Sharp AR-M550 (serv.man16) Service Manual ▷ View online
AR-M550/M620 SELF DIAG MESSAGE AND TROUBLESHOOTING 9 - 33
Main
code
code
Sub
code
Title
Controller fan motor lock detection
L4
30
Phenomenon
Display
Lamp
Message
Message
Details
Controller fan motor lock
detection
The motor lock signal is
detected during rotation
of the controller fan
motor.
The motor lock signal is
detected during rotation
of the HDD fan motor.
detection
The motor lock signal is
detected during rotation
of the controller fan
motor.
The motor lock signal is
detected during rotation
of the HDD fan motor.
Section
Controller
Operation
mode
Note
mode
Note
Case 1
Trouble
position/
Cause
position/
Cause
Fan motor trouble
Remedy
Use SIM 6-2 to check the
fan motor operation.
fan motor operation.
Note
Case 2
Trouble
position/
Cause
position/
Cause
Improper connection of
the harness between the
controller PWB and the
fan motor.
Control circuit trouble
the harness between the
controller PWB and the
fan motor.
Control circuit trouble
Remedy
Check the harness and
the connector between
the controller PWB and
the fan motor.
the connector between
the controller PWB and
the fan motor.
Note
Main
code
code
Sub
code
Title
Paper discharging fan trouble
L4
31
Phenomenon
Display
Lamp
Message
Details
When a value detected
by the temperature
sensor (TH_EX) in the
paper discharging
reverse unit exceeds a
100°C.
by the temperature
sensor (TH_EX) in the
paper discharging
reverse unit exceeds a
100°C.
Section
Engine
Operation
mode
mode
Note
Case 1
Trouble
position/
Cause
position/
Cause
Fan motor trouble
Remedy
Use SIM 6-2 to check the
fan motor operation.
fan motor operation.
Note
Case 2
Trouble
position/
Cause
position/
Cause
PCU PWB, harness
connection between fan
and motor trouble
PCU circuit trouble
Thermistor (TH_EX)
trouble
connection between fan
and motor trouble
PCU circuit trouble
Thermistor (TH_EX)
trouble
Remedy
Check the PCU PWB, the
harness between fan and
motor, and the connector.
harness between fan and
motor, and the connector.
Note
Main
code
code
Sub
code
Title
Polygon motor lock detection
L6
10
Phenomenon
Display
Lamp
Message
Message
Details
Polygon motor lock
detection
It is judged that the
polygon motor lock signal
of the LSU is not
outputted.
The polygon motor lock
signal is checked in an
interval of 10sec after
starting the polygon
motor, and it is found that
the polygon motor is not
rotating normally.
detection
It is judged that the
polygon motor lock signal
of the LSU is not
outputted.
The polygon motor lock
signal is checked in an
interval of 10sec after
starting the polygon
motor, and it is found that
the polygon motor is not
rotating normally.
Section
Engine
Operation
mode
mode
Note
Case 1
Trouble
position/
Cause
position/
Cause
Polygon motor trouble
Remedy
Use SIM 61-1 to check
the polygon motor
operation.
the polygon motor
operation.
Note
Case 2
Trouble
position/
Cause
position/
Cause
Disconnection or
breakage of the LSU
connector or the harness
in the LSU
breakage of the LSU
connector or the harness
in the LSU
Remedy
Check connection of the
harness and the
connector.
Replace the LSU.
harness and the
connector.
Replace the LSU.
Note
Main
code
code
Sub
code
Title
No full wave signal
L8
01
Phenomenon
Display
Lamp
Message
Message
Details
The full wave signal is not
detected.
detected.
Section
Engine
Operation
mode
mode
Note
Case 1
Trouble
position/
Cause
position/
Cause
Disconnection or
breakage of the PCU
PWB connector or the
harness in the power unit
breakage of the PCU
PWB connector or the
harness in the power unit
Remedy
Check connection of the
harness and the
connector.
harness and the
connector.
Note
Case 2
Trouble
position/
Cause
position/
Cause
PCU PWB trouble
Remedy
Replace the PCU PWB.
Note
Case 3
Trouble
position/
Cause
position/
Cause
12V power source trouble
Remedy
Replace the power unit.
Replace the controller
connection mother board.
Replace the controller
connection mother board.
Note
AR-M550/M620 SELF DIAG MESSAGE AND TROUBLESHOOTING 9 - 34
Main
code
code
Sub
code
Title
RIC copy inhibit command receive
PF
00
Phenomenon
Display
Lamp
Message
Message
Details
The copy inhibit
command is received
from the RIC (host). (By
PPC communication
standards.)
command is received
from the RIC (host). (By
PPC communication
standards.)
