5/2011
3-20
Phaser 4600/4620 Printer Service Manual
IQ18, IQ19
Revision - Xerox Internal Use Only
Image Quality
IQ18 Registration
The image is positioned incorrectly in either the process or scan direction.
Initial Actions
•
Check the Duplex Unit media size setting on the Duplex Unit.
•
Check the customer’s application settings.
•
Check that the paper supply is new, dry, and loaded correctly.
•
Check that the paper tray guides are set correctly.
•
Check that components in the paper path are clean and unobstructed.
If registration defects occur on duplex prints only, replace the Duplex Unit. If registration
defects occur on prints sourced from all trays in the process direction, replace the Registration
Assembly.
If registration defects occur from a specific tray in the process direction, check these compo-
nents in sequence and replace as necessary:
•
Feed, Nudger, Retard Rollers
•
Take Away Clutch
•
Feeder Assembly
•
Registration Assembly
If registration defects occur In the cross-process direction, check these components in
sequence and replace as necessary:
•
Laser Unit
•
IP Board
•
Drum Cartridge
•
Tray
To make registration and margin adjustments, use
dC131
to adjust NVRAM values.
Procedure
Measure the registration on two consecutive test prints. Registration is within specification,
refer to
IQS 3
.
Y
N
Print test prints from all input sources to isolate the defective component.
Perform
IQ5
Skew.
IQ19 Curved Vertical Lines
When printing, vertical lines are not straight.
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.
Initial Actions
•
Cycle system power.
•
Check connections from the HVPS to the Drum Cartridge.
•
Check AC supply and power cord.
Figure 1 Curved vertical lines defect example
Procedure
Remove the Drum Cartridge and clean the electrical contacts. Replace the Drum Cartridge and
print a test print. The vertical curved lines defect is visible.
Y
N
Perform SCP 6 Final Actions
Check HVPS operation and bias contacts to the Drum Cartridge. The HVPS is good.
Y
N
Replace the HVPS.
Check connections between the Laser Unit and IP Board. The connections are secure.
Y
N
Replace the Laser Unit.
Replace the MCU Board.
