Lexmark C 746 Service Manual
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Repair information4-165 5026 Go Back Previous Next Top cover camshaft assembly removal See “Top cover camshaft assembly” on page 7-14 for the part number. 1.Open the front cover access door cover. 2.Open the top access cover. 3.Remove the two screws (A) from the links on either side, and disengage the links. 4.Rotate the top access cover back, and place a screwdriver in the cable hole in the frame to hold the cover in place.
4-166Service Manual 5026 Go Back Previous Next 5.Remove the fuser. See “Fuser removal” on page 4-110. 6.Remove the top screw (B), and loosen the other screw (C). This will allow you to flex the EP drive. 7.Remove the two screws (D).
Repair information4-167 5026 Go Back Previous Next 8.Rotate the camshaft up using the camshaft actuator handles (E) so you can access the other two screws (F), and remove them. 9.Flex the EP drive assembly to remove the right side of the camshaft from the boss (G), and lift to remove the camshaft.
4-168Service Manual 5026 Go Back Previous Next Installation notes: 1.On the left side, align the mark on the idler gear (A) with the mark on the camshaft gear (B), and slide the camshaft into place, meshing the gears on the left side. AB
Repair information4-169 5026 Go Back Previous Next 2.Rotate the camshaft up using the camshaft actuator handle (C), and make sure the gears on the right side mesh so the first gear tooth of the camshaft aligns with the first two gear teeth of the EP drive actuator rack (D). Note: Make sure the actuator rack on the EP drive is all the way back. 3.Flex the EP drive on the right to seat the end of the shaft into the boss (E) on the EP drive. 4.Make sure the left and right camshaft brackets are fully seated, and replace the two screws (F).
4-170Service Manual 5026 Go Back Previous Next 5.Rotate the camshaft using the camshaft actuator handle, and replace the two screws (G). 6.Replace the screw in the EP drive that allowed you to flex the EP drive, and tighten the other screw (see step 6 of the removal). 7.Replace the top access cover assembly. 8.Replace the fuser, the cartridges, and close the covers.
Repair information4-171 5026 Go Back Previous Next Transfer module removal See “Transfer module” on page 7-7 for the part number. 1.Disconnect the transfer module cable (A). 2.Press the two tabs (B) to release the front access cover assembly. 3.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, 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. BC A
4-172Service Manual 5026 Go Back Previous Next Note: If you are removing the transfer module to access another part, leave the photoconductor units attached, and you are done. If you need to replace the transport belt, continue with the next step to remove the separate photoconductor units. 4.Remove the photoconductor units. Lift the right end handle (D) of the photoconductor unit, releasing from the mount. 5.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 (E). Installation note: •Place the photoconductor units on the new transport belt, and reinstall. •Perform the Color Alignment in the Configuration Menu: 1.Enter Config Menu (turn off the printer, press and hold buttons 3 and 6, turn the printer on, and release the buttons when the clock graphic displays). 2.Select Color Alignment from the Configuration Menu. 3.Select Print Alignment Page. 4.Select Set A. 5.Consulting the printed page, follow the instructions on the operator panel to choose the best appearing line numbered 0 through 20 for line A. 6.Continue selecting the best lines for the sets through Set L. 7.Select Back ( ) to return to the Configuration main menu, and select Exit Config Menu.
Repair information4-173 5026 Go Back Previous Next Transport cable removal 1.Remove the LVPS. See “Low-voltage power supply (LVPS) removal” on page 4-119. 2.Remove the transport belt assembly. Leave the photoconductor units in place. See “Transfer module removal” on page 4-171. 3.Disconnect the transport cable from the system board at JTPS1 connector (A). Note: The cable connector on the system board end of the cable is smaller than the connector on the front access door, and it may be easier to get that end through the openings.
4-174Service Manual 5026 Go Back Previous Next 4.Extract the cable through the opening in the frame to the right side of the printer (B). 5.Remove the cable from the five cable restraints (C). 6.Remove the cable from the three openings in the cable channel (D) on the right side of the front access door. 7.Remove the six screws (E) from the cable shield.