Sharp AR-M550N Service Manual page 386

Main Sub
Title Drum motor lock detection
code code
L4 02 Phenomenon Display
Details
Section
Operation
mode
Note
Case 1 Trouble
position/
Cause
Remedy
Note
Case 2 Trouble
position/
Cause
Remedy
Note
Main Sub
Title Fusing motor lock detection
code code
L4 03 Phenomenon Display
Details
Section
Operation
mode
Note
Case 1 Trouble
position/
Cause
Remedy
Note
Case 2 Trouble
position/
Cause
Remedy
Note
Lamp
Message
Drum motor lock
detection
The motor lock signal is
detected for 1.5sec
during rotation of the
drum motor.
Engine
Drum motor trouble
Use SIM 6-1 to check the
drum motor operation.
Improper connection of
the harness between the
PCU PWB and the drum
motor
Control circuit trouble
Check the harness and
the connector of the PCU
PWB, and the drum
motor.
Lamp
Message
Fusing motor lock
detection
Three successive trouble
signals are detected after
600 msec from starting
the fusing motor.
Engine
Fusing motor trouble
Use SIM 6-1 to check the
fusing motor operation.
Improper connection of
the harness between the
PCU PWB and the fusing
motor
Control circuit trouble
Check connection of the
harness and the
connector between the
PCU PWB and the fusing
motor.
AR-M550/M620/M700 SELF DIAG MESSAGE AND TROUBLESHOOTING 9 - 31
Main Sub
Title Developing motor lock detection
code code
L4 04 Phenomenon Display
Details
Section
Operation
mode
Note
Case 1 Trouble
position/
Cause
Remedy
Note
Case 2 Trouble
position/
Cause
Remedy
Note
Main Sub Transfer belt separation motor
Title
code code trouble detection
L4 06 Phenomenon Display
Details
Section
Operation
mode
Note
Case 1 Trouble
position/
Cause
Remedy
Note
Case 2 Trouble
position/
Cause
Remedy
Note
Lamp
Message
Developing motor lock
detection
The motor lock signal is
detected for 1.5sec
during rotation of the
developing motor
Engine
Developing motor trouble
Use SIM 6-1 to check the
developing motor
operation.
Improper connection of
the harness between the
PCU PWB and the
developing motor
Control circuit trouble
Check the harness and
the connector between
the PCU PWB and the
developing motor.
Lamp
Message
Transfer belt separation
motor trouble detection
The transfer belt home
position sensor ON/OFF
is not detected within the
specified time (4 sec)
during operation of the
transfer belt (separation,
contact).
Engine
Transfer belt separation
motor trouble
Use SIM 6-1 to check the
transfer belt motor
operation.
Improper connection of
the harness between the
PCU PWB and the
transfer belt separation
motor.
Control circuit trouble
Check connection of the
harness and the
connector between the
PCU PWB and the fusing
motor.