Lexmark C935 Series, Service Manual

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2-146
Printer Service Manual
5057-XXX
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Image quality trouble
Printer Related Troubleshooting
Note: First, get a printout as a base, and follow the symptom table to identify the possible failing FRU’s.
Image quality symptoms
•
Faint print (low contrast)— “Faint print (Low contrast)” on page 2-147 .
•
Blank print (no print)— “Blank print (no print)” on page 2-149 .
•
Solid black— “Solid black” on page 2-151 .
•
Vertical blank lines (White stripes in media transport direction)— “Vertical lines and bands (process
direction)” on page 2-152 .
•
Horizontal band— “Horizontal white stripes or bands (side to side direction)” on page 2-154
•
Vertical stripes— “Vertical stripes (process direction)” on page 2-156 .
•
Horizontal stripes— “Horizontal stripes (side to side direction)” on page 2-158 .
•
Partial lack— “Partial lack” on page 2-160 .
•
Spots— “Spots” on page 2-162 .
•
Afterimage— “After image” on page 2-163 .
•
Background (fog)— “Background (fog)” on page 2-165 .
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Skew— “Skew” on page 2-167 .
•
Media damage— “Media damage” on page 2-169 .
•
No fuse— “No fuse” on page 2-171 .
•
Color mis-registration—Go to “Color misregistration” on page 2-172 .
•
Deletions—Go to “Deletions” on page 2-173 .
•
High frequency bands—Go to “High frequency bands” on page 2-174 .
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.