Sharp AR-M550N - Page 390

AR-M550/M620/M700 SELF DIAG MESSAGE AND TROUBLESHOOTING 9 - 35
Main
code
Sub
code
Title
SRAM memory individual data
check sum error
U2 23 Phenomenon Display Lamp
Message
Details Check sum error for every
individual data in SRAM
of the MFPC section
when turning on the
power
(If this error occurs,
initialize the data related
to the check sum error.
(Communication
management table,
sender’s information, etc.)
Section Controller
Operation
mode
Note
Case 1 Trouble
position/
Cause
SRAM trouble
Remedy Automatically initialize the
data related to the check
sum error by turning OFF/
ON the power.
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
Main
code
Sub
code
Title
HDD section individual data check
sum error (MFP control)
U2 50 Phenomenon Display Lamp
Message
Details Check sum error for
every individual data in
HDD of the MFPC section
when turning on the
power
(If this error occurs,
initialize the data related
to the check sum error.
(One-touch, group,
program, etc.)
Section Controller
Operation
mode
Note
Case 1 Trouble
position/
Cause
HDD write/read error
Remedy Automatically initialize the
data related to the check
sum error by turning OFF/
ON the power.
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 HDD
access circuit trouble
Remedy Replace the HDD.
Replace the MFP control
PWB.
Note