Question about Lexmark T642 Laser Printer
You might need to replace the Fuser Wiper Cover Assembly. The part number for the said part is 40X0001. Please contact any Lexmark Authorized Service Provider or contact our Technical Support Hotline.
Posted on Nov 07, 2012
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Posted on Jan 02, 2017
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Remove the 2 screws circled in red below.
Close the back door, and then flip the printer so that it rests on its face.
Next swing open the paper guard which shields the back of Tray 2 when it is installed.
Looking inside the Tray 2 cavity, use a flatblade screwdriver to release the two tabs--one on each side of the rear cover.
Next remove the rear cover from the printer by pulling down and away.
Fuser Installation Continued . . .
Pry the grey DIMM cover loose and remove it.
Use a small flatblade screwdriver to disengage the tab on the connector shown below and unplug the connector.
Next (on the right hand side) remove the small black plastic cover, located near the green fuser gear, which hides the other fuser wires.
Then unplug the two connectors shown below and free the yellow/white wire from its guide clasp.
Now remove the four screws holding the fuser in place (shown below).
Now remove the black plastic piece shown below, the duplexer inlet guide. Gently pry the tabs on both ends loose and slide/rotate the guide back towards the fuser to release it.
Now you can remove the fuser, just pull it straight out towards you. Don't install the new fuser until you've replaced the main motor gear, as shown below.
Replacing Fuser Drive Gear
With the fuser removed, look into the printer and locate the main fuser drive gear on the left side of the fuser cavity (gear circled in red below).
Use a flathead screwdriver to pry the gear's release tab and remove the gear by sliding it off its metal bar.
Slide the new gear onto the metal bar--make sure the gear's release tab faces outwards so it will be accessible again--and lock the gear firmly in place.
Now repeat the fuser removal process backwards as you install the New Fuser:
Insert the new fuser and replace the four fuser screws. Replace the black plastic duplexer inlet guide, making sure both tabs click in place. Re-plug the single connector on the left side, and the two connectors on the right side. Replace the wire cover on the right side. Reinstall the DIMM cover. Finally, replace the back cover with its screws.
This is a difficult installation which should be done by a technician. Good luck with it !
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