Read Sharp MX-5500N / MX-6200N / MX-7000N (serv.man47) Service Manual online
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.
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