Incompatibility Check (62Ppm); Incompatibility Check (70Ppm); Controller Connection Trouble; Incompatibility Check (55Ppm) - Sharp MX-M550U Service Manual

E7-56

Incompatibility check (62ppm)

(Engine (PCU) detection)
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 Check the PCU PWB.
remedy
E7-57

Incompatibility check (70ppm)

(Engine (PCU) detection)
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 Check the PCU PWB.
remedy
E7-60

Controller connection trouble

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 Check the MFP controller PWB.
remedy
E7-65

Incompatibility check (55ppm)

(MFP controller detection)
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 Check the MFP control PWB
remedy
E7-66 Incompatibility check (62ppm)
(MFP controller detection)
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 Check the MFP control PWB
remedy
E7-67 Incompatibility check (70ppm)
(MFP controller detection)
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 Check the MFP control PWB
remedy
MX-M700N SELF DIAG AND TROUBLE CODE 8 – 9
E7-80 Communication trouble between the
MFP control and the scanner
(MFP control detection)
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 Check connection of the connector between the
remedy slave unit PWB and the MFP control PWB and the
harness.
Check grounding of the machine.
E7-90 MFP control-PCU communication
trouble (MFP control detection)
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 Check connection of the connector between the
remedy slave unit PWB and the MFP control PWB and the
harness.
Check grounding of the machine.
EE-EL Auto developer adjustment trouble
(Overtoner error)
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 Use SIM 25-2 to perform the automatic developing
remedy adjustment.