Section
Controller
Operation
mode
mode
Note
Case 1
Trouble
position/
Cause
position/
Cause
Judged by the host.
Remedy
Notification to the host
Note
Main
code
code
Sub
code
Title
FAX battery abnormality
U1
01
Phenomenon
Display
Lamp
Message
Details
FAX battery abnormality
FAX backup SRAM
battery voltage fall
FAX backup SRAM
battery voltage fall
Section
FAX
Operation
mode
mode
Note
Case 1
Trouble
position/
Cause
position/
Cause
Battery life
Remedy
Check that the battery
voltage is about 2.5V or
above.
voltage is about 2.5V or
above.
Note
Case 2
Trouble
position/
Cause
position/
Cause
Battery circuit trouble
Remedy
Check the battery circuit.
Note
Main
code
code
Sub
code
Title
RTC read error (combined use as
FAX, on MFP control PWB)
FAX, on MFP control PWB)
U1
02
Phenomenon
Display
Lamp
Message
Details
RTC read error
(combined use as FAX,
on MFP control PWB)
The read value from the
RTC on the MFP control
PWB is abnormal such as
“EE”h.
(combined use as FAX,
on MFP control PWB)
The read value from the
RTC on the MFP control
PWB is abnormal such as
“EE”h.
Section
Controller
Operation
mode
mode
Note
U1
02
Case 1
Trouble
position/
Cause
position/
Cause
RTC circuit trouble
Remedy
Make the time setup
again with the key
operation and check that
the time advances
normally.
Check the RTC circuit.
again with the key
operation and check that
the time advances
normally.
Check the RTC circuit.
Note
Case 2
Trouble
position/
Cause
position/
Cause
Battery voltage fall
Remedy
Check that the battery
voltage is about 2.5V or
above.
voltage is about 2.5V or
above.
Note
Case 3
Trouble
position/
Cause
position/
Cause
Battery circuit trouble
Remedy
Check the battery circuit.
Note
Main
code
code
Sub
code
Title
EEPROM read/write error (MFP
control)
control)
U2
00
Phenomenon
Display
Lamp
Message
Details
EEPROM write error
Section
Controller
Operation
mode
mode
Note
Case 1
Trouble
position/
Cause
position/
Cause
EEPROM trouble
Remedy
Check that the EEPROM
is properly installed.
In the simulation to
prevent against delete of
the counter data/
adjustment values, write
down the counter/
adjustment values.
is properly installed.
In the simulation to
prevent against delete of
the counter data/
adjustment values, write
down the counter/
adjustment values.
Note
Case 2
Trouble
position/
Cause
position/
Cause
Insertion of EEPROM
which is not initialized
which is not initialized
Remedy
Use SIM 16 to cancel the
U2 trouble.
U2 trouble.
Note
Case 3
Trouble
position/
Cause
position/
Cause
MFP control PWB
EEPROM access circuit
trouble
EEPROM access circuit
trouble
Remedy
Replace the MFP control
PWB.
PWB.
Note
Main
code
code
Sub
code
Title
RTC read error (combined use as
FAX, on MFP control PWB)
FAX, on MFP control PWB)
AR-M550/M620 SELF DIAG MESSAGE AND TROUBLESHOOTING 9 - 35
Main
code
code
Sub
code
Title
Counter check sum error (MFP
control)
control)
U2
11
Phenomenon
Display
Lamp
Message
Message
Details
Counter data area check
sum error
sum error
Section
Controller
Operation
mode
mode
Note
Case 1
Trouble
position/
Cause
position/
Cause
EEPROM trouble
Remedy
Check that the EEPROM
is properly installed.
In the simulation to
prevent against delete of
the counter data/
adjustment values, write
down the counter/
adjustment values.
is properly installed.
In the simulation to
prevent against delete of
the counter data/
adjustment values, write
down the counter/
adjustment values.
Note
Case 2
Trouble
position/
Cause
position/
Cause
Control circuit runaway
due to noises
due to noises
Remedy
Use SIM 16 to cancel the
U2 trouble.
U2 trouble.
Note
Case 3
Trouble
position/
Cause
position/
Cause
MFP control PWB
EEPROM access circuit
trouble
EEPROM access circuit
trouble
Remedy
Replace the MFP control
PWB.
PWB.
Note
Main
code
code
Sub
code
Title
Adjustment value check sum error
(MFP control)
(MFP control)
U2
12
Phenomenon
Display
Lamp
Message
Details
Adjustment value data
area check sum error
area check sum error
Section
Controller
Operation
mode
Note
mode
Note
Case 1
Trouble
position/
Cause
position/
Cause
EEPROM trouble
Remedy
Check that the EEPROM
is properly installed.
In the simulation to
prevent against delete of
the counter data/
adjustment values, write
down the counter/
adjustment values.
is properly installed.
