Sharp MX-6240N / MX-7040N (serv.man26) Service Manual ▷ View online
MX-7040N TROUBLESHOOTING 7 – 17
E7-27
LSU LD driver trouble (Y)
E7-28
LSU - PCU connection error
E7-29
LSU ASIC frequency error
E7-42
Image data trouble (Scanner
expansion PWB (ACRE) ASIC)
E7-46
Image data decode error (Scanner
expansion PWB (ACRE) ASIC)
Trouble content
The LSU LD is lighted, the initialization process of the
LD driver is not performed normally.
LD driver is not performed normally.
Detail
PCU
Cause
Disconnection or improper connection of the harness
and the connector between the LD PWB and the LSU
control PWB.
LD PWB, LSU control PWB trouble.
and the connector between the LD PWB and the LSU
control PWB.
LD PWB, LSU control PWB trouble.
Check & Remedy
Use SIM61-01 to check the operations of the LSU.
Check the harness and the connector between the LD
PWB and the LSU control PWB.
Replace the LD PWB and the LSU control PWB.
Check the harness and the connector between the LD
PWB and the LSU control PWB.
Replace the LD PWB and the LSU control PWB.
Trouble content
Detail
PCU
Cause
Communication error between the CPU in the PCU
PWB and the LSU control ASIC.
Improper connection of the communication connector
between the PCU PWB and the LSU control PWB
(interface PWB).
Harness trouble between the PCU PWB and the LSU
control PWB (interface PWB)
PCU PWB trouble.
LSU control PWB trouble.
LSU trouble.
PWB and the LSU control ASIC.
Improper connection of the communication connector
between the PCU PWB and the LSU control PWB
(interface PWB).
Harness trouble between the PCU PWB and the LSU
control PWB (interface PWB)
PCU PWB trouble.
LSU control PWB trouble.
LSU trouble.
Check & Remedy
Check connection of the connector and the harness
between the PCU PWB and the LSU control PWB.
Replace the LSU control PWB.
Replace the PCU PWB.
Replace the LSU.
between the PCU PWB and the LSU control PWB.
Replace the LSU control PWB.
Replace the PCU PWB.
Replace the LSU.
Trouble content
Detail
PCU
Cause
Oscillation abnormality of the external oscillator used
in the LSU ASIC.
LSU ASIC abnormality on the LSU control PWB.
in the LSU ASIC.
LSU ASIC abnormality on the LSU control PWB.
Check & Remedy
Replace the LSU control PWB.
Trouble content
Detail
MFP
Cause
An image data error occurs.
An image data send error occurs.
Scanner expansion PWB (ACRE) connection trouble.
Scanner expansion PWB (ACRE) trouble.
MFPC PWB trouble.
An image data send error occurs.
Scanner expansion PWB (ACRE) connection trouble.
Scanner expansion PWB (ACRE) trouble.
MFPC PWB trouble.
Check & Remedy
Check connection of the scanner expansion PWB
(ACRE).
Check the scanner expansion PWB (ACRE), and
replace if necessary.
Check the MFPC PWB, and replace if necessary.
(ACRE).
Check the scanner expansion PWB (ACRE), and
replace if necessary.
Check the MFPC PWB, and replace if necessary.
Trouble content
Detail
MFP
Cause
A decode error occurs while high compression PDF
images are made. (garbled data)
Scanner expansion PWB (ACRE) connection trouble.
Scanner expansion PWB (ACRE) trouble.
MFPC PWB trouble.
images are made. (garbled data)
Scanner expansion PWB (ACRE) connection trouble.
Scanner expansion PWB (ACRE) trouble.
MFPC PWB trouble.
Check & Remedy
Check connection of the scanner expansion PWB
(ACRE).
Check the scanner expansion PWB (ACRE), and
replace if necessary.
Check the MFPC PWB, and replace if necessary.
(ACRE).
Check the scanner expansion PWB (ACRE), and
replace if necessary.
Check the MFPC PWB, and replace if necessary.
MX-7040N TROUBLESHOOTING 7 – 18
E7-48
Scanner expansion PWB (ACRE) ASIC
memory error
E7-49
Water Mark data error
E7-50
Combination error bet ween PWB a nd
firmware (PCU PWB detection)
E7-60
Combination error bet ween PWB a nd
firmware (MFPC PWB detection)
E7-61
Combination error between the MFPC
PWB and the PCU PWB
(MFPC PWB detection)
E7-80
MFP - SCU PWB communication error
E7-89
Communication error b etween MFPC
PWB CPU and energy-saving NIC
controller
E7-90
MFP - PCU PWB communication error
Trouble content
• DDR calibration error
• DIMM insertion trouble, etc.
• DIMM insertion trouble, etc.
Detail
MFP
Cause
Scanner expansion PWB (ACRE) DIMM trouble,
memory slot trouble.
Scanner expansion PWB (ACRE) DIMM insertion
trouble.
Scanner expansion PWB (ACRE) connection trouble.
Scanner expansion PWB (ACRE) trouble.
MFPC PWB trouble.
memory slot trouble.
Scanner expansion PWB (ACRE) DIMM insertion
trouble.
Scanner expansion PWB (ACRE) connection trouble.
Scanner expansion PWB (ACRE) trouble.
MFPC PWB trouble.
Check & Remedy
Check insertion of the scanner expansion PWB
(ACRE) DIMM memory.
Check the scanner expansion PWB (ACRE) DIMM
memory, and replace if necessary.
