Service manual

30 July, 2001 TROUBLESHOOTING GUIDE
4-33
4.4 TROUBLESHOOTING GUIDE
4.4.1 IMAGE QUALITY
The table below shows the troubleshooting procedure for the following image problems.
• Smeared image for 4C thin lines or White lines in solid image areas
• Dirty background
• Fireflies
• Crow marks
• Image density change
• Toner blasting
Subject Symptom Cause Action
Smeared image for 4C
thin lines or white lines
in solid image areas
4C thin lines become
smeared in the paper feed
direction or white lines
appear in solid image areas.
Spurs are located just before the fusing
section to prevent paper from touching
the fusing unit. When paper touches the
spurs and the spurs do not rotate, the
spurs scratch the mage.
Clean the edges of the spurs and change the
position of the spurs as shown below.
If 4C thin lines become smeared:
G060T501.WMF
If white lines appear in solid image areas:
G060T502.WMF