Sharp MX-5500N / MX-6200N / MX-7000N (serv.man47) Service Manual ▷ View online
MX-7000N SELF DIAG AND TROUBLE CODE 8 – 29
L4-42
Ozone fan 3 lock
L4-43
Paper exit cooling fan center lock
L4-44
Power cooling fan 2 lock
L6-10
Polygon motor lock detection
L8-01
No full wave signal
L8-02
Full wave signal width abnormality
L8-20
Power controller communication
trouble
trouble
PC---
Personal counter not installed
U1-01
Battery trouble
U2-00
EEPROM read/write error
(MFP detection)
(MFP detection)
Trouble content
When the ozone fan 3 is operated, the fan
operation signal is not detected within the specified
time.
operation signal is not detected within the specified
time.
Section
PCU
Case 1
Cause
Fan connector disconnection
Check and
remedy
remedy
Check the harness and the connector between the
PCU PWB and the fan.
PCU PWB and the fan.
Case 2
Cause
Fan does not rotate because of other trouble.
Check and
remedy
remedy
Use SIM6-2 to check that the fan is actually
rotating.
rotating.
Trouble content
When the paper exit cooling fan center is operated,
the fan operation signal is not detected within the
specified time.
the fan operation signal is not detected within the
specified time.
Section
PCU
Case 1
Cause
Fan connector disconnection
Check and
remedy
remedy
Check the harness and the connector between the
PCU PWB and the fan.
PCU PWB and the fan.
Case 2
Cause
Fan does not rotate because of other trouble.
Check and
remedy
remedy
Use SIM6-2 to check that the fan is actually
rotating.
rotating.
Trouble content
When the power cooling fan 2 is operated, the fan
operation signal is not detected within the specified
time.
operation signal is not detected within the specified
time.
Section
PCU
Case 1
Cause
Fan connector disconnection
Check and
remedy
remedy
Check the harness and the connector between the
PCU PWB and the fan.
PCU PWB and the fan.
Case 2
Cause
Fan does not rotate because of other trouble.
Check and
remedy
remedy
Use SIM6-2 to check that the fan is actually
rotating.
rotating.
Trouble content
It is judged that the LSU polygon motor lock signal
is not outputted, and the lock signal is checked
after 15 sec from starting rotation of the polygon
motor and it is judged that the polygon motor does
not rotate properly.
is not outputted, and the lock signal is checked
after 15 sec from starting rotation of the polygon
motor and it is judged that the polygon motor does
not rotate properly.
Section
PCU
Case 1
Cause
Disconnection of the LSU connector or the LSU
inside harness, or breakage
inside harness, or breakage
Check and
remedy
remedy
Check connection of the harness and the
connector.
connector.
Case 2
Cause
Polygon motor trouble, LSU PWB trouble
Check and
remedy
remedy
Use SIM61-1 to check the operation of the polygon
motor.
Replace the LSUcnt PWB. Replace the LSU.
motor.
Replace the LSUcnt PWB. Replace the LSU.
Trouble content
No full wave signal is detected.
Section
PCU
Case 1
Cause
Harness trouble
Check and
remedy
remedy
Check connection of the harness and the
connector.
connector.
Case 2
Cause
Power unit trouble
Check and
remedy
remedy
Replace the power unit.
Case 3
Cause
PCU PWB trouble
Check and
remedy
remedy
Replace the PCU PWB.
Trouble content
The full wave signal is judged as frequency
abnormality. (The detection frequency is judged as
65Hz or above or 45Hz or less.)
abnormality. (The detection frequency is judged as
65Hz or above or 45Hz or less.)
Section
PCU
Case 1
Cause
Harness trouble
Check and
remedy
remedy
Check the harness and the connector connection.
Case 2
Cause
Power unit trouble
Check and
remedy
remedy
Replace the power unit.
Case 3
Cause
PCU PWB trouble
Check and
remedy
remedy
Replace the PCU PWB.
Trouble content
Communication establishment error/Framing/
Parity/Protocol error
Parity/Protocol error
Section
MFP
Case 1
Cause
Connector connection trouble between the mother
board PWB and the MFPcnt PWB.
MFPcnt PWB mother board connector pin
breakage
board PWB and the MFPcnt PWB.
