Paper Path Theory; Sfp Paper Path - Lexmark C950 Service Manual

5058-030
the possibility of the fuser pressure roll receiving flat spots that can result in abnormal thumping noises and
possible print quality issues.
Service tips
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Paper path theory

SFP paper path

For an image to be printed, the media has to be moved from an input source (such as a tray) into the printer and
eventually exit into an output source.
The most important component in this process is the media. Old, damaged, or out-of-specification media can
and will cause feed and transport problems. If problems are encountered, then the media should always be
checked first. See
1-9. In addition, it is always a good practice to check the printer and driver settings to see if the media
page
being used matches the user's settings. It is not uncommon to find a user printing on cardstock with the printer
programmed to print on a plain paper setting.
The printer's feed and transport components can fail and cause paper jams or other feed and transport
problems. These components should be examined for damage or wear, and replaced if necessary.
SFP paper path rolls
Duplex media transport roll assembly
MPF transport roll
MPF feed roll
MPF pick roll
MPF separation roll
Tray module transport roll assembly
Service Manual
3-60
If the fuser belt or rollers are damaged, they can cause toner to be pulled off the page or
cause paper jams.
Toner that does not properly adhere to a printed page can be a sign of a malfunctioning fuser
or an improper media setting. Always check the paper type setting before replacing the fuser.
A common mistake is to print on heavier media (such as cardstock) with the paper type set to
plain paper.
"Media input size specifications" on page 1-7
and
"Media input type specifications" on
Redrive roll
fuser
2nd transfer roll assembly
Tray 1 transport roll assembly
Feed roll
Pick roll
Separation roll
TRAY 1
Feed roll
Pick roll
Separation roll
TRAY 2
Feed roll
Pick roll
TRAY 3
Separation roll
TRAY 4
Pick roll
Feed roll
Separation roll
Registration roll assembly
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