Iq15 Different Image Density (Left And Right) Rap; Iq16 Horizontal Bands Rap - Xerox Phaser 3635MFP Service Manual

IQ15 Different Image Density (Left and Right) RAP

Use this RAP when the printed sheets have different areas of image density across the pro-
cess direction. An example is shown in Figure 1.
Figure 1 Image density
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. The transfer roll pressure may be unbalanced. Check the spring pressure at each end, PL
9.10. Install new components as necessary, PL 9.10.
2. Shake the print cartridge to evenly distribute the toner. If necessary, install a new print
cartridge, PL 9.10 Item 1.
3. If necessary, install a new print cartridge, PL 9.10 Item 1.
4. Perform the Shading Test procedure, GP 15. If the shading test fails:
a. 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.
b. Perform OF7 Main PWB Check RAP.
Image Quality
IQ15, IQ16

IQ16 Horizontal Bands RAP

Use this RAP when the image has bands appearing across the process direction. An example
is shown in Figure 1.
Figure 1 Horizontal bands
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.
Perform the following:
1. Refer to Wiring Diagram 2. 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 necessary, clean the spring contacts.
2. If necessary, install a new print cartridge, PL 9.10 Item 1.
3. Measure the distance between the image and the defect. Refer to Table 1 to determine
the possible cause of the defect.
Table 1 Defect distance
Defect distance Roll
95mm (3.7 inches) Xerographic drum
38mm (1.5 inches) Charge roll
45mm (1.8 inches) Supply roll
47mm (1.9 inches) Transfer roll
89mm (3.5 inches) Heat roll
51mm (2 inches) Pressure roll 1
64mm (2.5 inches) Pressure roll 2
3-16
WARNING
Component Parts List Ref.
Print cartridge PL 9.10 Item 1
Print cartridge PL 9.10 Item 1
Print cartridge PL 9.10 Item 1
Transfer roll PL 9.10 Item 2
Fuser assembly PL 10.15 Item 1
Fuser assembly PL 10.15 Item 2
Fuser assembly PL 10.15 Item 3
Phaser 3635MFP
Draft 4