AR-M550/M620/M700 SELF DIAG MESSAGE AND TROUBLESHOOTING 9 - 13
Main
code
Sub
code
Title
LSU connection trouble
E7 50 Phenomenon Display Lamp
Message
Details LSU connection trouble
The LSU connected does
not conform to the
machine specifications.
When the combination of
the pattern of an input
port on the PCU and the
pattern of a port
connected to the LSU is
not proper.
Section Engine
Operation
mode
Note
Case 1 Trouble
position/
Cause
LSU connection trouble
Remedy Check connection
between the PCU and the
LSU and the harness.
Note
Case 2 Trouble
position/
Cause
PCU PWB trouble
LSU trouble
Remedy Check the LSU. Check
the PCU.
Note
Main
code
Sub
code
Title
Incompatibility check (Engine
(PCU) detection)
E7 55 Phenomenon Display Lamp
56 Message
57 Details Incompatibility check
trouble
An error is detected in the
internal incompatibility
check in the engine
(PCU).
Section Engine (PCU)
Operation
mode
Note
Case 1 Trouble
position/
Cause
PCU PWB trouble or a
improper PCU PWB has
been installed.
Remedy Check the PCU PWB.
Note
Main
code
Sub
code
Title
Controller connection trouble
E7 60 Phenomenon Display Lamp
Message
Details Controller connection
trouble
Incompatibility trouble
between the controller
and the engine
Section Controller
Operation
mode
Note
E7 60 Case 1 Trouble
position/
Cause
Improper combination
of the controller PWB
and the engine
Remedy Check the controller
PWB.
Check combination of
the controller PWB and
the engine.
Note
Main
code
Sub
code
Title
Incompatibility check (MFP
controller detection)
E7 65 Phenomenon Display Lamp
66 Message
67 Details Incompatibility check
trouble
An error is detected in
the internal
incompatibility check in
the MFP control PWB.
Section MFP control PWB
Operation
mode
Note
Case 1 Trouble
position/
Cause
MFP control PWB
trouble or a improper
MFP control PWB has
been installed.
Remedy Check the MFP control
PWB and repair it as
required.
Note
Main
code
Sub
code
Title
Communication trouble between
the MFP control and the scanner
(MFP control detection)
E7 80 Phenomenon Display Lamp
Message
Details Communication trouble
between the MFP control
and the scanner (MFP
control detection)
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
Operation
mode
Note
Main
code
Sub
code
Title
Controller connection trouble
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