Lexmark C 746 Service Manual

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Option cable removal
1.Remove the LVPS. See “Low-voltage power supply (LVPS) removal” on page 4-119.
2.Disconnect the cable connector at JOPT1 (A) on the system board.
3.Replace the rear frame cover to protect the system board.
4.Position the printer on its back.
5.Remove the two screws (B). 

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6.Press the tabs together to remove the option cable connector.
Note:  Be sure to note the cable routing for reinstallation. 

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Paper pick mechanism assembly removal
See “Paper pick assembly” on page 7-7 for the part number.
1.Remove the paper tray.
2.Remove the waste toner assembly. See “Waste toner assembly removal” on page 4-176. 
3.Remove the rear frame cover. See “Rear frame cover removal” on page 4-47.
4.Disconnect the connector in JFDPCK1 (A) and JTRAY1 (B) on the system board.
5.Push the cables through the hole in the frame (C).
6.Open the front access cover. 

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7.Remove the transfer module with the photoconductor units attached. 
a.Disconnect the transfer module cable (D). 
b.Press the two tabs (E) to release the front access cover assembly, and lower the front access door 
cover.
c.Press the two tabs (F) 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, place the...

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10.With one hand, disengage the gear (H), then grasp the paper pick assembly, and pull forward and 
downward to disengage the assembly until the front (J) and rear locking tabs release (not visible).
11.Lower the paper pick mechanism, and remove through the front of the printer. 
Note:  Make sure the JTRAY1 and JTRAY2 connectors do not bind when passing through the frame 
access hole.
Installation notes:
1.Remove the waste toner assembly. See “Waste...

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5.Engage the gear (B).  

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6.Reach into the printer, and replace the front right screw (C) to secure the paper pick assembly.
7.Set the printer upright.
8.Secure the remaining three screws (D).
9.Remove the rear frame cover.
10.Route the cables through the hole in the frame, and connect them to JFDPCK1 (E) and JTRAY1 (F).
11.Replace the rear frame cover.
12.Replace the waste toner assembly. 
13.Replace the toner cartridges.
14.Replace the transfer module with the photoconductor...

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Photoconductor unit removal
Not a FRU
Warning:  To avoid damaging the photoconductor drum, hold the photoconductor units by their handle and 
place the photoconductor units on a clean surface. See “Handing the photoconductor unit” on 
page 4-2 for additional information.
1.Open the front access door.
2.Lift the right end handle (A) of the photoconductor unit, releasing from the mount.
3.Lift the unit up and away from the left side of printer, ensuring the...

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Pick arm roll removal and replacement
See “Pick arm roll” on page 7-7 for the part number.
The auto compensator pick roll tires are located in the base printer. There are also tires in all input options. If you 
have additional input options, and you are having problems with media picking, replace these tires also. Always 
replace the pick arm rolls in pairs. The rolls come in a package of two.
Warning:  Remove only the rubber tires and not the pick...

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Installation notes: Install the new rubber tires with the surface texture turning in the direction as shown.
Note:  Feel the rubber surface to verify it turns properly in the direction shown.
Printer pad removal
1.Slide the corner of the printer containing the damaged pad over the corner of the table. 
2.Remove the side cover that corresponds to the damaged pad so you can see if the pad fully seats in the 
installation holes.
3.Pull the pad tabs (A) from...