Lexmark C 746 Service Manual
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Repair information4-135 5026 Go Back Previous Next 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).
4-136Service Manual 5026 Go Back Previous Next 6.Press the tabs together to remove the option cable connector. Note: Be sure to note the cable routing for reinstallation.
Repair information4-137 5026 Go Back Previous Next 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.
4-138Service Manual 5026 Go Back Previous Next 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 transfer module with the photoconductor units on a clean surface. Never expose the photoconductor units to light for a prolonged period of time. Place a clean, dry cloth over the transfer module and photoconductor units until they are required. 8.Remove the toner cartridges. Warning: Do not touch the developer rolls. 9.Remove the four screws (G) from the bottom pan. EF D
Repair information4-139 5026 Go Back Previous Next 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 toner assembly removal” on page 4-176. 2.Replace the rear frame cover to protect the system board. 3.Turn the printer on its back. 4.Slide the paper pick assembly toward the back of the printer, and down to engage the tabs (A).
4-140Service Manual 5026 Go Back Previous Next 5.Engage the gear (B).
Repair information4-141 5026 Go Back Previous Next 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 units. 15.Close the front access cover. 16.Replace the paper tray.
4-142Service Manual 5026 Go Back Previous Next 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 left end of the photoconductor is released from the holding pin (B). Installation note: If a new photoconductor unit is installed, reset the life count value in the printer memory. •If a message appears on the operator panel: 1.When 84 PC Unit Life Warning or 84 Replace PC Unit appears, select Supply Replaced, and then press . Replace Supply displays. 2.Select Cyan PC Unit, Magenta PC Unit, Yellow PC Unit, or Black PC Unit based on the photoconductor unit that was just replaced, and then press . PC Unit Replaced displays. 3.Select Yes, and then press to clear the message. •If no message appears: 1.Press Menu (). 2.Select Supplies Menu, and press . 3.Press to select Replace Supply. 4.Select Cyan PC Unit, Magenta PC Unit, Yellow PC Unit, or Black PC Unit based on the photoconductor unit that was just replaced, and then press . PC Unit Replaced displays. Press to select Yes. A B
Repair information4-143 5026 Go Back Previous Next 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 tire assembly to avoid losing small parts. 1.Remove the paper tray. 2.Pull the paper pick arm (A) down. 3.Remove the pick arm roll (B) from the pick arm roll assembly (C). Repeat for the other pick arm roll (D). A BC D
4-144Service Manual 5026 Go Back Previous Next 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 the bottom of the printer. Installation note: Verify that the pad fully seats in the installation holes.