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User Check
(1) Clean the corona wire or the power grid of the drum unit.
(2) Refer to <Cleaning Method of the Drum Unit>，use a cotton
swab to clear the dust on the drum unit.
(3) Replace a new drum unit.
■ Black Vertical Line
Step
Cause
Solution
1
Corona wire has not been slid to
the end during cleaning.
Repositioning.
2
Dust or powder on the charger
unit.
Clean the charger of the drum unit. Refer
to the following Cleaning Method of the
Corona Wire.
3
Fuser unit malfunction(heating
rollers scratch)
Replace fuser unit.
TS
User Check
(1) Clean the corona wire or the power grid of the drum unit.
(2) Refer to <Cleaning Method of the Drum Unit>，use a cotton swab to clear the
dust on the drum unit.
(3) Drum unit may be worn out.
(4) Replace a new drum unit.
<Cleaning Method of Colona Wire>, Slide the corona wire to the end and then back to the
original place. Repeat this for at least 3 times.
Gray background
Step
Cause
Solution
1
OPC of Drum worn out.
Replace drum unit.
2
Toner cartridge near end of life.
Replace the toner cartridge.
3
Voltage of Transfer roller incorrect. Replace the fuser.
Confidential
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