MFPcnt PWB mother board connector pin
breakage
Check and
remedy
remedy
Check the connector connection between the
mother board PWB and the MFPcnt PWB. Check
grounding of the machine.
mother board PWB and the MFPcnt PWB. Check
grounding of the machine.
Case 2
Cause
Mother PWB trouble
Check and
remedy
remedy
Replace the mother PWB.
Case 3
Cause
Mother PWB jumper error
Check and
remedy
remedy
Set the mother PWB jumper to the Default side.
Trouble content
The personal counter is not installed.
Section
MFP
Case 1
Cause
The personal counter is not installed.
Check and
remedy
remedy
Install the personal counter.
Trouble content
Backup SRAM battery voltage fall
Section
MFP
Case 1
Cause
1)
Battery life
2)
Battery circuit abnormality
Check and
remedy
remedy
Check that the battery voltage is about 2.5V or
above.
above.
Trouble content
EEPROM device read/write error
Section
MFP
Case 1
Cause
EEPROM device trouble
Check and
remedy
remedy
Replace the EEPROM device.
Case 2
Cause
EEPROM device contact failure
Check and
remedy
remedy
Check that EEPROM device is properly inserted.
Case 3
Cause
Device access error due to electrical noises
Check and
remedy
remedy
Replace the MFPcnt PWB.
MX-7000N SELF DIAG AND TROUBLE CODE 8 – 30
U2-05
HDD/SRAM/EEPROM data
discrepancy
discrepancy
U2-10
SRAM user authentication index
check sum error
check sum error
U2-11
EEPROM check sum error
(MFP detection)
(MFP detection)
U2-22
SRAM memory check sum error
U2-23
MFPC section SRAM memory
individual data check sum error
individual data check sum error
U2-24
SRAM memory user authentication
counter check sum error
counter check sum error
U2-25
Flash memory user authentication
counter check sum error
counter check sum error
U2-30
Serial number data discrepancy
(MFP
(MFP
↔ PCU)
Trouble content
A HDD or SRAM memory for user authentication
different from that used before turn off the power is
installed.
different from that used before turn off the power is
installed.
Section
MFP
Case 1
Cause
HDD replacement or SRAM memory replacement
Check and
remedy
remedy
Initialize the authentication information with SIM16,
and import the backup data (exported data by
device cloning) if any.
and import the backup data (exported data by
device cloning) if any.
Trouble content
User index information (basic data of user
authentication) check sum error on the SRAM
authentication) check sum error on the SRAM
Section
MFP
Case 1
Cause
1)
SRAM trouble
2)
Hang-up of the control circuit due to electrical
noises
noises
3)
MFPcnt PWB SRAM access circuit trouble
Check and
remedy
remedy
Use SIM16 to cancel U2 trouble.
Trouble content
Counter information check sum error on the
EEPROM
EEPROM
Section
MFP
Case 1
Cause
1)
EEPROM device trouble
2)
EEPROM device contact failure
3)
Device access error due to electrical noises
Check and
remedy
remedy
Use SIM16 to cancel U2 trouble.
Trouble content
MFPcnt PWB SRAM memory check sum error
Section
MFP
Case 1
Cause
SRAM trouble
Check and
remedy
remedy
1)
Initialize the communication management
table registered in SRAM and the FAX soft
switch.
table registered in SRAM and the FAX soft
switch.
2)
Since the registered contents have been
deleted, register them again.
deleted, register them again.
Case 2
Cause
Control circuit hang-up due to electrical noises
Check and
remedy
remedy
Use SIM16 to cancel U2 trouble.
Case 3
Cause
MFPcnt PWB SRAM access circuit trouble
Check and
remedy
remedy
Replace the MFPcnt PWB.
Trouble content
MFPcnt PWB SRAM memory individual data
check sum error (Communication management
table, sender registration data, etc.)
check sum error (Communication management
table, sender registration data, etc.)
Section
MFP
Case 1
Cause
SRAM trouble
Check and
remedy
remedy
1)
Turn OFF/ON the power to initialize the data
related to the check sum error contents
automatically.
related to the check sum error contents
automatically.
2)
Since the registered contents have been
deleted, register them again.
deleted, register them again.
Case 2
Cause
Control circuit hang-up due to electrical noises
Check and
remedy
remedy
Use SIM16 to cancel U2 trouble.
Case 3
Cause
MFPcnt PWB SRAM access circuit trouble
Check and
remedy
remedy
Replace the MFPcnt PWB.
