Read Sharp MX-M350N / MX-M350U / MX-M450N / MX-M450U (serv.man8) Service Manual online
MX-M350/M450 N/U TROUBLE CODES 11 - 12
U2
81
Content
Memory check sum error (Scanner)
Details
Scanner memory check sum error
Cause
EEPROM trouble
EEPROM which is not initialized is
installed.
Control circuit freeze by noises
Scanner PWB EEPROM access circuit
trouble
EEPROM which is not initialized is
installed.
Control circuit freeze by noises
Scanner PWB EEPROM access circuit
trouble
Check &
Remedy
Remedy
Check that EEPROM is set properly.
Record counter/adjustment values with
the simulation to protect the data from
being deleted.
Cancel U2 trouble with SIM 16.
Replace scanner PWB.
Record counter/adjustment values with
the simulation to protect the data from
being deleted.
Cancel U2 trouble with SIM 16.
Replace scanner PWB.
90
Content
EEPROM read/write error (PCU)
Detail
PCU EEPROM write error
Cause
EEPROM trouble
PCU PWB EEPROM access circuit
trouble
PCU PWB EEPROM access circuit
trouble
Check and
remedy
remedy
Check that EEPROM is properly
inserted.
Record counter/adjustment values with
the simulation to protect the data from
being deleted.
Use SIM16 to cancel U2 trouble.
Replace the Controller PWB.
inserted.
Record counter/adjustment values with
the simulation to protect the data from
being deleted.
Use SIM16 to cancel U2 trouble.
Replace the Controller PWB.
91
Content
Memory check sum error (PCU)
Detail
PCU memory check sum error
Cause
EEPROM trouble
EEPROM which is not initialized is
installed.
EEPROM is not initialized.
PCU PWB EEPROM access circuit
trouble
Hang of control circuit due to noises
EEPROM which is not initialized is
installed.
EEPROM is not initialized.
PCU PWB EEPROM access circuit
trouble
Hang of control circuit due to noises
Check and
remedy
remedy
Check that EEPROM is properly
inserted.
Save the counter/adjustment values
with the simulation.
Use SIM16 to cancel U2 trouble.
Replace the Controller PWB.
inserted.
Save the counter/adjustment values
with the simulation.
Use SIM16 to cancel U2 trouble.
Replace the Controller PWB.
U6
00
Content
Desk/LCC communication trouble
Detail
Desk/LCC communication error
Communication cable test error after
turning on the power or exiting SIM.
Communication cable test error after
turning on the power or exiting SIM.
Cause
Improper connection or disconnection
of connector and harness
Desk control PWB trouble
Control PWB (PCU) trouble
Noise or interference
of connector and harness
Desk control PWB trouble
Control PWB (PCU) trouble
Noise or interference
Check and
remedy
remedy
Canceled by turning OFF/ON the
power.
Check connection of the harness and
connector in the communication line.
power.
Check connection of the harness and
connector in the communication line.
01
Content
Desk/LCC No. 1 tray lift-up trouble
Detail
Desk/LCC No. 1 tray lift-up trouble
Cause
Sensor trouble
Tray trouble
Defective connection or disconnection
between the PWB and the motor.
Desk control PWB trouble
Lift-up motor trouble
Tray trouble
Defective connection or disconnection
between the PWB and the motor.
Desk control PWB trouble
Lift-up motor trouble
Check and
remedy
remedy
Use SIM4-2 to check the upper limit
sensor detection.
Use SIM4-3 to check the lift-up motor
operation.
sensor detection.
Use SIM4-3 to check the lift-up motor
operation.
MAIN SUB
Details
U6
02
Content
Desk No. 2 tray/LCC1 lift-up trouble
Detail
Desk No. 2 tray/LCC lift-up trouble
Cause
Sensor trouble
Tray trouble
Defective connection or disconnection
between the PWB and the motor.
Desk control PWB trouble
Lift-up motor trouble
Tray trouble
Defective connection or disconnection
between the PWB and the motor.
Desk control PWB trouble
Lift-up motor trouble
Check and
remedy
remedy
Use SIM4-2 to check the upper limit
sensor detection.
Use SIM4-3 to check the lift-up motor
operation.
sensor detection.
Use SIM4-3 to check the lift-up motor
operation.
03
Content
Desk No. 3 tray/LCC2 lift-up trouble
Detail
Desk no. 3 tray lift-up trouble
Cause
Sensor trouble
Tray trouble
Defective connection or disconnection
between the PWB and the motor.
Desk control PWB trouble
Lift-up motor trouble
Tray trouble
Defective connection or disconnection
between the PWB and the motor.
Desk control PWB trouble
Lift-up motor trouble
Check and
remedy
remedy
Use SIM4-2 to check the upper limit
sensor detection.
Use SIM4-3 to check the lift-up motor
operation.
sensor detection.
Use SIM4-3 to check the lift-up motor
operation.
10
Content
Desk/LCC transport motor trouble
Detail
Desk/LCC transport motor operation
trouble
trouble
Cause
Motor lock
Drive abnormality
Defective connection or disconnection
between the PWB and the motor.
Motor rpm abnormality
Overcurrent to the motor
Desk control PWB trouble
Drive abnormality
Defective connection or disconnection
between the PWB and the motor.
Motor rpm abnormality
Overcurrent to the motor
Desk control PWB trouble
Check and
remedy
remedy
Use SIM4-3 to check the transport
motor operation.
motor operation.
U7
00
Content
RIC communication trouble
Detail
RIC communication trouble
Communication cable test error after
turning on the power or exiting SIM.
Communication cable test error after
turning on the power or exiting SIM.
Cause
Disconnection of connector and
harness
RTC control PWB trouble
Control PWB (ICU) trouble
Noise or interference
harness
RTC control PWB trouble
Control PWB (ICU) trouble
Noise or interference
Check and
remedy
remedy
Canceled by turning OFF/ON the
power.
Check connector and harness in the
communication line.
power.
Check connector and harness in the
communication line.
EE
EL
Content
Auto developer adjustment trouble
(Over-toner)
(Over-toner)
Detail
The toner concentration output is
detected as 1.5V or below in the auto
development adjustment.
detected as 1.5V or below in the auto
development adjustment.
Cause
Toner concentration sensor trouble
Charging voltage, developing voltage
abnormality
Insufficient toner concentration
Developing unit trouble
PCU PWB trouble
Charging voltage, developing voltage
abnormality
Insufficient toner concentration
Developing unit trouble
PCU PWB trouble
Check and
remedy
remedy
Use SIM25-2 to perform auto developer
adjustment.
adjustment.
MAIN SUB
Details
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