Iq3 Blurred Image From The Scanner Rap; Iq4 Vertical Black Lines Or Bands Rap - Xerox WorkCentre M20 Service Manual

IQ3 Blurred Image From the Scanner RAP

Use this RAP when the scanner produces blurred images.
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.
Perform the following:
1. Ensure that the gap between the original and the scanner glass, MCT glass DADF, PL
14.10 Item 4, is less than 0.5mm.
2. If necessary, go to GP 6 Maintenance, and perform the Adjust Shading procedure.
Image Quality
IQ3, IQ4

IQ4 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
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, clean the MCT glass scanner, PL 14.10
Item 12.
3. If the defect is only present when making copies from the DADF, 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.
5. The fuser may be contaminated. Make 10 blank copies. If necessary, install a ELA HOU -
fuser assembly, PL 9.10 Item 4.
6. Refer to Wiring Diagram 3. Check that the harness between the unit - LSU and the PBA
main is correctly and securely connected.
7. Install new components as necessary:
• ELA - OPC unit set, PL 9.10 Item 1.
• ELA - toner unit set, PL 9.10 Item 2.
• Unit - LSU, PL 6.10 Item 1.
March 2004
3-4
WARNING
Work Centre M20 Family