Read Sharp AR-M700 (serv.man28) Service Manual online
AR-M550/M620/M700 SELF DIAG MESSAGE AND TROUBLESHOOTING 9 - 34
Main
code
code
Sub
code
Title
Counter check sum error (MFP
control)
control)
U2
11
Phenomenon
Display
Lamp
Message
Message
Details
Counter data area check
sum error
sum error
Section
Controller
Operation
mode
mode
Note
Case 1
Trouble
position/
Cause
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.
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
position/
Cause
Control circuit runaway
due to noises
due to noises
Remedy
Use SIM 16 to cancel the
U2 trouble.
U2 trouble.
Note
Case 3
Trouble
position/
Cause
position/
Cause
MFP control PWB
EEPROM access circuit
trouble
EEPROM access circuit
trouble
Remedy
Replace the MFP control
PWB.
PWB.
Note
Main
code
code
Sub
code
Title
Adjustment value check sum error
(MFP control)
(MFP control)
U2
12
Phenomenon
Display
Lamp
Message
Details
Adjustment value data
area check sum error
area check sum error
Section
Controller
Operation
mode
Note
mode
Note
Case 1
Trouble
position/
Cause
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.
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
position/
Cause
Control circuit runaway
due to noises
due to noises
Remedy
Use SIM 16 to cancel the
U2 trouble.
U2 trouble.
Note
Case 3
Trouble
position/
Cause
position/
Cause
MFP control PWB
EEPROM access circuit
trouble
EEPROM access circuit
trouble
Remedy
Replace the MFP control
PWB.
PWB.
Note
Main
code
code
Sub
code
Title
SRAM memory check sum error
(MFP control)
(MFP control)
U2
22
Phenomenon
Display
Lamp
Message
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.)
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
mode
Note
Case 1
Trouble
position/
Cause
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.
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
position/
Cause
Control circuit runaway
due to noises
due to noises
Remedy
Use SIM 16 to cancel the
U2 trouble.
U2 trouble.
Note
Case 3
Trouble
position/
Cause
position/
Cause
MFP control PWB
EEPROM access circuit
trouble
EEPROM access circuit
trouble
Remedy
Replace the MFP control
PWB.
PWB.
Note
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