Lexmark C 746 Service Manual

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Printhead verification
You can verify that the printhead is the failing FRU by following this procedure:
1.Turn the printer off, and remove the power cord from the outlet. Remove all cords and cables from the 
printer before beginning.
2.Locate the printer on a corner of a work area so the front and back can be accessed. 

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3.Remove the rear frame cover.
a.Loosen the eight screws on the rear frame cover (A). 
Note: Do not remove the screws.
b.Lift up on the rear frame cover to remove it from the back of the printer. 

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4.Carefully unplug the printhead ribbon (B) and the mirror motor cables (C) from the system board, and 
carefully connect the printhead ribbon and mirror motor cables from the new printhead into the system 
board. It is important to position the laser in the printhead down into the packaging as shown.
Note:  Use the packaging that came with the printhead FRU to prop the printhead up.
5.Connect the power cord to the outlet and to the printer. Reconnect any...

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Paper Jams
Error jam locations
The following illustration shows the location and error codes generated for specific paper jams and the 
corresponding locations of these jams. 

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Clearing jams
By carefully selecting papers and specialty media (see “Paper guidelines” on page 1-13) and loading it 
properly, you should be able to avoid most jams. If jams do occur, follow the steps outlined below. 
To resolve the jam messages, you must clear the entire paper path, and press   or touch   to clear the 
message and resume printing. The printer prints a new copy of the page that jammed if Jam Recovery is set to 
On or Auto; however, the...

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200 paper jams
If paper jams behind the inner door, but not under the photoconductor units, 200.xx Paper jam appears.
Note:  To avoid overexposing the photoconductor units, do not leave the front door open longer than 10 
minutes.
1.Open the front door.
2.Pull the jammed paper up and out to remove it from behind the toner cartridge area.
Note:  Make sure all paper fragments are removed.
3.Close the front door.
4.Press   or touch  .
200 or 201 paper jam
If...

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3.Remove each photoconductor unit, and place it on a flat surface.
4.Remove the jammed paper, and then replace each photoconductor unit.
5.Close the front door.
6.Press   or touch  .
201 paper jam
If paper is jammed under the fuser or the top cover, 201.xx Paper jam appears.
1.Open the front door, and then open the top cover.
Warning:  Potential Damage: To avoid overexposing the photoconductor units, do not leave the front 
door open longer than 10...

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c.Lift the unit and pull to remove it.
d.Remove the jammed paper.
e.Replace the fuser unit, and then turn the screws to the right to fasten it securely. 
3.Close the top cover, and then close the front door.
4.Press   or touch  .
202 paper jam
If paper is jammed both under the fuser unit and in the slot behind the fuser unit, 202.xx Paper jam appears.
1.If the paper is visible in the standard exit bin, grasp the paper and pull it away from the bin.
2.Open...

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If the paper is jammed behind the fuser, you will need to remove the fuser unit.
a.Turn the screws on the fuser unit to the left.
b.Lift the unit and pull to remove it.
c.Pull the paper gently out of the printer or up toward the standard exit bin to remove it.
d.Place the fuser unit back into the printer, and turn the screws to the right to fasten the fuser unit 
securely.
4.Close the top cover, and then close the front door.
5.Press   or touch  . 

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203 paper jam
If paper is jammed under the rollers near the fuser, or in the standard exit bin 203.xx Paper jam appears.
1.Grasp the paper that is visible in the standard exit bin, and pull it away from the bin.
2.Open the front door, and then open the top cover.
3.Grasp the paper on each side, and pull it out gently.
4.Close the top cover, and then close the front door.
5.Press   or touch  .
230 paper jam 
If paper is jammed between the front door and tray...