5 Background
[Symptom]
Toner attached to the overall white area and background is slightly colored.
A: If the background is created at the process section, see probable cause A.
B: If the background contains the data (like following figure), see probable cause B.
[Probable causes and solutions]
Paper edge
Background
appears from approx 3mm inside from the paper
edge.
Linear boundary can be seen.
Dots or lines line regularly.
Enlargement of area for judgment
A: The environment condition changed.
Perform one or more of following adjustments:
►
Service mode => [02 Process adjustment] => [04 Process fine adjustment] => [01
Covered margin fine adj]: Increase the set value to depress the background. After
setting, perform auto gamma adjustment.
►
Service mode => [02 Process adjustment] => [04 Process fine adjustment] => [03
Develop AC frequency]: Increase the set value to depress the background. After
setting, perform auto gamma adjustment.
►
Service mode => [02 Process adjustment] => [04 Process fine adjustment] => [04
Toner density fine adjustment]: Decrease the set value to improve the background.
B: The cause is in the output data.
For the correction, check and correct (remove the dots and the lines from) the image data.
Table of contents
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