Lexmark C 746 Service Manual

							Repair information4-105
 5026
Go Back Previous
Next
6.Remove the fuser. See “Fuser removal” on page 4-110.
7.Push down on both of the front door locking mechanism simultaneously to close the camshaft.
8.Close the front access door assembly.
9.Release the cable spring (H) from the front door assembly.
Note:  In order to access the springs, make sure the top access cover is closed.
H 
						

							4-106Service Manual 5026 
Go Back Previous
Next
10.Remove the end of the cable (J) from the frame. 
Installation notes:
•The longer cable installs on the left side of the printer.
•Push down on the lever to raise front door locking mechanism and open the camshaft. 
						

							Repair information4-107
 5026
Go Back Previous
Next
Front door assembly front cable (right) removal
1.Remove the paper tray.
2.Disconnect the transfer module cable (A). 
3.Press the two tabs (B) to release the front access door cover assembly.
4.Press the two tabs (C) on either side of the transfer module, and lift out the transfer module.
Note:  Leave the photoconductor units on the transport belt when removing. 
Warning:  To avoid damaging the photoconductor drum, hold the photoconductor units by their handle and 
place the photoconductor units on a clean surface. Never expose the photoconductor units to light for a 
prolonged period of time. See “Handing the photoconductor unit” on page 4-2 for additional 
information.
BC
A 
						

							4-108Service Manual 5026 
Go Back Previous
Next
5.Looking down at the keyed end of the restraint (D), twist the end clockwise, slide the restraint upward 
through the slit (E), and slip the end of the restraint through the keyed hole (F). Repeat for the other side.
DF E 
						

							Repair information4-109
 5026
Go Back Previous
Next
6.Remove the right cover. See “Right cover removal” on page 4-51.
7.Close the front access door assembly.
8.Release the spring (G) from the front door assembly.
Note:  In order to access the springs, make sure the top access cover is closed.
9.Remove the end of the cable (H) from the frame.
10.Remove the right restraint cable.
G 
						

							4-110Service Manual 5026 
Go Back Previous
Next
Installation note:  The shorter restraint cable installs on the right side of the printer.
Note:  The frame end needs to be wrapped to inside of post for two full turns
Fuser removal
See “Fuser assembly, 115 V” on page 7-7, “Fuser assembly, 230 V” on page 7-7, or “Fuser assembly, 
100 V” on page 7-7 for the part number.
1.Turn off the printer.
2.Open the front access door.
3.Open the top access door.
4.Rotate the fuser thumbscrews (A) counterclockwise until loosened.
CAUTION
The fuser can be extremely hot. Use care when handling to avoid burns. 
						

							Repair information4-111
 5026
Go Back Previous
Next
5.Grasp the handles (B), slide the fuser out from the printer.
Installation note: If you install a new fuser, be sure to reset the fuser counter in the Configuration Menu, and 
run the Motor Calibration. To reset the counter and run the calibration: 
1.Enter the Configuration Menu. (Turn off the printer, press and hold buttons 2 and 6, turn on the printer, and 
release the buttons when the progress bar displays.)
2.Press   for the Reset value.
Resetting Fuser Count Value appears.
3.Select Motor Calibration from the CONFIG MENU. 
Calibrating displays, and the printer prints several blank pages and then returns to the CONFIG MENU.
4.Select Exit Config Menu. 
AB 
						

							4-112Service Manual 5026 
Go Back Previous
Next
Fuser AC cable removal
Note:  The LVPS to fuser AC cable is black.
1.Remove the top cover assembly. See “Top cover assembly removal” on page 4-58.
2.Turn the top cover assembly over.
3.Lift the locking latch (A) on the connector, slide the connector down, and remove the connector from the 
keyed hole.
4.Remove the cable from the cable openings (B).
Note:  Observe the routing of the cable for reinstallation. 
						

							Repair information4-113
 5026
Go Back Previous
Next
Fuser DC cable removal
Note:  The fuser to system board autoconnect cable is red.
1.Remove the top cover assembly. See “Top cover assembly removal” on page 4-58. 
2.Turn the top cover assembly over.
3.Remove the connector (A) from the top cover assembly.
Warning:  You will damage the old connector in the process. Be careful not to damage the top cover 
assembly.
4.Pull the cable through the hole (B) in the top cover assembly, and the notch (C). 
						

							4-114Service Manual 5026 
Go Back Previous
Next
Hard drive assembly removal
Warning:  This part might contain customer confidential information. See “Data Security Notice” on page 4-1 
for more details. After removing this part, return it to your next level of support so any data can be 
removed. If the customer requests to keep the part, they must sign a confirmation of memory device 
retention form.
1.Remove the rear frame cover. See “Rear frame cover removal” on page 4-47.
2.Remove the two screws (A), and squeeze the connector to disconnect the hard disk from the system 
board (B).
3.Pull the hard disk straight out to pop the hard drive standoffs free of the system board.