In the simulation to
prevent against delete of
the counter data/
adjustment values, write
down the counter/
adjustment values.
Note
Case 2
Trouble
position/
Cause
position/
Cause
Control circuit runaway
due to noises
due to noises
Remedy
Use SIM 16 to cancel the
U2 trouble.
U2 trouble.
Note
Case 3
Trouble
position/
Cause
position/
Cause
MFP control PWB
EEPROM access circuit
trouble
EEPROM access circuit
trouble
Remedy
Replace the MFP control
PWB.
PWB.
Note
Main
code
code
Sub
code
Title
SRAM memory check sum error
(MFP control)
(MFP control)
U2
22
Phenomenon
Display
Lamp
Message
Message
Details
MFPC section SRAM
memory check sum error
SRAM check sum error
when turning on the
power.
(If this error occurs,
initialize the one-touch
dial and the FAX soft
switches.)
memory check sum error
SRAM check sum error
when turning on the
power.
(If this error occurs,
initialize the one-touch
dial and the FAX soft
switches.)
Section
Controller
Operation
mode
Note
mode
Note
Case 1
Trouble
position/
Cause
position/
Cause
SRAM trouble
Remedy
Initialize the
communication
management table
registered in the SRAM
and the FAX soft switch.
Since the registered data
are deleted, register the
data again.
communication
management table
registered in the SRAM
and the FAX soft switch.
Since the registered data
are deleted, register the
data again.
Note
Case 2
Trouble
position/
Cause
position/
Cause
Control circuit runaway
due to noises
due to noises
Remedy
Use SIM 16 to cancel the
U2 trouble.
U2 trouble.
Note
Case 3
Trouble
position/
Cause
position/
Cause
MFP control PWB
EEPROM access circuit
trouble
EEPROM access circuit
trouble
Remedy
Replace the MFP control
PWB.
PWB.
Note
AR-M550/M620 SELF DIAG MESSAGE AND TROUBLESHOOTING 9 - 36
Main
code
code
Sub
code
Title
SRAM memory individual data
check sum error
check sum error
U2
23
Phenomenon
Display
Lamp
Message
Details
Check sum error for every
individual data in SRAM
of the MFPC section
when turning on the
power
(If this error occurs,
initialize the data related
to the check sum error.
(Communication
management table,
sender’s information, etc.)
individual data in SRAM
of the MFPC section
when turning on the
power
(If this error occurs,
initialize the data related
to the check sum error.
(Communication
management table,
sender’s information, etc.)
Section
Controller
Operation
mode
Note
mode
Note
Case 1
Trouble
position/
Cause
position/
Cause
SRAM trouble
Remedy
Automatically initialize the
data related to the check
sum error by turning OFF/
ON the power.
Since the registered data
are deleted, register the
data again.
data related to the check
sum error by turning OFF/
ON the power.
Since the registered data
are deleted, register the
data again.
Note
U2
23
Case 2
Trouble
position/
Cause
position/
Cause
Control circuit runaway
due to noises
due to noises
Remedy
Use SIM 16 to cancel the
U2 trouble.
U2 trouble.
Note
Case 3
Trouble
position/
Cause
position/
Cause
MFP control PWB
EEPROM access circuit
trouble
EEPROM access circuit
trouble
Remedy
Replace the MFP control
PWB.
PWB.
Note
Main
code
code
Sub
code
Title
HDD section individual data check
sum error (MFP control)
sum error (MFP control)
U2
50
Phenomenon
Display
Lamp
Message
Details
Check sum error for
every individual data in
HDD of the MFPC section
when turning on the
power
(If this error occurs,
initialize the data related
to the check sum error.
(One-touch, group,
program, etc.)
every individual data in
HDD of the MFPC section
when turning on the
power
(If this error occurs,
initialize the data related
to the check sum error.
(One-touch, group,
program, etc.)
Section
Controller
Operation
mode
mode
Note
Case 1
Trouble
position/
Cause
position/
Cause
HDD write/read error
Remedy
Automatically initialize the
data related to the check
sum error by turning OFF/
ON the power.
Since the registered data
are deleted, register the
data again.
data related to the check
sum error by turning OFF/
ON the power.
Since the registered data
are deleted, register the
data again.
Note
Case 2
Trouble
position/
Cause
position/
Cause
Control circuit runaway
due to noises
due to noises
Remedy
Use SIM 16 to cancel the
U2 trouble.
U2 trouble.
Note
Case 3
Trouble
position/
Cause
position/
Cause
MFP control PWB HDD
access circuit trouble
access circuit trouble
Remedy
Replace the HDD.
Replace the MFP control
PWB.
Replace the MFP control
PWB.
Note
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