Sharp AR-M550 (serv.man16) Service Manual ▷ View online
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
AR-M550/M620 SELF DIAG MESSAGE AND TROUBLESHOOTING 9 - 37
Main
code
code
Sub
code
Title
EEPROM red/write error (Scanner)
U2
80
Phenomenon
Display
Lamp
Message
Message
Details
EEPROM red/write error
(Scanner)
EEPROM communication
trouble (NACK detection)
Retry 3 times
(Scanner)
EEPROM communication
trouble (NACK detection)
Retry 3 times
Section
Scanner
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
Scanner PWB EEPROM
access circuit trouble
access circuit trouble
Remedy
Replace the scanner
PWB.
PWB.
Note
Main
code
code
Sub
code
Title
Memory check sum error (Scanner)
U2
81
Phenomenon
Display
Lamp
Message
Message
Details
Memory check sum error
(Scanner)
When counter data sum
error is detected.
(Scanner)
When counter data sum
error is detected.
Section
Scanner
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
U2
81
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
Scanner PWB EEPROM
access circuit trouble
access circuit trouble
Remedy
Replace the scanner
PWB.
PWB.
Note
Main
code
code
Sub
code
Title
EEPROM read/write error (PCU)
U2
90
Phenomenon
Display
Lamp
Message
Details
EEPROM read/write error
(PCU)
EEPROM communication
trouble (NACK detection)
Retry 3 times
(PCU)
EEPROM communication
trouble (NACK detection)
Retry 3 times
Section
Engine
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
PCU PWB EEPROM
access circuit trouble
access circuit trouble
Remedy
Replace the PCU PWB.
Note
Main
code
code
Sub
code
Title
Memory check sum error (Scanner)
AR-M550/M620 SELF DIAG MESSAGE AND TROUBLESHOOTING 9 - 38
Main
code
code
Sub
code
Title
Memory check sum error (PCU)
U2
91
Phenomenon
Display
Lamp
Message
Message
Details
Memory check sum error
(PCU)
When POF data/counter
data sum error is
detected.
(PCU)
When POF data/counter
data sum error is
detected.
Section
Engine
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
PCU PWB EEPROM
access circuit trouble
access circuit trouble
Remedy
Replace the PCU PWB.
Note
Main
code
code
Sub
code
Title
SPF tray lift-up trouble
U5
30
Phenomenon
Display
Lamp
Message
Details
SPF tray lift-up trouble
Lift-up trouble is detected
5 times continuously.
Lift-up trouble is detected
5 times continuously.
Section
Scanner
Operation
mode
mode
Note
Case 1
Trouble
position/
Cause
position/
Cause
STUD/STLD trouble
STUD does not turn on
within the specified time.
STLD does not turn off
within the specified time.
STUD does not turn on
within the specified time.
STLD does not turn off
within the specified time.
Remedy
Check the harness and
the connector of the
STUD and STLD.
Lift-up trouble unit check
the connector of the
STUD and STLD.
Lift-up trouble unit check
Note
Main
code
code
Sub
code
Title
SPF tray lift-down trouble
U5
31
Phenomenon
Display
Lamp
Message
Details
SPF tray lift-down trouble
STLD does not turn off
within the specified time.
STLD does not turn off
within the specified time.
Section
Scanner
Operation
mode
mode
Note
Case 1
Trouble
position/
Cause
position/
Cause
STUD/STLD trouble
STUD does not turn on
within the specified time.
STLD does not turn off
within the specified time.
STUD does not turn on
within the specified time.
STLD does not turn off
within the specified time.
Remedy
Check the harness and
the connector of the
STUD and STLD.
Lift-up trouble unit check
the connector of the
STUD and STLD.
Lift-up trouble unit check
Note
Main
code
code
Sub
code
Title
LCC lift motor trouble
U6
09
Phenomenon
Display
Lamp
Message
Details
LCC lift motor trouble
• The upper limit sensor
• The upper limit sensor
does not turn on within
24 sec after the lift
motor is on.
24 sec after the lift
motor is on.
• No rotation sensor
signal is detected for
0.2 sec or longer while
the lift motor is on.
0.2 sec or longer while
the lift motor is on.
• The upper limit switch
is on while the lift motor
is on.
is on.
When the trouble occurs
3 time continuously that
the upper limit sensor
does not turn on.
3 time continuously that
the upper limit sensor
does not turn on.
