MX3500N SELF DIAG AND TROUBLE CODE 8 – 27
U2-90 EEPROM read/write error
(PCU detection)
U2-91 EEPROM (PCU) check sum error
U5-00 SPF communication trouble
U5-16 SPF fan motor trouble
U5-30 SPF lift-up trouble
U5-31 SPF tray lift-down trouble
U5-40 SPF install trouble
U6-00 Desk communication trouble
U6-01 Tray 1 lift-up trouble
U6-02 Tray 2 lift-up trouble
Trouble content EEPROM version error, write error to EEPROM
Section PCU
Case 1 Cause EEPROM trouble, installation of EEPROM which
is not initialized
Check and
remedy
Check that EEPROM is properly set.
Case 2 Cause PCU PWB EEPROM access circuit trouble
Check and
remedy
To avoid deletion of the counter data/adjustment
data, 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 Check sum error of adjustment value (PCU)
Section PCU
Case 1 Cause Control circuit hang-up due to electrical noises
Check and
remedy
Use SIM16 to cancel the trouble.
Case 2 Cause EEPROM trouble.
Check and
remedy
Check that EEPROM is properly set.
Case 3 Cause PCU PWB EEPROM access circuit trouble
Check and
remedy
To avoid deletion of the counter data/adjustment
data, 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.
Trouble content Communication error between the SCU and the
DSPF, communication line test error after turning
on the power or canceling the exclusive simulation
(MX-3501N/3501FN/4501N/4501FN)
Section Scanner
Case 1 Cause Malfunction due to electrical noises
Check and
remedy
Cancel the trouble by turning OFF/ON.
Case 2 Cause Connector and harness connection trouble or
disconnection
Check and
remedy
Check the connector and the harness of the
communication line.
Case 3 Cause Control (SCU) PWB trouble. DSPF PWB trouble
Check and
remedy
Replace the control (SCU) PWB. Replace the
DSPF PWB.
Trouble content The motor lock signal is detected during rotation of
the fan.
Section Scanner
Case 1 Cause Fan motor trouble,harness of the fan motor related,
circuit trouble
Check and
remedy
Use SIM2-3 to check the operation.
Check harness, connector and fan motor related
circuit.
Trouble content Lift-up trouble is detected 5 times continuously.
(MX-3501N/4501N)
Section Scanner
Case 1 Cause STUD/STLD trouble
Check and
remedy
Check STUD/STLD and its harness and connector.
Check the lift-up unit.
Trouble content Lift-down trouble (STLD does not turn OFF within
the specified time.) (MX-3501N/4501N)
Section Scanner
Case 1 Cause STUD/STLD trouble
Check and
remedy
Check STUD/STLD and its harness and connector.
Check the lift-up unit.
Trouble content Detected the installed (individual installed signal )
of RSPF/DSPF both.
Section Scanner
Case 1 Cause Circuit trouble of the installed detection signal
Check and
remedy
Check installed detection circuit and harness,
connector.
Trouble content Desk communication error, communication line
test error after turning on the power or canceling
the exclusive simulation
Section PCU
Case 1 Cause Connector and harness connection trouble or
disconnection, desk control PWB trouble, control
PWB (PCU) trouble, malfunction due to electrical
noises
Check and
remedy
Cancel the trouble by turning OFF/ON. Check the
connector and the harness of the communication
line.
Trouble content DLUD1 does not turn ON within the specified time.
Section PCU
Case 1 Cause DLUD1 sensor trouble, tray 1 lift-up motor trouble,
desk PWB, lift-up unit, paper feed unit harness
connection trouble
Check and
remedy
Check DLUD1 and its harness and connector.
Check the lift-up unit.
Trouble content DLUD2 does not turn ON within the specified time.
Section PCU
Case 1 Cause DLUD2 sensor trouble, tray 2 lift-up motor trouble,
desk PWB, lift-up unit, paper feed unit harness
connection trouble
Check and
remedy
Check DLUD2 and its harness and connector.
Check the lift-up unit.
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