Canon PIXMA TS302 Online Manual page 326

1203
Cause
Cover is opened during printing.
What to Do
If paper remains inside the printer, slowly pull out the paper with both hands and close the cover.
Press the printer's RESUME button to resolve the error.
The printer ejects one blank sheet of paper and resumes printing from the next paper.
The printer will not reprint the page that was printed when the cover is opened. Retry printing.
Important
• Do not open or close the cover during printing, as this can damage the printer.
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