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Symptom
Vertical Black Lines or
Bands
1) Wavy Lines
2) Dotted lines
or bands
3) Band at left or right
edge of the copy,
superimposed on the
data
4) Straight lines
or bands at constant
positions on the copy
• Replace the master if the cleaning blade is damaged.
• Pentagonal mirror motor fault.
• Replace the SMDR or pentagonal mirror motor. If the problem still occurs,
replace the UIB or FCU.
If the master belt is scratched, change the master unit and the part that is
doing the damage.
Make a printer test (see page 5-30). Is the output normal ?
Y
• Clean the laser optics (e.g., second cylindrical lens).
• Clean the scanner optics.
• Replace the fluorescent lamp.
Make a printer test (see page 5-30). Is the output normal ?
Y
Start a copy cycle and stop it just before the copy reaches the
fusing unit. Does the copy have the same lines on it ?
(Continued on next page)
Action
9 - 19
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