Sharp MX-4100N Service Manual page 311

U2-24 MFP PWB
authentication counter check sum
error
Trouble content
Detail MFP
Cause MFP PWB SRAM trouble.
MFP PWB trouble.
Strong external noises.
Check & Remedy Use SIM16 to cancel the error.
U2-30 MFP PWB and PCU PWB manufactur-
ing No. data inconsistency
Trouble content
Detail MFP
Cause Inconsistency between the manufacturing No. saved
in the PCU PWB and that in the MFP PWB.
When replacing the PCU PWB or the MFP PWB, the
EEPROM which was mounted on the PWB before
replacement is not mounted on the new PWB.
MFP PWB trouble.
PCU PWB trouble
Check & Remedy Check that the EEPROM is properly set.
Check to confirm that the EEPROM which was
mounted on the PWB before replacement is
mounted on the new PWB.
Replace the MFP PWB.
Replace the PCU PWB.
U2-50 HDD user authentication data check
sum error
Trouble content
Detail MFP
Cause HDD trouble.
MFP PWB trouble.
Strong external noises.
Check & Remedy Initialize the data (one-touch, group, program, etc.)
related to the check sum error by turning OFF/ON
the power.
Since the registered contents are deleted, register
the deleted contents again.
Use SIM16 to cancel the error.
Replace the HDD.
Replace the MFP PWB.
U2-60 Water Mark check error
Trouble content
Detail MFP
Cause Watermark data trouble
Check & Remedy Use SIM49-5 to upload the watermark data.
U2-80 SCU PWB EEPROM read/write error
Trouble content
Detail SCU
Cause SCU PWB EEPROM trouble.
SCU PWB trouble.
EEPROM socket contact trouble.
Check & Remedy Replace the SCU PWB EEPROM.
Replace the SCU PWB.
Check contact of the EEPROM socket.
Put down the counter/adjustment values in the
simulation to prevent against loss of the counter data
and the adjustment values.
Use SIM16 to cancel the trouble.
SRAM memory user
MX-5001N SELF DIAG AND TROUBLE CODE 7 – 25
U2-81 SCU PWB EEPROM check sum error
Trouble content
Detail SCU
Cause SCU PWB EEPROM trouble.
Installation of non-initialized EEPROM.
SCU PWB trouble.
EEPROM socket contact trouble.
Check & Remedy Replace the SCU PWB EEPROM.
Replace the SCU PWB.
Check contact of the EEPROM socket.
Put down the counter/adjustment values in the
simulation to prevent against loss of the counter data
and the adjustment values.
Use SIM16 to cancel the trouble.
U2-90 PCU PWB EEPROM read/write error
Trouble content
Detail PCU
Cause PCU PWB EEPROM trouble.
Installation of non-initialized EEPROM.
PCU PWB trouble
EEPROM socket contact trouble.
Check & Remedy Replace the PCU PWB EEPROM.
Replace the PCU PWB.
Check contact of the EEPROM socket.
Put down the counter/adjustment values in the
simulation to prevent against loss of the counter data
and the adjustment values.
Use SIM16 to cancel the trouble.
U2-91 PCU PWB EEPROM check sum error
Trouble content
Detail PCU
Cause PCU PWB EEPROM trouble.
Installation of non-initialized EEPROM.
PCU PWB trouble
EEPROM socket contact trouble.
Check & Remedy Replace the PCU PWB EEPROM.
Replace the PCU PWB.
Check contact of the EEPROM socket.
Put down the counter/adjustment values in the
simulation to prevent against loss of the counter data
and the adjustment values.
Use SIM16 to cancel the trouble.
U5-00 Document feed unit communication
error
Trouble content
Detail SCU
Cause Connector, harness connection trouble.
SCU PWB trouble.
DSPF PWB trouble.
Check & Remedy Turn OFF/ON the power.
Check connection of the connector and the harness.
Replace the SCU PWB.
Replace the DSPF PWB.