Xerox M20 - WorkCentre B/W Laser, Service Manual

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December 2006
3-10 WorkCentre M20, 4118, FaxCentre 2218 Family
IQ5
Image Quality
IQ5 Vertical Black Lines or Bands RAP
Use this RAP when there are black lines or bands along the process direction, as shown in Fig-
ure 1.
Figure 1 Vertical black line and band
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.
1. If the defect is only present on received faxes, ensure the defect is not being generated
by the fax machine that is transmitting the fax.
2. If the defect is only present when making copies from the document glass, clean the MCT
glass scanner, PL 14.10 Item 12.
3. If the defect is only present when making copies from the DADF or ADF, clean the MCT
glass DADF, PL 14.10 Item 4
4. Lightweight media can cause fusing problems that may result in vertical lines. Ensure the
customer is using media that is within specification. Refer to GP 22 Paper and Media
Specifications.
5. The fuser may be contaminated. Make 10 blank copies. If necessary, install a ELA HOU -
fuser assembly, PL 10.15 Item 1.
6. Refer to the following:
• (M20F) Wiring Diagram 3
• (4118) Wiring Diagram 9
• (2218) Wiring Diagram 14
Check that the harness between the unit - LSU and the PBA main is correctly and
securely connected.
7. Install new components as necessary:
• ELA Unit - OPC drum set, PL 9.10 Item 1.
• ELA - toner unit set, PL 9.10 Item 2.
• Unit - LSU, PL 6.10 Item 1.