Iq16 Periodic Printing Defects Check Rap - Xerox WorkCentre M20 Service Manual

IQ16 Periodic Printing Defects Check RAP

Use this RAP when the printed image shows regular patterns in black or white, across the pro-
cess direction.
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.
1. Go to GP 3. Perform the Clean Drum routine. If necessary, install a new ELA - OPC unit
drum PL 9.10 Item 1.
2. Measure the distance between the repeated black or white abnormality. Refer to Table 1
identify the possible cause.
Table 1 Abnormal image distance
Defect dis- Kind of abnormal
tance image Roller
94.3mm White spot. Black ELA - OPC
spot unit drum
38.3mm White spot. Black Charge roller
spot
43.8mm Horizontal dark Supply roller
band
54.3mm Horizontal dark Developer
band roller
51.9mm Black side contami- Cleaning roller
nation/transfer fault
56.6mm Black spot, White Transfer roller
spot
82.6mm Black side contami- Heat roller
nation
91.1mm Kind of abnormal Pressure roller
image
Install new components as necessary.
3. If the defect appears to be fuser related, ensure that the paper tray settings match the
paper or media size in the trays. Also, ensure the media is within specification, refer to GP
22 Paper and Media Specifications.
Image Quality
IQ16
Parts List
Component Ref.
P/O ELA - OPC PL 9.10
unit drum Item 1
P/O ELA - OPC PL 9.10
unit drum Item 1
P/O ELA toner unit PL 9.10
set Item 2
P/O ELA toner unit PL 9.10
set Item 2
P/O ELA toner unit PL 9.10
set Item 2
Transfer roller PL 8.10
Item 33
P/O ELA HOU - PL 9.10
fuser assembly Item 4
P/O ELA HOU - PL 9.10
fuser assembly Item 4
March 2004
3-12 Work Centre M20 Family