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Scanner Options, Maintenance and Troubleshooting
Xerox
®
DocuMate
®
4790
User’s Guide
9-163
Replacing the Rollers
Frequent paper jams are a symptom of a worn roller assembly. A worn roller can cause documents to feed in
skewed at an angle, or multiple pages to feed at the same time. A worn roller should be replaced to avoid
damage to the scanner’s internal parts. Before replacing the roller you should clean it as excessive dust on the
roller will make it appear worn and smooth. You cannot properly diagnose a worn roller until you have cleaned it.
When replacing the rollers described in this section, you should replace all of the rollers at the same time. Do not
replace just one roller and not the other. When you are finished replacing the roller, reset the roller count in the
user utility as described on page 171.
Warning: keep all replaceable parts out of the reach of children. These parts are small and pose a choking
hazard.
Turn off the scanner power then unplug the power cord from the scanner. Pull the cover release handle and open
the scanner.
When you are done replacing the rollers, close the scanner carefully pressing down on both sides of the cover
until it locks in place. Do not slam down the cover.