MX-2300/2700 N/G SELF DIAG AND TROUBLE CODE 8 – 25
U2-10 SRAM user authentication index
check sum error
U2-11 EEPROM check sum error
(MFP detection)
U2-22 SRAM memory check sum error
U2-23 MFPC section SRAM memory
individual data check sum error
U2-24 SRAM memory user authentication
counter check sum error
U2-25 Flash memory user authentication
counter check sum error
U2-30 Serial number data discrepancy
(MFP
↔
PCU)
U2-50 HDD section individual data check
sum error
Trouble content
User index information (basic data of user
authentication) check sum error on the SRAM
Section
MFP
Case 1
Cause
1)
SRAM trouble
2)
Hang-up of the control circuit due to electrical
noises
3)
MFPcnt PWB SRAM access circuit trouble
Check
and
remedy
Use SIM16 to cancel U2 trouble.
Trouble content
Counter information check sum error on the EEPROM
Section
MFP
Case 1
Cause
1)
EEPROM device trouble
2)
EEPROM device contact failure
3)
Device access error due to electrical noises
Check
and
remedy
Use SIM16 to cancel U2 trouble.
Trouble content
MFPcnt PWB SRAM memory check sum error
Section
MFP
Case 1
Cause
SRAM trouble
Check
and
remedy
1)
Initialize the communication management table
registered in SRAM and the FAX soft switch.
2)
Since the registered contents have been deleted,
register them again.
Case 2
Cause
Control circuit hang-up due to electrical noises
Check
and
remedy
Use SIM16 to cancel U2 trouble.
Case 3
Cause
MFPcnt PWB SRAM access circuit trouble
Check
and
remedy
Replace the MFPcnt PWB.
Trouble content
MFPcnt PWB SRAM memory individual data check
sum error (Communication management table, sender
registration data, etc.)
Section
MFP
Case 1
Cause
SRAM trouble
Check
and
remedy
1)
Turn OFF/ON the power to initialize the data
related to the check sum error automatically.
2)
Since the registered contents have been deleted,
register them again.
Case 2
Cause
Control circuit hang-up due to electrical noises
Check
and
remedy
Use SIM16 to cancel U2 trouble.
Case 3
Cause
MFPcnt PWB SRAM access circuit trouble
Check
and
remedy
Replace the MFPcnt PWB.
Trouble content
Check sum error of the user counter on SRAM
Section
MFP
Case 1
Cause
1)
SRAM trouble
2)
Control circuit hang-up due to electrical noises
3)
MFPcnt PWB SRAM access circuit trouble
Check
and
remedy
Use SIM16 to cancel U2 trouble.
Trouble content
Check sum error of the user authentication counter on
FLASH
Section
MFP
Case 1
Cause
Flash trouble. Control circuit hang-up due to electrical
noises
MFPcnt PWB FLASH access circuit trouble.
Check
and
remedy
Use SIM16 to recalculate the check sum of the user
counter and save the normal sum value.
Trouble content
The serial number stored in the PCU differs from that
stored in the MFP.
Section
MFP
Case 1
Cause
EEPROM is not changed when the PCU/MFPcnt
PWB is replaced.
Check
and
remedy
1)
Check that EEPROM is properly set.
2)
Check that EEPROM on the previous PWB is
inserted to the newly installed PWB.
Trouble content
MFPcnt HDD individual data check sum error (One-
touch, group, program, etc.)
Section
MFP
Case 1
Cause
Write/read error to/from HDD
Check
and
remedy
1)
Turn OFF/ON the power to initialize the data
related to the check sum error contents.
2)
Since the registered contents have been deleted,
register them again.
3)
If the trouble is not canceled, replace the HDD.
Case 2
Cause
Control circuit hang-up due to electrical noises
Check
and
remedy
Use SIM16 to cancel U2 trouble.
Case 3
Cause
MFPcnt PWB HDD access circuit trouble
Check
and
remedy
Replace the MFPcnt PWB.