Lexmark C734dn User Manual

Warning—Potential Damage: To avoid overexposing the photoconductor units, do not leave the front door
open for more than 10 minutes.
2Remove all four toner cartridges. Do not remove the photoconductor units for this procedure.
3Locate the four printhead lenses.
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4Clean the lenses using a can of compressed air.
Warning—Potential Damage: Do not touch the printhead lenses.
5Reinstall the four toner cartridges. Maintaining the printer131
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6Close 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.
Checking the status of supplies from the...

Checking the status of supplies from a network computer
Note: The computer must be connected to the same network as the printer.
1Type the printer IP address into the address field of your Web browser.
Note: If you do not know the IP address of the printer, print a network setup page and locate the IP address in
the TCP/IP section.
2Click Device Status. The Device Status page appears, displaying a summary of supply levels.
Ordering supplies
To order supplies in the U.S., contact Lexmark at 1-800-539-6275...

Part namePart number
Fuser 40X5095 (100 volt)
40X5093 (115 volt)
40X5094 (230 volt)
Transfer Module 40X5096
Ordering a waste toner box
When 82 Waste toner box nearly full appears, order a replacement waste toner box. When 82 Replace
waste toner box appears, you must replace the waste toner box.
Note: Waste toner box reuse is not recommended.
Part namePart number
Waste Toner Box C734X77G
Replacing supplies
Replacing a toner cartridge
When 88 Replace  cartridge, 88  cartridge nearly low, or 88 
cartridge...

2Pull up and out on the green tabs of the specified cartridge to remove it from the printer.
3Shake the cartridge front to back and side to side to redistribute the toner.
4Reinsert the cartridge to continue printing.
5Repeat this process multiple times until printed text and graphics remain faded.
When printed text and graphics remain faded, replace the specified cartridge. Repeat steps 1 and 2, and then follow
the steps below. Maintaining the printer135
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6Unpack a new cartridge.
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2
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7Place the old cartridge in the replacement cartridge shipping box, and then attach the return label to the box for
shipping.
8Shake the new cartridge front to back and side to side to evenly distribute the toner.
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9Remove the red packing strip from the new cartridge.
10Insert the new cartridge into the printer.
11Close the front door.
Note: Make sure each cartridge is fully pushed in. If a cartridge is not installed correctly, the printer may issue a
 Cartridge Missing message, where  is Black, Cyan, Magenta, or Yellow. The
printer may also issue the message Close front door.
If either of these messages appears, follow these steps to clear the printer control panel message and continue printing:
1Open the front...

4Close the front door.
5Check the printer control panel to see if it is clear of messages.
6Repeat as needed for additional toner cartridge replacement.
Replacing a photoconductor
There are three different display messages that may appear when a photoconductor replacement is necessary: 84
Replace  photoconductor, 84  photoconductor nearly low, or 84 
photoconductor low.
Note: A replacement photoconductor can be used with any color.
Replacing a photoconductor is a two‑part process. First, complete the...

3Unpack the replacement photoconductor.
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Warning—Potential Damage: Do not touch the shiny area on the photoconductor drum. Touching it could
damage the photoconductor.
4Align and insert the left end of the photoconductor, and then press the right end until it clicks into place.
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5Remove the red packing strip from the top of the photoconductor.
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6Place the old photoconductor into the replacement photoconductor box, and then place the return label on the
box for shipping to Lexmark for recycling.
7Close the front door.
8If you see 84 Replace  photoconductor, 84  photoconductor nearly low,
or 84  photoconductor low on the display, then press the up or down arrow button until 
Supply Replaced appears, and then press .
Note: Failure to reset the life count may result in degraded print quality.
Replaced  photoconductor appears.
Yes appears.
9Press...