Lexmark X940e Owners Manual
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Diagnostic aids3-51 7510 Go Back Previous Next Repeating defects Roll Pitch 2nd transfer roll 83.05 mm Registration roll 62.61 mm Developer magnetic roll 33.76 mm Developer auger roll 43.89 mm Fuser hot roll 85.15 mm Charge roll 43.98 mm PC drum 94.25 mm Transfer belt 949.00 mm Fuser pressure rollFuser hot roll 2nd transfer roll Registration rollPC drum Charge roll
Repair information4-1 7510 Go Back Previous Next 4. Repair information Warning: Read the following before handling electronic parts. Handling ESD-sensitive parts Many electronic products use parts that are known to be sensitive to electrostatic discharge (ESD). To prevent damage to ESD-sensitive parts, use the following instructions in addition to all the usual precautions, such as turning off power before removing logic boards: •Keep the ESD-sensitive part in its original shipping container (a special “ESD bag”) until you are ready to install the part into the machine. •Make the least-possible movements with your body to prevent an increase of static electricity from clothing fibers, carpets, and furniture. •Put the ESD wrist strap on your wrist. Connect the wrist band to the system ground point. This discharges any static electricity in your body to the machine. •Hold the ESD-sensitive part by its edge connector shroud (cover); do not touch its pins. If you are removing a pluggable module, use the correct tool. •Do not place the ESD-sensitive part on the machine cover or on a metal table; if you need to put down the ESD-sensitive part for any reason, first put it into its special bag. •Machine covers and metal tables are electrical grounds. They increase the risk of damage, because they make a discharge path from your body through the ESD-sensitive part. (Large metal objects can be discharge paths without being grounded.) •Prevent ESD-sensitive parts from being accidentally touched by other personnel. Install machine covers when you are not working on the machine, and do not put unprotected ESD-sensitive parts on a table. •If possible, keep all ESD-sensitive parts in a grounded metal cabinet (case). •Be extra careful in working with ESD-sensitive parts when cold-weather heating is used, because low humidity increases static electricity.
4-2Service Manual 7510 Go Back Previous Next Removal procedures Before starting service work Note: Some removal procedures require removing cable ties. You must replace cable ties during reassembly to avoid pinching wires, obstructing the paper path, or restricting mechanical movement. Note: A wide variety of screws are used; make note of their positions during service. CAUTION: Remove the power cord from the electrical outlet before you connect or disconnect any cable or electronic board or assembly. CAUTION: While performing service around the fuser assembly, ensure the fuser area has cooled down.
Repair information4-3 7510 Go Back Previous Next Printer front door assembly removal 1. Open the printer front door assembly. 2. Press the tab, and rotate the two flexible supports (A) 90°, and pull from the machine. 3. Remove the two flexible supports (A). 4. Remove the two screws securing the two brackets (B) to the printer front door assembly (C). 5. Remove the two brackets (B). 6. Remove the printer front door assembly (C). B ab A C T
4-4Service Manual 7510 Go Back Previous Next Right cover assembly removal Note: Detach the finisher if equipped. Refer to the MFP or Printer Finisher Service Manual. 1. Open the transfer belt unit access door (A). 2. Remove the three screws securing the right cover assembly (B) to the machine. 3. Move the right cover assembly (B) down, and pull out. 4. Remove the right cover assembly (B). Top cover assembly removal 1. Remove the base machine from the scanner/ADF stand assembly. 2. Open the printer front door assembly. 3. Remove the rear cover assembly. See “Rear cover assembly removal” on page 4-5. 4. Remove the right cover assembly. See “Right cover assembly removal” on page 4-4. 5. Remove the three screws securing the top cover assembly (A) to the machine. 6. Remove the top cover assembly (A). B A A
Repair information4-5 7510 Go Back Previous Next Rear cover assembly removal 1. Remove the blind cover (A). 2. Remove all connectors and power cords from the rear of the machine. 3. Remove the four screws securing the rear cover assembly (B) to the machine. 4. Remove the rear cover assembly (B). B A Connectors
4-6Service Manual 7510 Go Back Previous Next Rear left middle cover removal 1. Remove the rear cover assembly. See “Rear cover assembly removal” on page 4-5. 2. Open the printer left door assembly. 3. Remove the screw securing the rear left middle cover (A) to the machine. 4. Remove the rear left middle cover. A
Repair information4-7 7510 Go Back Previous Next Rear left upper cover removal 1. Remove the rear cover assembly. See “Rear cover assembly removal” on page 4-5. Warning: Ensure that the rear left middle cover is removed before removing the rear left upper cover, or damage will occur. 2. Remove the rear left middle cover. See “Rear left middle cover removal” on page 4-6. 3. Remove one screw securing the rear left upper cover (A) to the machine. 4. Release the hook securing the rear left upper cover (A) to the machine. 5. Remove the rear left upper cover (A). AHook
4-8Service Manual 7510 Go Back Previous Next Printer left lower door assembly removal 1. Remove the media tray 1. 2. Open the printer left lower door assembly. 3. Disconnect the connector from the printer left lower door assembly (A). 4. Release the harness from the clamp. 5. Pull the cap of the hinge pin (B) out with a prying tool to remove the hinge pin (B) from the machine. 6. Remove the hinge pin (B). 7. Remove the printer left lower door assembly (A). MPF feed unit assembly removal 1. Remove the rear cover assembly. See “Rear cover assembly removal” on page 4-5. 2. Remove the rear left middle cover. See “Rear left middle cover removal” on page 4-6. 3. Disconnect the connector from the MPF feed unit assembly (A). 4. Detach the frame clamp from the machine. 5. Remove the two screws securing the MPF feed unit assembly (A) to the machine. 6. Remove the MPF feed unit assembly (A). Clamp Connector B A Cap Connector Frame clamp A