Lexmark C720 Service Manual - Page 161

5024-001 Duplex Paper Feed Service Check FRU Action 1 Check for Paper Ensure all paper is cleared from the printer and options. Note: See the illustration, "Lower Feed Unit Theory of Operation" on page 1-48 and "" on page 1-50, for more information. Note: The printer can be checked by running a test print without the duplex being selected or connected. If the paper jam is 231 and the paper is being fed into the printer and stopped, go to the "Lower Feed Unit Paper Feed Service Check" on page 2-79. 2 Duplex Upper Solenoid Check the duplex top unit, upper solenoid (DSOL-U) assembly to ensure there are no binds or damaged parts. 3 Top Cover D Rolls 4 • Top Cover (B) Assembly • Paper Guide RVS Assembly • Cover Low (B) Assembly • Paper Guide Bottom Assembly • Paper Guide Inner Replace any damaged parts, if necessary. Check the top cover assembly to ensure all the D rollers are in place and not damaged. Replace any damaged parts, if necessary. Check the following part for dirt or damage, and replace if necessary. Diagnostic Information 2-81