MX-2300/2700 N/G SELF DIAG AND TROUBLE CODE 8 – 24
L4-32 Power cooling fan/ozone exhaust fan
trouble
L6-10 Polygon motor lock detection
L8-01 No full wave signal
L8-02 Full wave signal width abnormality
L8-20 Power controller communication trou-
ble
PC--- Personal counter not installed
U1-01 Battery trouble
U2-00 EEPROM read/write error
(MFP detection)
U2-05 HDD/Flash/EEPROM data discrepancy
Trouble content When the power cooling fan/ozone exhaust fan is
operated, the fan operation signal is not detected
within the specified time.
Section PCU
Case 1 Cause Power cooling fan or ozone exhaust fan connector
disconnection
Check
and
remedy
Check the harness and the connector between the
PCU PWB and the fan.
Case 2 Cause Fan does not rotate because of other trouble
Check
and
remedy
Use SIM6-2 to check that the fan is actually rotating.
Trouble content It is judged that the LSU polygon motor lock signal is
not outputted, and the lock signal is checked after 7
sec from starting rotation of the polygon motor and it is
judged that the polygon motor does not rotate
properly.
Section LSU
Case 1 Cause Disconnection of the LSU connector or the LSU inside
harness, or breakage
Check
and
remedy
Check connection of the harness and the connector.
If the trouble cannot be removed, replace the LSUcnt
PWB or the LSU.
Case 2 Cause Polygon motor trouble, LSU PWB trouble
Check
and
remedy
Use SIM61-1 to check the operation of the polygon
motor.
If the trouble cannot be removed, replace the LSUcnt
PWB or the LSU.
Trouble content No full wave signal is detected.
Section PCU
Case 1 Cause Harness trouble
Check
and
remedy
Check connection of the harness and the connector.
Case 2 Cause Power unit trouble
Check
and
remedy
Replace the power unit.
Case 3 Cause PCU PWB trouble
Check
and
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.)
Section PCU
Case 1 Cause Harness trouble
Check
and
remedy
Check the harness and the connector connection.
Case 2 Cause Power unit trouble
Check
and
remedy
Replace the power unit.
Case 3 Cause PCU PWB trouble
Check
and
remedy
Replace the PCU PWB.
Trouble content Communication establishment error/Framing/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
Check
and
remedy
Check the connector connection between the mother
board PWB and the MFPcnt PWB. Check grounding
of the machine.
Case 2 Cause Mother PWB trouble
Check
and
remedy
Replace the mother PWB.
Case 3 Cause Mother PWB jumper error
Check
and
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
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
Check that the battery voltage is about 2.5V or above.
Trouble content EEPROM device read/write error
Section MFP
Case 1 Cause EEPROM device trouble
Check
and
remedy
Replace the EEPROM device.
Case 2 Cause EEPROM device contact failure
Check
and
remedy
Check that EEPROM device is properly inserted.
Case 3 Cause Device access error due to electrical noises
Check
and
remedy
Replace the MFPcnt PWB.
Trouble content A HDD or Flash memory for user authentication
different from that used before turn off the power is
installed.
Section MFP
Case 1 Cause HDD replacement or Flash memory replacement
Check
and
remedy
Initialize the authentication information with SIM16,
and import the backup data (exported data) if any.
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