MX-M700N SELF DIAG AND TROUBLE CODE 8 – 9
E7-56 Incompatibility check (62ppm)
(Engine (PCU) detection)
E7-57 Incompatibility check (70ppm)
(Engine (PCU) detection)
E7-60 Controller connection trouble
E7-65 Incompatibility check (55ppm)
(MFP controller detection)
E7-66 Incompatibility check (62ppm)
(MFP controller detection)
E7-67 Incompatibility check (70ppm)
(MFP controller detection)
E7-80 Communication trouble between the
MFP control and the scanner
(MFP control detection)
E7-90 MFP control-PCU communication
trouble (MFP control detection)
EE-EL Auto developer adjustment trouble
(Overtoner error)
Details An error is detected in the internal incompatibility
check in the engine (PCU).
Section Engine (PCU)
Case 1 Cause PCU PWB trouble or a improper PCU PWB has
been installed.
Check and
remedy
Check the PCU PWB.
Details Incompatibility check trouble
An error is detected in the internal incompatibility
check in the engine (PCU).
Section Engine (PCU)
Case 1 Cause PCU PWB trouble or a improper PCU PWB has
been installed.
Check and
remedy
Check the PCU PWB.
Details Incompatibility trouble between the controller and
the engine
Section Controller
Case 1 Cause Improper combination of the controller PWB and
the engine
Check and
remedy
Check the MFP controller PWB.
Details An error is detected in the internal incompatibility
check in the MFP control PWB.
Section MFP control PWB
Case 1 Cause MFP control PWB trouble
Check and
remedy
Check the MFP control PWB
Details An error is detected in the internal incompatibility
check in the MFP control PWB.
Section MFP control PWB
Case 1 Cause MFP control PWB trouble
Check and
remedy
Check the MFP control PWB
Details An error is detected in the internal incompatibility
check in the MFP control PWB.
Section MFP control PWB
Case 1 Cause MFP control PWB trouble
Check and
remedy
Check the MFP control PWB
Details Communication establishment error/ framing/
parity/ protocol error.
Follows the communication protocol
specifications.
Communication error, timing abnormality of the
communication data and the communication
signal line.
Section Controller
Case 1 Cause Defective connection of the slave unit PWB
connector.
Defective harness between the slave unit PWB
and the MFP control PWB.
Slave unit PWB mother board connector pin
breakage.
Check and
remedy
Check connection of the connector between the
slave unit PWB and the MFP control PWB and the
harness.
Check grounding of the machine.
Details Communication establishment error/ framing/
parity/ protocol error
Follows the communication protocol
specifications.
Communication error, timing abnormality of the
communication data and the communication
signal line
Section Controller
Case 1 Cause Defective connection of the slave unit PWB
connector.
Defective harness between the slave unit PWB
and the MFP control PWB.
Slave unit PWB mother board connector pin
breakage.
Check and
remedy
Check connection of the connector between the
slave unit PWB and the MFP control PWB and the
harness.
Check grounding of the machine.
Details Described on the toner density control design
sppecifications and the change request.
When the average of 10 output values of the toner
sensor (sampling data) after completion (3 min) of
the auto development adjustment is smaller than
1.5V.
Section Engine
Case 1 Cause Toner density sensor trouble.
Charging voltage and developing voltage trouble.
Toner density trouble Developing unit trouble PCU
PWB trouble.
Check and
remedy
Use SIM 25-2 to perform the automatic developing
adjustment.
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