General information
The Lexmark
TM
MX91x MFPs are network‑capable, multifunction laser printers that print monochrome print jobs. All
information in this service manual pertains to all models unless explicitly noted.
The printers are available in the following models:
Model Configurations Machine type / model
MX910de Mono laser MFP, Networking, Duplex print, Duplex scan,
10.1‑in. color touch screen
7421-036
MX911dte Mono laser MFP, Networking, Duplex print, Duplex scan,
10.1‑in. color touch screen
7421-236
MX912dxe Mono laser MFP, Networking, Duplex print, Duplex scan,
10.1‑in. color touch screen
7421-436
For information on diagnosing a problem, see “Diagnostic information” on page 45. For information on removing
and reinstalling parts, see
“Repair information” on page 241. For information on identifying the parts, see “Parts
catalog” on page 542.
Paper and specialty media guide
Notes:
• Make sure that the paper size, type, and weight are set correctly on the computer or control panel.
• Flex, fan, and straighten specialty media before loading them.
• The printer may print at a reduced speed to prevent damage to the fuser.
• For more information on card stock and labels, see the Card Stock & Label Guide at
http://support.lexmark.com.
Using specialty media
Tips on using card stock
Card stock is heavy, single‑ply specialty media. Many of its variable characteristics, such as moisture content, thickness,
and texture, can significantly affect print quality.
• From the printer control panel, set the paper size, type, texture, and weight in the Paper menu to match the card
stock loaded in the tray.
• Print samples on the card stock being considered for use before buying large quantities.
• Specify the paper texture and weight from the tray settings to match the paper loaded in the tray.
• Preprinting, perforation, and creasing may significantly affect the print quality and cause jams or other paper feed
problems.
• Before loading the card stock on the tray, flex and fan the card stock to loosen them. Straighten the edges on a
level surface.
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General information
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