Trouble content
Check sum error of the user counter on SRAM
Section
MFP
Case 1
Cause
1)
SRAM trouble
2)
Control circuit hang-up due to electrical
noises
noises
3)
MFPcnt PWB SRAM access circuit trouble
Check and
remedy
remedy
Use SIM16 to cancel U2 trouble.
Trouble content
Check sum error of the user authentication counter
on FLASH
on FLASH
Section
MFP
Case 1
Cause
Flash trouble. Control circuit hang-up due to
electrical noises
MFPcnt PWB FLASH access circuit trouble.
electrical noises
MFPcnt PWB FLASH access circuit trouble.
Check and
remedy
remedy
Use SIM16 to recalculate the check sum of the
user counter and save the normal sum value.
user counter and save the normal sum value.
Trouble content
The serial number stored in the PCU differs from
that stored in the MFP.
that stored in the MFP.
Section
MFP
Case 1
Cause
EEPROM is not changed when the PCU/MFPcnt
PWB is replaced.
PWB is replaced.
Check and
remedy
remedy
1)
Check that EEPROM is properly set.
2)
Check that EEPROM on the previous PWB is
inserted to the newly installed PWB.
inserted to the newly installed PWB.
MX-7000N SELF DIAG AND TROUBLE CODE 8 – 31
U2-50
HDD section individual data check
sum error (MFP)
sum error (MFP)
U2-80
EEPROM read/write error
(SCU detection)
(SCU detection)
U2-81
Adjustment value check sum error
(SCU detection)
(SCU detection)
U2-90
EEPROM read/write error
(PCU detection)
(PCU detection)
U2-91
Adjustment value check sum error
(PCU detection)
(PCU detection)
U5-00
SPF communication trouble
U5-16
SPF fan motor trouble
Trouble content
MFPcnt HDD individual data check sum error
(One-touch, group, program, etc.)
(One-touch, group, program, etc.)
Section
MFP
Case 1
Cause
Write/read error to/from HDD
Check and
remedy
remedy
1)
Turn OFF/ON the power to initialize the data
related to the check sum error contents
automatically.
related to the check sum error contents
automatically.
2)
Since the registered contents have been
deleted, register them again.
deleted, register them again.
3)
If the trouble is not canceled, replace the
HDD.
HDD.
Case 2
Cause
Control circuit hang-up due to electrical noises
Check and
remedy
remedy
Use SIM16 to cancel U2 trouble.
Case 3
Cause
MFPcnt PWB HDD access circuit trouble
Check and
remedy
remedy
Replace the MFPcnt PWB.
Trouble content
1)
EEPROM version error
2)
Write error to EEPROM
Section
SCU
Case 1
Cause
EEPROM trouble, installation of EEPROM which is
not initialized
not initialized
Check and
remedy
remedy
Check that EEPROM is properly set.
Case 2
Cause
SCU PWB EEPROM access circuit trouble
Check and
remedy
remedy
To avoid deletion of the counter data/adjustment
values, use the simulation to save the counter/
adjustment values. (If there is a printer option,
execute SIM22-1 to save the counter data and the
adjustment values.) Replace the SCU PWB. Use
SIM16 to cancel the trouble.
values, use the simulation to save the counter/
adjustment values. (If there is a printer option,
execute SIM22-1 to save the counter data and the
adjustment values.) Replace the SCU PWB. Use
SIM16 to cancel the trouble.
Trouble content
EEPROM (SCU) check sum error
Section
SCU
Case 1
Cause
Control circuit hang-up due to electrical noises
Check and
remedy
remedy
Use SIM16 to cancel U2 trouble.
Case 2
Cause
EEPROM trouble
Check and
remedy
remedy
To avoid deletion of the counter data/adjustment
values, use the simulation to save the counter/
adjustment values. (If there is a printer option,
execute SIM22-1 to save the counter data and the
adjustment values.) Replace the SCU PWB. Use
SIM16 to cancel the trouble.
values, use the simulation to save the counter/
adjustment values. (If there is a printer option,
execute SIM22-1 to save the counter data and the
adjustment values.) Replace the SCU PWB. Use
SIM16 to cancel the trouble.
Case 3
Cause
SCU PWB EEPROM access circuit trouble
Check and
remedy
remedy
Check that EEPROM is properly set.