Section
LCC
Operation
mode
mode
Note
Case 1
Trouble
position/
Cause
position/
Cause
Sensor trouble
LCC control PWB trouble
Gear breakage
Lift motor trouble
LCC control PWB trouble
Gear breakage
Lift motor trouble
Remedy
Use SIM to check the
sensor detection.
Use SIM to check the lift
motor operation.
Use SIM 15 to cancel the
trouble.
sensor detection.
Use SIM to check the lift
motor operation.
Use SIM 15 to cancel the
trouble.
Note
AR-M550/M620 SELF DIAG MESSAGE AND TROUBLESHOOTING 9 - 39
Main
code
code
Sub
code
Title
LCC communication trouble
U6
20
Phenomenon
Display
Lamp
Message
Message
Details
Communication trouble
with the LCC.
Follows the
communication protocol
specifications.
Communication error,
timing abnormality of the
communication data and
the communication signal
line
with the LCC.
Follows the
communication protocol
specifications.
Communication error,
timing abnormality of the
communication data and
the communication signal
line
Section
LCC
Operation
mode
mode
Note
Case 1
Trouble
position/
Cause
position/
Cause
Improper connection or
disconnection of the
connector and the
harness
Desk control PWB trouble
Control PWB (PCU)
trouble
Malfunction caused by
noises
disconnection of the
connector and the
harness
Desk control PWB trouble
Control PWB (PCU)
trouble
Malfunction caused by
noises
Remedy
Canceled by turning ON/
OFF the power.
Check the connector and
the harness in the
communication line.
OFF the power.
Check the connector and
the harness in the
communication line.
Note
Main
code
code
Sub
code
Title
LCC transport motor trouble
U6
21
Phenomenon
Display
Lamp
Message
Details
LCC transport motor
trouble
The lock detection signal
is detected continuously
for 1sec after delay of
1sec from start of the
motor.
trouble
The lock detection signal
is detected continuously
for 1sec after delay of
1sec from start of the
motor.
Section
LCC
Operation
mode
mode
Note
Case 1
Trouble
position/
Cause
position/
Cause
Motor lock
Motor RPM abnormality
Overcurrent to the motor
Desk control PWB trouble
Motor RPM abnormality
Overcurrent to the motor
Desk control PWB trouble
Remedy
Use SIM 4-3 to check the
transport motor
operation.
transport motor
operation.
Note
Main
code
code
Sub
code
Title
LCC 24V power abnormality
addition
addition
U6
22
Phenomenon
Display
Lamp
Message
Message
Details
LCC 24V power
abnormality addition
24V power is not supplied
to the LCC. (the LCC 24V
power is not detected for
1 sec or longer after 1 sec
from power on)
abnormality addition
24V power is not supplied
to the LCC. (the LCC 24V
power is not detected for
1 sec or longer after 1 sec
from power on)
Section
LCC
Operation
mode
Note
mode
Note
Case 1
Trouble
position/
Cause
position/
Cause
Improper connection or
disconnection of the
connector and the
harness
disconnection of the
connector and the
harness
Remedy
Check the connector and
the harness of the power
line.
the harness of the power
line.
Note
Case 2
Trouble
position/
Cause
position/
Cause
LCC control PWB trouble
Power unit trouble
Power unit trouble
Remedy
Check the 24V power
with the power unit and
the LCC control PWB.
with the power unit and
the LCC control PWB.
Note
Main
code
code
Sub
code
Title
RIC communication trouble
U7
00
Phenomenon
Display
Lamp
Message
Details
Communication error with
RIC (By PPC
communication
standards)
An error in the
communication line test
after turning on the power
or canceling the
simulation
RIC (By PPC
communication
standards)
An error in the
communication line test
after turning on the power
or canceling the
simulation
Section
Controller
Operation
mode
Note
mode
Note
Case 1
Trouble
position/
Cause
position/
Cause
Improper connection or
disconnection of the
connector and the
harness
RIC control PWB trouble
Control PWB (MFP
control) trouble
Malfunction caused by
noises
disconnection of the
connector and the
harness
RIC control PWB trouble
Control PWB (MFP
control) trouble
Malfunction caused by
noises
Remedy
Canceled by turning ON/
OFF the power.
Check the connector and
the harness in the
communication line.
OFF the power.
Check the connector and
the harness in the
communication line.
Note
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