Canon TR7660 Online Manual page 522

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Cause
Paper is jammed when performing automatic duplex printing.
What to Do
1. Remove jammed paper.
• If the paper is jammed at the paper output slot:
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• If the paper is jammed inside the printer:
Paper Is Jammed inside Printer
• If the paper is jammed at the feed slot of the cassette:
Pull out the cassette, and then remove the jammed paper slowly with both hands.
• If the measures above do not solve the problem:
Removing Jammed Paper from Rear Side
2. Load paper properly.
Loading Plain Paper / Photo Paper in Rear Tray
Loading Plain Paper in Cassette
When you load A4 sized paper in the cassette, make sure you have extended it.
1. Remove cassette cover (A).
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