Xerox M20 - WorkCentre B/W Laser, Service Manual

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December 2006
2-29 WorkCentre M20, 4118, FaxCentre 2218 Family
OF4, OF5
Status Indicator RAPs
Solution:
– Install new components as necessary.
• Mis-adjusted or worn drive belts.
Solution:
– Install new components as necessary.
• Mis-aligned or damaged parts.
Solution:
– Check for parts that are damaged or out of position.
– Adjust the components if appropriate.
– Install new components as necessary.
• Noise from the DADH input tray document guides.
Solution:
– Clean the DADH input tray in the area beneath the input guides.
• Noise from the right side of the machine.
Solution:
– Lubricate the fuser bushes.
Unusual Noise from the ELA HOU Scanner Assembly
Possible causes are:
• Mis-aligned or damaged parts.
• Defective motor driver.
Solution:
• Check the position of the motor step - scan and associated gears, PL 14.11.
• Ensure the ELA HOU - CCD module, PL 14.11 Item 16, moves freely.
• Install new components as necessary.
Grinding Noise from the Exit Assembly
Possible causes are:
• Worn MEC - roller exit drive bearings, PL 10.10 Item 10, PL 10.10 Item 23 and PL 10.10
Item 24.
Solution:
• Check the MEC - roller exit drive bearings, PL 10.10 Item 10, PL 10.10 Item 23 and PL
10.10 Item 24.
• Install new components as necessary, PL 10.10.
Clicking Noise from the Front of the Machine
Possible causes are:
• Excessive waste toner build up in the ELA - toner unit set.
Solution:
• Go to the OF5 Waste Toner Contamination RAP.
OF5 Waste Toner Contamination RAP
Use this RAP if there is excessive waste toner contamination at the front of the machine.
Procedure
WARNING
Switch off the electricity to the machine. Disconnect the power cord from the customer
supply while performing tasks that do not need electricity. Electricity can cause death or
injury. Moving parts can cause injury.
NOTE: If necessary, refer to GP 20 for the acronym list and cross reference lists of more com-
monly recognised part names.
Waste toner contamination can be caused by waste toner building up in the ELA Unit - OPC
drum set and not falling into the ELA - toner unit set waste toner sump. Perform the following:
1. Make sure that the ELA - toner unit set, PL 9.10 Item 2 and the ELA Unit - OPC drum set,
PL 9.10 Item 1 are installed correctly.
2. Check that the actuator on the MEA unit - cover front assembly that opens the waste
toner door is not missing or damaged. If necessary, install a new MEA unit - cover front
assembly, PL 4.25 Item 6.
3. Remove the ELA - toner unit set, PL 9.10 Item 2, then the ELA Unit - OPC drum set, PL
9.10 Item 1.
4. Open the waste toner door on the ELA Unit - OPC drum set. While manually rotating the
photoreceptor drive coupling, empty the excess waste toner.
NOTE: The waste toner door is located on the underside of the ELA Unit - OPC drum set,
behind the latch.
5. Check that the two screws that secure the waste toner sump to the ELA - toner unit set
are not tight.
NOTE: The waste toner sump must not be firmly secured to allow it to correctly align with
the ELA - toner unit set.
6. Re-install the ELA Unit - OPC drum set. Check that the pin on the MEA unit - cover front
opens the waste toner door.
NOTE: When the door is closing, some resistance should be felt as the actuator on the
MEA unit - cover front assembly opens the waste toner door.
7. If necessary, install a new ELA Unit - OPC drum set, PL 9.10 Item 1.