Xerox DocuMate 4790User’s Guide166Replacing the RollersFrequent paper jams are a symptom of a worn roller assembly. A worn roller can cause documents tofeed in skewed at an angle, or multiple pages to feed at the same time. A worn roller should bereplaced to avoid damage to the scanner’s internal parts. Before replacing the roller you should clean itas excessive dust on the roller will make it appear worn and smooth. You cannot properly diagnose aworn roller until you have cleaned it.When replacing the rollers described in this section, you should replace all of the rollers at the sametime. Do not replace just one roller and not the other. When you are finished replacing the roller, resetthe roller count in the user utility as described on page 175.Warning: keep all replaceable parts out of the reach of children. These parts are small and pose achoking hazard.Turn off the scanner power then unplug the power cord from the scanner. Pull the cover release handleand open the scanner.When you are done replacing the rollers, close the scanner carefully pressing down on both sides of thecover until it locks in place. Do not slam down the cover.
