AR-M550/M620/M700 SELF DIAG MESSAGE AND TROUBLESHOOTING 9 - 34
Main
code
Sub
code
Title
Counter check sum error (MFP
control)
U2 11 Phenomenon Display Lamp
Message
Details Counter data area check
sum error
Section Controller
Operation
mode
Note
Case 1 Trouble
position/
Cause
EEPROM trouble
Remedy Check that the EEPROM
is properly installed.
In the simulation to
prevent against delete of
the counter data/
adjustment values, write
down the counter/
adjustment values.
Note
Case 2 Trouble
position/
Cause
Control circuit runaway
due to noises
Remedy Use SIM 16 to cancel the
U2 trouble.
Note
Case 3 Trouble
position/
Cause
MFP control PWB
EEPROM access circuit
trouble
Remedy Replace the MFP control
PWB.
Note
Main
code
Sub
code
Title
Adjustment value check sum error
(MFP control)
U2 12 Phenomenon Display Lamp
Message
Details Adjustment value data
area check sum error
Section Controller
Operation
mode
Note
Case 1 Trouble
position/
Cause
EEPROM trouble
Remedy Check that the EEPROM
is properly installed.
In the simulation to
prevent against delete of
the counter data/
adjustment values, write
down the counter/
adjustment values.
Note
Case 2 Trouble
position/
Cause
Control circuit runaway
due to noises
Remedy Use SIM 16 to cancel the
U2 trouble.
Note
Case 3 Trouble
position/
Cause
MFP control PWB
EEPROM access circuit
trouble
Remedy Replace the MFP control
PWB.
Note
Main
code
Sub
code
Title
SRAM memory check sum error
(MFP control)
U2 22 Phenomenon Display Lamp
Message
Details MFPC section SRAM
memory check sum error
SRAM check sum error
when turning on the
power.
(If this error occurs,
initialize the one-touch
dial and the FAX soft
switches.)
Section Controller
Operation
mode
Note
Case 1 Trouble
position/
Cause
SRAM trouble
Remedy Initialize the
communication
management table
registered in the SRAM
and the FAX soft switch.
Since the registered data
are deleted, register the
data again.
Note
Case 2 Trouble
position/
Cause
Control circuit runaway
due to noises
Remedy Use SIM 16 to cancel the
U2 trouble.
Note
Case 3 Trouble
position/
Cause
MFP control PWB
EEPROM access circuit
trouble
Remedy Replace the MFP control
PWB.
Note
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