Iq15 Horizontal Bands Rap - Xerox WorkCentre M20 Service Manual

IQ15 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
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. Check the high voltage spring contacts and clean if necessary. Check that the contact is
good.
2. Go to GP 3. Perform the Clean Drum routine. If necessary, install a new ELA - OPC unit
drum 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 Roller
94.3mm ELA - OPC unit drum
38.3mm Charge roller
43.8mm Supply roller
54.3mm Developer roller
Work Centre M20 Family
Component Parts List Ref.
P/O ELA - OPC unit drum PL 9.10 Item 1
P/O ELA - OPC unit drum PL 9.10 Item 1
P/O ELA toner unit set PL 9.10 Item 2
P/O ELA toner unit set PL 9.10 Item 2
Defect distance Roller
51.9mm Cleaning roller
56.6mm Transfer roller
82.6mm Heat roller
91.1mm Pressure roller
Install new components as necessary.
4. Clean the charge roller and if necessary, install a new ELA - OPC unit set, PL 9.10 Item 1.
5. Check the condition of the ELA HOU - fuser assembly and if necessary, install a new ELA
HOU - fuser assembly, PL 9.10 Item 4.
6. If necessary, install a new PBA main, PL 1.10 Item 9.
March 2004
3-11
Table 1 Defect distance
Component Parts List Ref.
P/O ELA toner unit set PL 9.10 Item 2
Transfer roller PL 8.10 Item 33
P/O ELA HOU - fuser PL 9.10 Item 4
assembly
P/O ELA HOU - fuser PL 9.10 Item 4
assembly
Image Quality
IQ15