Lexmark C 540n, Руководство по обслуживанию

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3-46
Service Manual
5025-2xx, 4xx
Paper path, transport components
In order 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 the output bin.
The most important component in this process is this media itself. Old, damaged or out-of-specification media
can and will cause feed and transport problems. If you encounter problems, you should always check the media
first. See
“Media guidelines” on page 1-12 . In addition, it is always good practice to check the printer and
driver settings to see if the media being used matches the user’s settings. It is not uncommon to find a user
printing on card stock 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.
Paper path Information
This printer has a simple “C” shaped paper path (see the picture below). The tray 1 paper path is shown in red
and the optional 650-sheet Duo Drawer paper path is not shown.
Paper is fed from the rear of the printer and travels upward through the front cover.
There is a duplex unit on this printer. The duplex unit is built into the front cover and tray 1. The duplex process
is described later. See
“Duplex process” on page 3-48 .
Paper pick motor drive asm.
Tray present sensor
Paper path
Pick roller
ITU
PC unit
(part of
imaging unit)
Developers
Y, C, M, K
Y
M K C
Controller
board
Toner cartridges
Y, C, M, K
Printhead
Output bin
Exit rolls/duplex entry
Operator panel
Bin-full/narrow
media sensor
Front cover
/duplex
Fuser
Fuser
exit sensor
(part of ITU)
Duplex/manual feed
sensor (S1)
Tray 1
Transfer
roll
Input/sensor
(S2)
(Part of ACM)