Trouble content
EEPROM version error, write error to EEPROM
Section
PCU
Case 1
Cause
EEPROM trouble, installation of EEPROM which
is not initialized.
Installation of 64KBit EEPROM
is not initialized.
Installation of 64KBit EEPROM
Check and
remedy
remedy
Check that EEPROM is properly set.
Check to insure that 256KBit EEPROM is installed.
Check to insure that 256KBit EEPROM is installed.
Case 2
Cause
PCU PWB EEPROM access circuit trouble
Check and
remedy
remedy
To avoid deletion of the counter data/adjustment
values, use the simulation to save the counter/
adjustment values. (If there is a printer option,
execute SIM22-1 to save the counter data and the
adjustment values.) Replace the PCU PWB. Use
SIM16 to cancel the trouble.
values, use the simulation to save the counter/
adjustment values. (If there is a printer option,
execute SIM22-1 to save the counter data and the
adjustment values.) Replace the PCU PWB. Use
SIM16 to cancel the trouble.
Trouble content
EEPROM (PCU) check sum error
Section
PCU
Case 1
Cause
Control circuit hang-up due to electrical noises
Check and
remedy
remedy
Use SIM16 to cancel the trouble.
Case 2
Cause
EEPROM trouble.
Check and
remedy
remedy
Check that EEPROM is properly set.
Use SIM16 to cancel the trouble.
Use SIM16 to cancel the trouble.
Case 3
Cause
PCU PWB EEPROM access circuit trouble
Check and
remedy
remedy
To avoid deletion of the counter data/adjustment
values, use the simulation to save the counter/
adjustment values. (If there is a printer option,
execute SIM22-1 to save the counter data and the
adjustment values.) Replace the PCU PWB.
Use SIM16 to cancel the trouble.
values, use the simulation to save the counter/
adjustment values. (If there is a printer option,
execute SIM22-1 to save the counter data and the
adjustment values.) Replace the PCU PWB.
Use SIM16 to cancel the trouble.
Trouble content
Communication error between the SCU and the
DSPF, communication line test error after turning
on the power or canceling the exclusive simulation
DSPF, communication line test error after turning
on the power or canceling the exclusive simulation
Section
SCU
Case 1
Cause
Malfunction due to electrical noises
Check and
remedy
remedy
Cancel the trouble by turning OFF/ON.
Case 2
Cause
Connector and harness connection trouble or
disconnection
disconnection
Check and
remedy
remedy
Check the connector and the harness of the
communication line.
communication line.
Case 3
Cause
Control (SCU) PWB trouble. DSPF PWB trouble
Check and
remedy
remedy
Replace the control (SCU) PWB. Replace the
DSPF PWB.
DSPF PWB.
Trouble content
The motor lock signal is detected during rotation of
the fan.
the fan.
Section
SCU
Case 1
Cause
Fan motor trouble, harness of the fan motor
related, circuit trouble
related, circuit trouble
Check and
remedy
remedy
Use SIM2-3 to check the operation.
Check harness, connector and fan motor related
circuit.
Check harness, connector and fan motor related
circuit.
MX-7000N SELF DIAG AND TROUBLE CODE 8 – 32
U5-30
SPF tray lift-up trouble
U5-31
SPF tray lift-down trouble
U6-09
LCC lift motor trouble
U6-20
LCC communication trouble
U6-21
LCC transport motor trouble
U6-22
LCC 24V power abnormality
U6-23
LCC tray descending trouble
(reverse winding detection)
(reverse winding detection)
U6-24
LCC tray lock detection trouble
U6-51
LCC incompatibility trouble
UC-02
CPT-ASIC trouble
Trouble content
Lift-up trouble is detected 5 times continuously.
(STUD does not turn ON within the specified time.)
(STUD does not turn ON within the specified time.)
Section
SCU
Case 1
Cause
STUD/STLD trouble
Check and
remedy
remedy
Check STUD/STLD and its harness and connector.
Check the lift-up unit.
Check the lift-up unit.
Trouble content
Lift-down trouble (STLD does not turn OFF within
the specified time.)
the specified time.)
Section
SCU
Case 1
Cause
STUD/STLD trouble
Check and
remedy
remedy
Check STUD/STLD and its harness and connector.
Check the lift-up unit.
