Canon PIXMA MX870 - Manual (Page 989)

7. Close the Document Cover.
8.
Close the Document Output Slot, then turn on the machine.
When rescanning the document after clearing the error, rescan it from the first page.
If you cannot remove the document or the document tears inside the machine, or if the
document jam error continues after removing the document, contact the service center.
Removing the jammed document from the Document Output Slot:
If the document is jammed in the Document Output Slot, open the Document Output Slot as
shown in the figure below and pull out the document.
When rescanning the document after clearing the error, rescan it from the first page.
If you cannot remove the document or the document tears inside the machine, or if the document
Page 989 of 1127 pages Document Jams in the ADF