Read Sharp MX-M350N / MX-M350U / MX-M450N / MX-M450U (serv.man8) Service Manual online
MX-M350/M450 N/U TROUBLE CODES 11 - 3
3. Details of trouble codes
U7
00 RIC communication trouble
Controller
CH
--
Door open (CH ON)
PCU
00 No developer cartridge
PCU
01 No toner cartridge
PCU
02 No drum cartridge
PCU
EE EL Auto developer adjustment
trouble (Over-toner)
Only during
DIAG
DIAG
PCU
EU Auto developer adjustment
trouble (Under-toner)
Only during
DIAG
DIAG
PCU
PC
--
Personal counter not
installed
installed
Controller
PF
--
RIC copy inhibit signal is
received.
received.
Controller
--
--
Auditor not ready
Controller
MAIN SUB
Details
C1
00
Content
MC trouble
Detail
Main charger output abnormality
(Output open)
Trouble signal is outputted from the
high voltage transformer.
(Output open)
Trouble signal is outputted from the
high voltage transformer.
Cause
The main charger is not installed
properly.
The main charger is not assembled
properly.
Disconnection of connector of high
voltage transformer.
High voltage harness disconnection or
breakage.
properly.
The main charger is not assembled
properly.
Disconnection of connector of high
voltage transformer.
High voltage harness disconnection or
breakage.
Check and
remedy
remedy
Use the SIM 8-2 to check the main
charger output.
Check for disconnection of the main
charger.
Replace the high voltage unit.
charger output.
Check for disconnection of the main
charger.
Replace the high voltage unit.
E6
11
Content
CSI shading trouble (White correction)
Details
The CIS white reference plate scan
level is abnormal when the lamp is on.
level is abnormal when the lamp is on.
Cause
Abnormal harness installation to CIS
unit
Dirt on the white reference plate.
CIS lighting error
CIS unit installation trouble
CIS unit abnormality
Scanner PWB abnormality
unit
Dirt on the white reference plate.
CIS lighting error
CIS unit installation trouble
CIS unit abnormality
Scanner PWB abnormality
Check &
Remedy
Remedy
Clean the white reference plate.
Check CIS light quantity (SIM 5-3) and
lighting.
Check CIS unit harness.
Check scanner PWB.
Check CIS light quantity (SIM 5-3) and
lighting.
Check CIS unit harness.
Check scanner PWB.
14
Content
CIS communication trouble
Details
Communication trouble (clock sync)
between scanner PWB and CIS-ASIC
between scanner PWB and CIS-ASIC
Cause
Abnormal harness installation to CIS
unit
CIS unit abnormality
Scanner PWB abnormality
unit
CIS unit abnormality
Scanner PWB abnormality
Check &
Remedy
Remedy
Check CIS unit harness.
Check CIS unit.
Check scanner PWB.
Check CIS unit.
Check scanner PWB.
Trouble
codes
Contents
Remark
Trouble
detection
E7
01
Content
System data trouble
Detail
When in data storage/acquiring of the
HDD system area, the HDD responds
an error and does not respond for
30sec, it is judged as a trouble.
HDD system area, the HDD responds
an error and does not respond for
30sec, it is judged as a trouble.
Cause
The HDD is not properly installed to the
ICU PWB.
The HDD does not work for the ICU
PWB.
ICU PWB abnormality
ICU PWB.
The HDD does not work for the ICU
PWB.
ICU PWB abnormality
Check and
remedy
remedy
Check installation of the HDD to the
ICU PWB.
Check harness connection of the HDD
from the ICU PWB.
Use SIM62-2, 3 to check the HDD
read/write.
Replace the HDD.
Replace the ICU PWB.
ICU PWB.
Check harness connection of the HDD
from the ICU PWB.
Use SIM62-2, 3 to check the HDD
read/write.
Replace the HDD.
Replace the ICU PWB.
E7
02
Content
Laser trouble
Detail
BD signal from LSU is kept OFF, or ON.
Cause
The connector of LSU or the harness in
LSU is disconnected or broken.
The polygon motor does not rotate
normally.
The laser home position sensor in LSU
is shifted.
The proper voltage is not supplied to
the power line for laser.
Laser emitting diode trouble
PCU PWB trouble
ICU PWB trouble
LSU is disconnected or broken.
The polygon motor does not rotate
normally.
The laser home position sensor in LSU
is shifted.
The proper voltage is not supplied to
the power line for laser.
Laser emitting diode trouble
PCU PWB trouble
ICU PWB trouble
Check and
remedy
remedy
Check for disconnection of the LSU
connector.
Use SIM 61-1 to check LSU operation.
Check that the polygon motor rotates
normally or not.
Check light emission of laser emitting
diode.
Replace the LSU unit.
Replace the PCU PWB.
Replace the ICU PWB.
connector.
Use SIM 61-1 to check LSU operation.
Check that the polygon motor rotates
normally or not.
Check light emission of laser emitting
diode.
Replace the LSU unit.
Replace the PCU PWB.
Replace the ICU PWB.
03
Content
HDD trouble
Detail
HDD connection failure
If the HDD responds an error or does
not respond for 30sec, it is judged as
an error. (Other than the system area)
Data abnormality in the file
management area (when the cluster
chain is broken)
If the HDD responds an error or does
not respond for 30sec, it is judged as
an error. (Other than the system area)
Data abnormality in the file
management area (when the cluster
chain is broken)
Cause
HDD is not installed properly to the ICU
PWB.
HDD does not operate properly in the
ICU PWB.
ICU PWB trouble
PWB.
HDD does not operate properly in the
ICU PWB.
ICU PWB trouble
Check and
remedy
remedy
Check installation of HDD to the ICU
PWB.
Check connection of the harness of
HDD to the ICU PWB.
Use SIM 62-2, -3 to check read/write of
HDD.
Replace HDD.
Replace ICU PWB.
PWB.
Check connection of the harness of
HDD to the ICU PWB.
Use SIM 62-2, -3 to check read/write of
HDD.
Replace HDD.
Replace ICU PWB.
MAIN SUB
Details
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