Canon imageRUNNER ADVANCE 715 series Service Manual page 140

8. Close the Feeder Cover [1].
9. Remove the ADF Unit [1] while removing the Harness Cover [2].
CAUTION:
When installing the ADF Unit [1], be sure to insert the rib [A} of the Harness Cover into the guide [B] of the Reader Unit.
[B]
[A]
1x
[3]
1x
[1]
[1]
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4. Parts Replacement and Cleaning
[2]
[1]
[2]