Image Quality Trouble; Troubleshooting - Lexmark W850n Service Manual

Image quality trouble

Troubleshooting

Note: First, get a printout as a base, follow the symptom table to identify the possible failing FRUs.
Image quality symptoms:
•
Faint print (low contrast)
•
Blank print (no print)
•
Solid black "Solid black" on page
•
Vertical blank lines (White stripes in media transport direction)
media transport direction)" on page
•
Horizontal band
•
Printhead out
•
Vertical stripes
•
Horizontal stripes
•
Partial lack
•
Spots "Spots" on page
•
Afterimage "After image" on page
•
Background (fog)
•
Skew "Skew" on page
•
Media damage
•
No fix "No fuse" on page
Note: When horizontal lines and/or spots occur periodically, it is possibly caused by a particular roll. In this
case, measure the interval on the print test, and check the relation to the roll in the printer. The interval does not
necessarily match circumference of the roll.
"Faint print (Low contrast)" on page
"Blank print (no print)" on page
2-88.
2-89.
"Horizontal band printheads out" on page
"913.00 Printhead assembly failure" on page
"Vertical stripes" on page
"Horizontal stripes" on page
"Partial lack" on page 2-97.
2-98.
2-99.
"Background (fog)" on page
2-102.
"Media damage" on page
2-104.
2-84.
2-86.
"Vertical blank lines (white stripes in
2-91.
2-49.
2-93.
2-95.
2-100.
2-103.
4024-110
2-83
Diagnostic information
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