Lexmark E320 - Printer - B/W Service Manual page 114

4500
Paper "trees," wrinkles, stacks poorly or curls
FRU
Fuser backup roll
Paper skews or jams at registration roll
FRU
Registration roll assembly
Lower registration roll
Registration roll bushings
2-84
Service Manual
Action
This problem is most likely due to a
worn backup roll. A worn backup roll
causes the printer to run hotter than
required for the media being printed.
Excessive heat can cause paper
treeing problems, poor stacking, or
curl.
Action
The registration roll contains a
spring–loaded paper "stop" that
deflects and aligns the paper as it is
fed.
• Verify that the "stop" pivots freely
and the springs fully return it after
the paper passes.
• Verify the rolls are in good
condition and clean.
• Replace unit(s) as necessary.