April 2010
3-11
Phaser 3635MFP/WorkCentre 3550
IQ6
Image Quality
IQ6 Vertical White Lines RAP
Use this RAP when there are white lines along the process direction, as shown in Figure 1.
Ensure the IQ1 Image Quality Entry RAP is performed before starting this RAP.
Figure 1 Vertical white lines
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.
1. Determine the source of the problem. Make a print. Make a copy.
2. Refer to Wiring Diagram 3 (3635) (3635) or Wiring Diagram 12 (3550) (3550). If the defect
appears only in copy mode, perform the following:
a. Check the ribbon cable between the CCD module and CN8 (3635) or CN31 (3550)
on the
Main PWB.
b. Perform the Shading Test procedure, GP 15 Shading Test. If the shading test fails:
i. Install new components as necessary:
• (3635) CCD module, PL 14.10 Item 8.
• (3550) CCD module, PL 14.11 Item 2.
• (3635) CCD module cable, PL 14.10 Item 23.
• (3550) CCD module cable, PL 14.11 Item 5.
• (3635) Scanner assembly, PL 14.10 Item 26.
• (3550) Scanner assembly, PL 14.11 Item 21.
ii. Perform OF7 Main PWB Check RAP.
3. Remove the print cartridge, PL 9.10 Item 1. Ensure there are no obstructions that block
the LSU from imaging the print cartridge.
4. Remove the LSU, PL 6.10 Item 1. Clean the LSU window using a clean, lint-free cloth. If
necessary, install a new LSU, PL 6.10 Item 1.
5. Install a new print cartridge, PL 9.10 Item 1.
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