Sharp AR-M455N Service Manual page 228

MAIN SUB
U2 11 Content Counter check sum error (ICU)
Detail Counter data area check sum error
Cause EEPROM trouble
Control circuit trouble by noise
ICU PWB EEPROM access circuit
trouble
Check and Check that EEPROM is properly
remedy inserted.
Save the counter/adjustment values
with the DIAG simulation.
Use DIAG (SIM16) to cancel U2
trouble.
Replace the ICU PWB.
12 Content Adjustment value check sum error
(ICU)
Detail Adjustment data area check sum error
Cause EEPROM trouble
Control circuit trouble by noise
ICU PWB EEPROM access circuit
trouble
Check and Check that EEPROM is properly
remedy inserted.
Save the counter/adjustment values
with the simulation.
Use SIM16 to cancel U2 trouble.
Replace the ICU PWB.
22 Content SRAM memory check sum error (ICU)
Detail MFPC section SRAM memory check
sum error
Cause SRAM trouble
Control circuit runaway due to noises
ICU PWB SRAM access circuit trouble
Check and Initialize the communication
remedy management table registered in the
SRAM and the FAX soft switch.
Since the registered data are deleted,
register the data again.
Use SIM16 to cancel U2 trouble.
Replace the ICU PWB.
23 Content SRAM memory individual data check
sum error (ICU)
Detail Check sum error for every data in the
SRAM memory of the MFPC section
(Communication management table,
sender registration data, etc.)
Cause SRAM trouble
Control circuit runaway due to noises
ICU PWB SRAM access circuit trouble
Check and Automatically initialize the data related
remedy to the check sum error by turning OFF/
ON the power.
Since the registered data are deleted,
register the data again.
Use SIM16 to cancel U2 trouble.
Replace the ICU PWB.
Details
AR-M355N/M455N TROUBLE CODES 11 - 11
MAIN SUB
U2 50 Content HD section individual data check sum
error (ICU)
Detail Check sum error for every individual
data in HD of the MFPC section (One-
touch, Group, Program, etc.)
Cause HDD write/read error
Control circuit runaway due to noises
ICU PWB HD access circuit trouble
Check and Automatically initialize the data related
remedy to the check sum error by turning OFF/
ON the power.
Since the registered data are deleted,
register the data again.
Use SIM 16 to cancel the U2 trouble.
Replace the HD PWB.
Replace the ICU PWB.
80 Content EEPROM read/write error (Scanner)
Details Scanner EEPROM write error
Cause EEPROM abnormality
Scanner PWB EEPROM access circuit
abnormality
Check & Check that EEPROM is set properly.
Remedy Record counter/adjustment values with
the simulation to protect the data from
being deleted.
Cancel U2 trouble with SIM 16.
Replace scanner PWB.
81 Content Memory check sum error (Scanner)
Details Scanner memory check sum error
Cause EEPROM trouble
EEPROM which is not initialized is
installed.
Control circuit freeze by noises
Scanner PWB EEPROM access circuit
trouble
Check & Check that EEPROM is set properly.
Remedy Record counter/adjustment values with
the simulation to protect the data from
being deleted.
Cancel U2 trouble with SIM 16.
Replace scanner PWB.
90 Content EEPROM read/write error (PCU)
Detail PCU EEPROM write error
Cause EEPROM trouble
PCU PWB EEPROM access circuit
trouble
Check and Check that EEPROM is properly
remedy inserted.
Record counter/adjustment values with
the simulation to protect the data from
being deleted.
Use SIM16 to cancel U2 trouble.
Replace the Controller PWB.
91 Content Memory check sum error (PCU)
Detail PCU memory check sum error
Cause EEPROM trouble
EEPROM which is not initialized is
installed.
EEPROM is not initialized.
PCU PWB EEPROM access circuit
trouble
Hang of control circuit due to noises
Check and Check that EEPROM is properly
remedy inserted.
Save the counter/adjustment values
with the simulation.
Use SIM16 to cancel U2 trouble.
Replace the Controller PWB.
Details