Read Sharp MX-M350N / MX-M350U / MX-M450N / MX-M450U (serv.man8) Service Manual online
MX-M350/M450 N/U TROUBLE CODES 11 - 4
E7
06
Content
Decode error trouble
Detail
A decode error occurs during making of
an image.
an image.
Cause
Data error during input from PCI to PM.
PM trouble
Data error during image compression/
transfer.
ICU PWB abnormality
PM trouble
Data error during image compression/
transfer.
ICU PWB abnormality
Check and
remedy
remedy
Check insertion of the PWB. (PCI bus)
If the error occurred in a FAX job, check
installation of the FAX PWB.
For the other cases, check the ICU
PWB.
Replace the ICU PWB.
If the error occurred in a FAX job, check
installation of the FAX PWB.
For the other cases, check the ICU
PWB.
Replace the ICU PWB.
10
Content
Shading trouble (Black correction)
Details
CCD black scan level abnormality
when the copy lamp is off.
when the copy lamp is off.
Cause
Abnormal installation of flat cable to
CCD unit.
CCD unit abnormality
Scanner PWB abnormality
CCD unit.
CCD unit abnormality
Scanner PWB abnormality
Check &
Remedy
Remedy
Check installation of CCD unit flat
cable.
Check CCD unit.
Check scanner PWB.
cable.
Check CCD unit.
Check scanner PWB.
11
Content
Shading trouble
(White correction all
pixel adjustment)
Details
CCD white reference plate scan level
abnormality when the copy lamp is ON.
abnormality when the copy lamp is ON.
Cause
Abnormal installation of flat cable to
CCD unit.
Dirt on mirror, lens, white reference
plate
Copy lamp lighting abnormality
Abnormal installation of CCD unit
CCD unit abnormality
Scanner PWB abnormality
CCD unit.
Dirt on mirror, lens, white reference
plate
Copy lamp lighting abnormality
Abnormal installation of CCD unit
CCD unit abnormality
Scanner PWB abnormality
Check &
Remedy
Remedy
Clean mirror, lens, and white reference
plate.
Check copy lamp light quantity (SIM 5-
3) and lighting.
Check CCD unit.
Check scanner PWB.
plate.
Check copy lamp light quantity (SIM 5-
3) and lighting.
Check CCD unit.
Check scanner PWB.
14
Content
CCD communication trouble
Details
Communication trouble (clock sync)
between scanner PWB and CCD-ASIC
between scanner PWB and CCD-ASIC
Cause
Abnormal installation of harness to
CCD unit
CCD unit abnormality
Scanner PWB abnormality
CCD unit
CCD unit abnormality
Scanner PWB abnormality
Check &
Remedy
Remedy
Check CCD unit harness.
Check CCD unit.
Check scanner PWB.
Check CCD unit.
Check scanner PWB.
17
Content
SPF scanning position adjustment
trouble (Detected only when executing
an adjustment SIM.)
trouble (Detected only when executing
an adjustment SIM.)
Details
The black Mylar which serves as the
reference of the SPF scanning position
is not detected.
reference of the SPF scanning position
is not detected.
Cause
Black Mylar installing failure on the
SPF side
SPF side
Check &
Remedy
Remedy
Check the SPF black Mylar.
MAIN SUB
Details
E7
50
Content
LSU connection trouble
Detail
An LSU which does not conform to the
machine is installed.
machine is installed.
Cause
LSU connection trouble
PCU PWB trouble
LSU trouble
PCU PWB trouble
LSU trouble
Check and
remedy
remedy
Check LSU PWB. Check PCU PWB.
Check connection of the connector and
the harness between PCU and LSU.
Check connection of the connector and
the harness between PCU and LSU.
60
Content
Controller skating trouble
Detail
Occurrence of an error in controller
skating check
skating check
Cause
Discrepancy in the combination of the
controller PWB and the ROM
controller PWB and the ROM
Check and
remedy
remedy
Check the controller PWB.
Check the combination of the controller
PWB and the ROM.
Check the combination of the controller
PWB and the ROM.
80
Content
Communication trouble (ICU detection)
between ICU and scanner
between ICU and scanner
Details
Communication establishment error/
Fleming/Parity/Protocol error
Fleming/Parity/Protocol error
Cause
Defective connection of slave unit PWB
connector
Defective harness between slave unit
PWB and ICU PWB
Slave unit PWB mother board
connector pin breakage
connector
Defective harness between slave unit
PWB and ICU PWB
Slave unit PWB mother board
connector pin breakage
Check &
Remedy
Remedy
Check connector and harness of slave
unit PWB and ICU PWB.
Check grounding of machine.
unit PWB and ICU PWB.
Check grounding of machine.
90
Content
Communication trouble (ICU detection)
between ICU and PCU
between ICU and PCU
Details
Communication establishment error/
Fleming/Parity/Protocol error
Fleming/Parity/Protocol error
Cause
Defective connection of slave unit PWB
connector
Defective harness between slave unit
PWB and ICU PWB
Slave unit PWB mother board
connector pin breakage
connector
Defective harness between slave unit
PWB and ICU PWB
Slave unit PWB mother board
connector pin breakage
Check &
Remedy
Remedy
Check connector and harness of slave
unit PWB and ICU PWB.
Check grounding of machine.
unit PWB and ICU PWB.
Check grounding of machine.
F1
00
Content
Finisher communication trouble
Detail
Communication cable test error after
turning on the power or exiting from
SIM.
Communication error with the finisher
turning on the power or exiting from
SIM.
Communication error with the finisher
Cause
Improper connection or disconnection
of connectors and harness between
the machine and the finisher.
Finisher control PWB trouble
Control PWB (PCU) trouble
Malfunction by noises
of connectors and harness between
the machine and the finisher.
Finisher control PWB trouble
Control PWB (PCU) trouble
Malfunction by noises
Check and
remedy
remedy
Canceled by turning OFF/ON the
power.
Check connectors and harness in the
communication line.
Replace the finisher control PWB or
PCU PWB.
power.
Check connectors and harness in the
communication line.
Replace the finisher control PWB or
PCU PWB.
MAIN SUB
Details
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