X790 Series Maintenance Guide August 2011 www.lexmark.
Contents Maintaining the printer................................................................................3 Cleaning the exterior of the printer..........................................................................................................3 Cleaning the scanner glass........................................................................................................................4 Cleaning the ADF parts....................................................................................
Maintaining the printer Periodically, certain tasks are required to maintain optimum print quality. Cleaning the exterior of the printer 1 Make sure that the printer is turned off and unplugged from the wall outlet. CAUTION—SHOCK HAZARD: To avoid the risk of electric shock when cleaning the exterior of the printer, unplug the power cord from the wall outlet and disconnect all cables to the printer before proceeding. 2 Remove paper from the standard exit bin. 3 Dampen a clean, lint‑free cloth with water.
Cleaning the scanner glass Clean the scanner glass if you encounter print quality problems, such as streaks on copied or scanned images. 1 Slightly dampen a soft, lint-free cloth or paper towel with water. 2 Open the scanner cover. 1 White underside of the ADF cover 2 White underside of the scanner cover 3 Scanner glass 4 ADF glass 3 Wipe the areas shown and let them dry.
4 Open the bottom ADF door. 5 Wipe the ADF scanner glass under the ADF door. 6 Close the bottom ADF door. 7 Close the scanner cover. Cleaning the ADF parts Clean the ADF parts periodically to maintain optimal printing performance. Residue on the ADF parts may cause print quality issues and false 280–299 paper jam messages. 1 Turn the printer off. 2 Slightly dampen a soft, lint-free cloth with water. 3 Open the ADF cover.
4 Remove the pick roller assembly. 5 Wipe the surface of both pick rollers. 6 Replace the pick roller assembly. 7 Wipe the entire surface under the ADF cover. 8 Close the ADF cover.
Cleaning the printhead lenses Clean the printhead lenses when you encounter print quality problems. 1 Open the front door. 2 Remove all print cartridges. Warning—Potential Damage: Do not touch the shiny area on the photoconductor drum. Doing so can damage the photoconductor. 3 Locate the four printhead lenses. 4 Clean the lenses using compressed air. Warning—Potential Damage: Do not touch the printhead lenses. 5 Reinstall the print cartridges.
6 Close the front door. Storing supplies Choose a cool, clean storage area for the printer supplies. Store supplies right side up in their original packing until you are ready to use them. Do not expose supplies to: • • • • • • Direct sunlight Temperatures above 35°C (95°F) High humidity above 80% Salty air Corrosive gases Heavy dust Checking the status of supplies A message appears on the display when a replacement supply item is needed or when maintenance is required.
Ordering supplies To order supplies in the U.S., contact Lexmark at 1-800-539-6275 for information about Lexmark authorized supplies dealers in your area. In other countries or regions, visit the Lexmark Web Site at www.lexmark.com or contact the place where you purchased the printer. Notes: • The toner gauge is an estimate of how much toner is left in your cartridge. • All life estimates for printer supplies assume printing on letter‑ or A4‑size plain paper.
Ordering a waste toner bottle When 82 Waste toner bottle nearly full appears, order a replacement waste toner bottle. When 82 Replace waste toner bottle appears, replace the waste toner bottle. Note: Waste toner bottle reuse is not recommended. Part name Part number Waste toner bottle C792X77G Ordering staple cartridges When Staples Low or Staples Empty appears, order the specified staple cartridge. For more information, see the illustrations inside the stapler door.
Replacing supplies Replacing a print cartridge 1 Open the front door. 2 Lift the green handle and pull the print cartridge. Grasp the top handle and lift the cartridge out of the machine. 3 Place the old cartridge in the replacement cartridge shipping box, and then attach the return label to the box for shipping.
4 Unpack a new print cartridge. Warning—Potential Damage: Be careful not to touch the photoconductor drum. Doing so may affect the print quality of future print jobs. 5 Shake the new cartridge front‑to‑back and side‑to‑side to evenly distribute the toner.
6 Remove the red packing strip from the new cartridge. 7 Insert the new cartridge into the printer, and then push the green handle back in place. Note: Make sure the cartridge is fully pushed in. 8 Close the front door.
Replacing the waste toner bottle Replace the waste toner bottle when 82.xx Replace waste toner bottle appears. The printer will not continue printing until the waste toner bottle is replaced. 1 Remove the replacement waste toner bottle from its shipping box, and then unpack it. 2 Open the printer front door, and then open tray 1. 3 Pull the green tabs sideways, and then grasp and pull the tabs with both hands to remove the waste toner bottle. 4 Place the waste toner bottle in the recycling bag.
6 Peel the recycling label off, and place it on the shipping box. 7 Insert the new waste toner bottle into the printer. 8 Close tray 1, and then close the front door. Moving the printer Before moving the printer CAUTION—POTENTIAL INJURY: The printer weight is greater than 18 kg (40 lb) and requires two or more trained personnel to lift it safely.
Moving the printer to another location The printer and options can be safely moved to another location by following these precautions: • Any cart used to move the printer must have a surface able to support the full footprint of the printer. Any cart used to move the options must have a surface able to support the dimensions of the options. • Keep the printer in an upright position. • Avoid severe jarring movements.
