2RV/2RW/2RX/2RY/3RA-3
7-16
(2-2) Black dots
Step Check description Assumed cause Measures Reference
1 Executing Drum refresh The drum surface is dirty. Execute Drum refresh.
2 Replacing the drum unit There are some scratches
on the drum surface.
Replace the drum unit.
3 Cleaning the main charger
wire
The main charger wire sur-
face is dirty.
Clean the main charger wire
surface. If not repaired,
replace the main charger
unit.
4 Changing the settings Developer bias leaks. Execute [Altitude Adjustment]
at [System Menu/Counter]
key > [Adjustment/Mainte-
nance] > [Service Settings] to
set the proper mode.
5 Checking the developer
unit
The developer roller and
magnet roller are dirty or
faulty.
Clean the developer roller. If
not repaired, replace the
developer unit.
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