Canon imageCLASS MF4690 Operation Manual page 205

ADF
●
If your documents have black streaks or
appear dirty after copying them using the
ADF, this may be caused by pencil lead
rubbing off the documents and onto the
roller. Clean the ADF scanning area and
roller.
1
Turn off the main power switch
and disconnect the power cord.
2
Open the ADF cover.
10-8
3
Clean the rollers (A) inside the ADF
with a cloth dampened with water.
Then wipe the area with a soft, dry
cloth.
Do not dampen the cloth too much, as this
may tear the document or damage the
machine.
4
Close the ADF cover.
Be careful not to get your fingers caught.