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MX-M700N SELF DIAG AND TROUBLE CODE 8 – 21
U2-23
SRAM memory individual data check
sum error
U2-50
HDD section individual data check
sum error (MFP control)
U2-80
EEPROM read/write error (Scanner)
U2-81
Memory check sum error (Scanner)
U2-90
EEPROM read/write error (PCU)
U2-91
Memory check sum error (PCU)
U5-30
DSPF tray lift-up trouble
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.))
Section
Controller
Case 1
Cause
SRAM trouble
Check and
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.
Case 2
Cause
Control circuit runaway due to noises
Check and
remedy
Use SIM 16 to cancel the U2 trouble.
Case 3
Cause
MFP control PWB EEPROM access circuit trouble
Check and
remedy
Replace the MFP control PWB.
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.))
Section
Controller
Case 1
Cause
HDD write/read error
Check and
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.
Case 2
Cause
Control circuit runaway due to noises
Check and
remedy
Use SIM 16 to cancel the U2 trouble.
Case 3
Cause
MFP control PWB HDD access circuit trouble
Check and
remedy
Replace the HDD.
Replace the MFP control PWB.
Details
EEPROM communication trouble (NACK
detection) Retry 3 times
Section
Scanner
Case 1
Cause
EEPROM trouble
Check and
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.
Case 2
Cause
Insertion of EEPROM which is not initialized
Check and
remedy
Use SIM 16 to cancel the U2 trouble.
Case 3
Cause
Scanner PWB EEPROM access circuit trouble
Check and
remedy
Replace the scanner PWB.
Details
When counter data sum error is detected.
Section
Scanner
Case 1
Cause
EEPROM trouble
Check and
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.
Case 2
Cause
Control circuit runaway due to noises
Check and
remedy
Use SIM 16 to cancel the U2 trouble.
Case 3
Cause
Scanner PWB EEPROM access circuit trouble
Check and
remedy
Replace the scanner PWB.
Details
EEPROM communication trouble
(NACK detection)
Retry 3 times
Section
Engine
Case 1
Cause
EEPROM trouble
Check and
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.
Case 2
Cause
Insertion of EEPROM which is not initialized
Check and
remedy
Use SIM 16 to cancel the U2 trouble.
Case 3
Cause
PCU PWB EEPROM access circuit trouble
Check and
remedy
Replace the PCU PWB.
Details
When POF data/counter data sum error is
detected.
Section
Engine
Case 1
Cause
EEPROM trouble
Check and
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.
Case 2
Cause
Control circuit runaway due to noises
Check and
remedy
Use SIM 16 to cancel the U2 trouble.
Case 3
Cause
PCU PWB EEPROM access circuit trouble
Check and
remedy
Replace the PCU PWB.
Details
Lift-up trouble is detected 5 times continuously.
Section
Scanner
Case 1
Cause
STUD/STLD trouble.
STUD does not turn on within the specified time.
STLD does not turn off within the specified time.
Check and
remedy
Check the harness and the connector of the STUD
and STLD.
Lift-up trouble unit check