Xerox WorkCentre 3550 - IQ8 Dark Image RAP; IQ9 Background RAP

April 2010
3-13
Phaser 3635MFP/WorkCentre 3550
IQ8, IQ9
Image Quality
IQ8 Dark Image RAP
Use this RAP when the machine produces dark images in all modes.
Ensure the IQ1 Image Quality Entry RAP is performed before starting this RAP.
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.
Perform the following:
1. Ensure that the paper tray settings match the paper or media size in the trays.
2. 3635 only. Perform the Shading Test procedure, GP 15 Shading Test. If the shading test
fails, install new components as necessary:
• CCD module, PL 14.10 Item 8.
• CCD module cable, PL 14.10 Item 23.
• Scanner assembly, PL 14.10 Item 26.
3. 3550 only. Perform the Shading Test procedure, GP 15 Shading Test. If the shading test
fails, install new components as necessary:
• CCD module, PL 14.11 Item 2.
• CCD module cable, PL 14.11 Item 5.
• Scanner assembly, PL 14.11 Item 21.
4. Refer to Wiring Diagram 2. Perform the following:
• Check the spring contacts between the HVPS PL 1.10 Item 3 and the print cartridge
PL 9.10 Item 1. The spring contacts supply the voltages to the print cartridge. If nec-
essary, clean the spring contacts.
• If necessary, install a new HVPS, PL 1.10 Item 3.
5. Perform OF7 Main PWB Check RAP.
IQ9 Background RAP
Use this RAP when the printed sheets have a dark or spotted background, as shown in Figure
1.
Ensure the IQ1 Image Quality Entry RAP is performed before starting this RAP.
Figure 1 Background
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.
Perform the following:
1. Ensure the DADF is closed. Room illumination can be transmitted through thin originals.
2. Ensure the machine is being operated in the correct environmental conditions. Refer to
GP 7 Machine Specifications.
3. The xerographic drum may be contaminated, make 10 blank copies. If necessary, install a
new print cartridge,
PL 9.10 Item 1.
4. Check the transfer roll, PL 9.10 Item 2. Make sure the transfer roll is clean and moves up
and down smoothly. If necessary, install a new transfer roll, PL 9.10 Item 2.
5. Refer to Wiring Diagram 2. Perform the following:
• Check the spring contacts between the HVPS, PL 1.10 Item 3, and the print car-
tridge PL 9.10 Item 1. The spring contacts supply the voltages to the print cartridge.
If necessary, clean the spring contacts.
• Install a new HVPS, PL 1.10 Item 3.