Lexmark X443 User Manual page 101

Replacing the pick roller
The life expectancy of pick rollers (P/N 12G1836) is approximately 200, 000
scanned pages or one year.
If you experience problems with papers not being picked up correctly, try
cleaning the pick rollers. If that doesn't work, then the rollers may need to be
replaced.
1
Open the ADF.
2
Remove the two thumbscrews. Be careful not to drop them.
3
Lift up the right end of the guide, and then the left to remove it.
93
Thumbscrews
Guide