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printer’s Troubleshooting Print-Quality Problems pages or a specific print-quality
troubleshooting procedure for more information.
Imaging Unit
Streaks in Process Direction (in the direction of feed, parallel with paper travel)
Banding in Scan Direction (across the page, perpendicular to paper travel)
Uneven Density
Voids
Repeating Defects
Mis-registration
Transfer Unit
Toner on the back side of the printed page (simplex mode)
Light Prints
Repeating Defects
Mis-registration - only when there is obvious damage to the belt.
Fuser
Hot or Cold Offsetting
Repeating Defects
Dark Streaks in Process Direction
LED Head
Streaks in the Process Direction
Uneven Density in the Scan Direction
Test Prints
A variety of test prints are available to aid in determining the quality of output from the
printer and to assist in troubleshooting. See sections
2.8.3
and
2.8.5
for details.
3.2 Using New Consumable Units for Testing Purposes
The printer unit will allow you to utilize new consumable units for print quality diagnosis
and troubleshooting purposes.
Note!
When using new units (Drum, Transfer Belt, Fuser) to assist in troubleshooting,
you should
temporarily
set the printer to
“Factory Mode”
(See Section 2.8.8).
Setting
to factory mode will allow you to use brand new units for testing purposes without
cutting the fuse.
Caution!
Be sure to
reset the printer to “Shipping Mode”
when testing is complete.
Leaving the printer in Factory Mode may cause erratic operation of the MFP.
3.3 Things to observe when analyzing Test Pages
Streaks in Process Direction (in the direction of feed, parallel with paper travel)
Banding in Scan Direction (across the page, perpendicular to paper travel)
Uneven Density
Voids
Repeating Defects
Mis-registration
Note:
Consult the “Repeating Defect Spacing Chart” below.