Check the lift-up unit.
Trouble content
• The encoder input value is not changed in
0.2sec (1st time)/0.5sec (2nd time and later)
after rotation of the motor.
after rotation of the motor.
• The motor is rotated for 24sec (LCX2)/48sec
(LCX3) or more.
Section
PCU
Case 1
Cause
Sensor trouble, LCC control PWB trouble, gear
breakage, lift motor trouble
breakage, lift motor trouble
Check and
remedy
remedy
Use SIM4-2 and 4-3 to check the operation of the
sensor and the lift motor. Use SIM15 to cancel the
trouble.
sensor and the lift motor. Use SIM15 to cancel the
trouble.
Trouble content
LCC communication error. Communication line test
error after turning ON the power or canceling the
exclusive simulation. LCC and machine model
codes discrepancy error
error after turning ON the power or canceling the
exclusive simulation. LCC and machine model
codes discrepancy error
Section
PCU
Case 1
Cause
Connector and harness connection trouble or
disconnection, LCC control PWB trouble, control
(PCU) PWB trouble, malfunction due to electrical
noises
disconnection, LCC control PWB trouble, control
(PCU) PWB trouble, malfunction due to electrical
noises
Check and
remedy
remedy
Turn OFF/ON the power to cancel the trouble.
Check the connector and the harness of the
communication line.
Check the connector and the harness of the
communication line.
Trouble content
After passing 1 sec from turning ON the motor, the
lock state of the motor lock signal is detected
continuously for 1 sec.
lock state of the motor lock signal is detected
continuously for 1 sec.
Section
PCU
Case 1
Cause
Motor lock, motor RPM abnormality, an
overcurrent to the motor, LCC control PWB trouble
overcurrent to the motor, LCC control PWB trouble
Check and
remedy
remedy
Use SIM4-3 to check the operation of the transport
motor.
motor.
Trouble content
DC24V power is not supplied to LCC.
Section
PCU
Case 1
Cause
Connector and harness connection trouble or
disconnection, LCC control PWB trouble, power
unit trouble
disconnection, LCC control PWB trouble, power
unit trouble
Check and
remedy
remedy
Check the connector and the harness of the power
line. Check that the power unit and the LCC control
PWB is of 24V.
line. Check that the power unit and the LCC control
PWB is of 24V.
Trouble content
Reverse winding of the LCC tray wire is detected.
Section
PCU
Case 1
Cause
Reverse winding of the wire
Check and
remedy
remedy
Check the wire.
Case 2
Cause
Connector and harness connection trouble
Check and
remedy
remedy
Check connection of the connector and the
harness.
harness.
Case 3
Cause
Reverse winding detection SW-ON, reverse
winding detection SW trouble, LCC control PWB
trouble
winding detection SW trouble, LCC control PWB
trouble
Check and
remedy
remedy
Replace the reverse winding SW and the LCC
control PWB.
control PWB.
Trouble content
Malfunction of the LCC tray lock mechanism is
detected.
detected.
Section
PCU
Case 1
Cause
Tray lock mechanism trouble
Check and
remedy
remedy
Check the tray lock mechanism.
Case 2
Cause
Connector and harness connection trouble
Check and
remedy
remedy
Check connection of the connector and the
harness.
harness.
Case 3
Cause
Tray lock detection sensor trouble, LCC control
PWB trouble
PWB trouble
Check and
remedy
remedy
Replace the tray lock detection sensor and the
LCC control PWB.
LCC control PWB.
Trouble content
Detection of LCC connection which is incompatible
with the MX-5500N/6200N/7000N series.
with the MX-5500N/6200N/7000N series.
Section
PCU
Case 1
Cause
Connection of the LCC, which is incompatible with
the MX-5500N/6200N/7000N series is detected.
the MX-5500N/6200N/7000N series is detected.
Check and
remedy
remedy
Connect the MX-LCX2/MX-LCX3.
Trouble content
CPT-ASIC access error (When the ASIC does not
operate normally.)
operate normally.)
Section
SCU
Case 1
Cause
1)
CPT-ASIC abnormality
2)
SCU PWB abnormality
Check and
remedy
remedy
Turn OFF/ON the power several times. If the
trouble still occurs, replace the SCU PWB or the
CPT-ASIC.
trouble still occurs, replace the SCU PWB or the
CPT-ASIC.
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