2RV/2RW/2RX/2RY/3RA-3
7-19
(2-6) Vertical streaks and bands (black)
(2-7) Blank image
Step Check description Assumed cause Measures Reference
1 Executing Drum refresh The drum surface is dirty. Execute Drum refresh.
2 Replacing the drum unit The drum surface is worn
down.
Replace the drum unit.
3 Cleaning the main charger
wire
Streaky dirt adhere to the
main charger wire surface.
Clean the main charger wire
surface.
4 Replacing the main char-
ger unit
The main charger wire sur-
face is altered.
Replace the main charger
unit.
5 Checking the developer
unit
Foreign objects are on the
developer roller surface.
Clean the developer roller. If
not repaired, replace the
developer unit.
Step Check description Assumed cause Measures Reference
1 Checking the developer
bias contact
The developer bias contact
is dirty or deformed.
Clean the developer bias
contact, or correct its shape
so that it grounds securely.
2 Replacing the developer
unit
The developer unit side
gear is faulty.
Replace the developer unit.
3 Checking the connection The FFC is not properly
connected or faulty.
Reconnect the FFC. If the
FFC terminal is peel,
deformed or broken, replace
it.
• LSU (APC PWB) - Main/
engine PWB (YC505)
4 Checking the connection The connector is not prop-
erly connected or the wire
is faulty.
Clean the terminal of the fol-
lowing wire connectors and
reconnect the connectors. If
there is no continuity, replace
the wire.
• High voltage PWB - Main/
engine PWB (YC16)
5 Checking the developer
clutch
The developer clutch or
drive parts do noto operate
properly.
Reattach the developer
clutch and reconnect the con-
nector. If not repaired,
replace it.
6 Replacing the high voltage
PWB
The high voltage PWB is
faulty.
Replace the high voltage
PWB.
7 Replacing the LSU The APC PWB in the LSU
is faulty.
Replace the LSU.
8 Replacing the main/engine
PWB
The main/engine PWB is
faulty.
Replace the main/engine
PWB.
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