new one.
(→P.589)
Corrective Action
Install the Printhead.
(→P.589)
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