Iq15 Different Image Density (Left And Right) Rap; Iq16 Horizontal Bands Rap - Xerox WorkCentre 4150 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 roller pressure may be unbalanced. Check the spring pressure at each end,
PL 7.35 Item 22 and PL 7.35 Item 26. Install new components as necessary, PL 7.35.
2. Shake the toner module to evenly distribute the toner. If necessary, install a new toner
module, PL 9.10 Item 2.
3. Clean the xerographic drum, make 10 blank copies. If necessary, install a new xero-
graphic module, PL 9.10 Item 1.
4. Perform the Shading Test procedure, GP 15. If the shading test fails, install new compo-
nents as necessary:
• CCD module, PL 14.10 Item 2.
• CCD ribbon cable, PL 14.10 Item 7.
• Scanner assembly, PL 14.10 Item 1.
• Main PWB, PL 1.10 Item 1.
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.
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. Check the spring contacts in the terminal assembly, PL 4.15 Item 13. The spring contacts
supply the voltages to the xerographic module and the side cover assembly. If necessary,
clean the spring contacts. If necessary, install a new terminal assembly, PL 4.15 Item 13.
2. Clean the xerographic drum, make 10 blank copies. If necessary, install a new xero-
graphic module, 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.
Defect distance Roller
94mm (3.7 inches) Xerographic drum
38mm (1.5 inches) Charge roller
44mm (1.7 inches) Supply roller
57mm (2.2 inches) Transfer roller
126mm (4.9 inches) Heat roller
155mm (6.1 inches) Pressure roller
September 2006
3-16
Figure 1 Horizontal bands
WARNING
Table 1 Defect distance
Component Parts List Ref.
Xerographic module PL 9.10 Item 1
Xerographic module PL 9.10 Item 1
Xerographic module PL 9.10 Item 1
Transfer roller PL 7.35 Item 19
Fuser assembly PL 10.26 Item 13
Fuser assembly PL 10.26 Item 23
WorkCentre 4150