2RV/2RW/2RX/2RY/3RA-3
7-20
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Step Check description Assumed cause Measures Reference
1 Reinstalling the drum unit The drum unit or main
charger unit is not attached
properly.
Reattach the main charger
unit to the drum unit and reat-
tach the drum unit to the main
unit so that it is securely
grounded.
2 Checking the main charger
contact
The main charger contact
is dirty or deformed.
Clean the main charger con-
tact and correct it for secure
grounding.
3 Checking the developer
bias contact
The developer bias contact
is dirty or deformed.
Clean the developer bias
contact or correct it to secure
ground.
4 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.
ā¢ LSU (APC PWB) - Main/
engine PWB (YC505)
5 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.
ā¢ High voltage PWB - Main/
engine PWB (YC16)
6 Replacing the high voltage
PWB
The high voltage PWB is
faulty.
Replace the high voltage
PWB.
7 Replacing the LSU The LSU is dirty or faulty. Replace the LSU.
8 Replacing the main/engine
PWB
The main/engine PWB is
faulty.
Replace the main/engine
PWB.
Step Check description Assumed cause Measures Reference
1 Executing Drum refresh The drum surface is dirty. Execute Drum refresh.
2 Cleaning / replacing the
transfer roller
The transfer roller is dirty
or deformed.
Clean the transfer roller. If not
repaired, replace the transfer
roller.
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