Check connection of the scanner expansion PWB
(ACRE).
Check the scanner expansion PWB (ACRE), and
replace if necessary.
Check the MFPC PWB, and replace if necessary.
(ACRE) DIMM memory.
Check the scanner expansion PWB (ACRE) DIMM
memory, and replace if necessary.
Check connection of the scanner expansion PWB
(ACRE).
Check the scanner expansion PWB (ACRE), and
replace if necessary.
Check the MFPC PWB, and replace if necessary.
Trouble content
Detail
MFP
Cause
Watermark data trouble.
HDD trouble.
HDD trouble.
Check & Remedy
Use SIM49-5 to upload the watermark data.
Replace the HDD.
Replace the HDD.
Trouble content
Detail
PCU
Cause
A PWB/firmware/LSU which is not compatible with the
machine specifications is detected.
PCU PWB trouble
LSU trouble
machine specifications is detected.
PCU PWB trouble
LSU trouble
Check & Remedy
Check the kind and the version of the firmware.
Check or replace the LSU.
Check or replace the PCU PWB.
Check or replace the LSU.
Check or replace the PCU PWB.
Trouble content
Detail
MFP
Cause
A PWB/firmware which is not compatible with the
machine specifications is detected in the MFPC PWB.
MFPC PWB trouble.
machine specifications is detected in the MFPC PWB.
MFPC PWB trouble.
Check & Remedy
Check the kind and the version of the firmware.
Check or replace the MFPC PWB.
Check or replace the MFPC PWB.
Trouble content
Detail
MFP
Cause
Combination error between the MFPC PWB and the
PCU PWB.
MFPC PWB trouble.
PCU PWB trouble.
PCU PWB.
MFPC PWB trouble.
PCU PWB trouble.
Check & Remedy
Check the combination between the MFPC PWB and
the PCU PWB.
Replace the MFPC PWB.
Replace the PCU PWB.
the PCU PWB.
Replace the MFPC PWB.
Replace the PCU PWB.
Trouble content
Detail
MFP
Cause
SCU PWB - MFPC PWB connection trouble.
SCU PWB trouble.
MFPC PWB trouble.
SCU PWB trouble.
MFPC PWB trouble.
Check & Remedy
Check connection of the SCU PWB and the MFPC
PWB.
Check the ground.
Replace the SCU PWB.
Replace the MFPC PWB.
PWB.
Check the ground.
Replace the SCU PWB.
Replace the MFPC PWB.
Trouble content
No response can be obtained from the energy-saving
NIC controller.
NIC controller.
Detail
MFP
Cause
MFPC PWB trouble.
Check & Remedy
Replace the MFPC PWB.
Trouble content
Detail
MFP
Cause
PCU PWB - MFPC PWB connection trouble.
PCU PWB trouble.
MFPC PWB trouble.
PCU PWB trouble.
MFPC PWB trouble.
Check & Remedy
Check connection of the PCU PWB and the MFPC
PWB.
Check the ground.
Replace the PCU PWB.
Replace the MFPC PWB.
PWB.
Check the ground.
Replace the PCU PWB.
Replace the MFPC PWB.
MX-7040N TROUBLESHOOTING 7 – 19
E7-91
FAX reception image data error
E7-92
Copy image data error
E7-93
Copy, image send, filing, print image
data process error
E7-94
Image file data process error ( when
importing file data)
E7-95
Printer PWB DIMM memory check
error
E7-96
MFPC PWB DIMM memory check error
E7-A0
LSU EEPROM/LD driver read/write
error (K)
Trouble content
An error of FAX reception image data process occurs.
Detail
MFP
Cause
Image data process abnormality
HDD trouble
SD card trouble or contact error
Image compression data corruption
MFPC PWB trouble
DIMM memory trouble or contact error
FAX control PWB trouble
HDD trouble
SD card trouble or contact error
Image compression data corruption
MFPC PWB trouble
DIMM memory trouble or contact error
FAX control PWB trouble
Check & Remedy
Use SIM60-01 to check the read/write operations of
the memory.
Replace the HDD.
Replace or check installation of the SD card.
Replace the MFPC PWB.
Replace or check installation of the DIMM memory.
Replace the FAX control PWB.
the memory.
Replace the HDD.
Replace or check installation of the SD card.
Replace the MFPC PWB.
Replace or check installation of the DIMM memory.
Replace the FAX control PWB.
Trouble content
An error of copy image data process occurs.
(In Non ERDH)
(In Non ERDH)
Detail
MFP
Cause
Image data process abnormality
HDD trouble
Image compression data corruption
MFPC PWB trouble
DIMM memory trouble or contact error
HDD trouble
Image compression data corruption
MFPC PWB trouble
DIMM memory trouble or contact error
Check & Remedy
Use SIM60-01 to check the read/write operations of
the memory.
Replace the HDD.
Replace the MFPC PWB.
Replace or check installation of the DIMM memory.
the memory.
Replace the HDD.
Replace the MFPC PWB.
Replace or check installation of the DIMM memory.
Trouble content
An image data process error occurs in the following
operation mode:
• Copy (in ERDH)
• Copy composing system function (Water mark)
• When in image send
• When filing documents
• When displaying the preview
• When printing with the GDI/PCL printer
• Copy composing system function (Water mark)
operation mode:
• Copy (in ERDH)
• Copy composing system function (Water mark)
• When in image send
• When filing documents
• When displaying the preview
• When printing with the GDI/PCL printer
• Copy composing system function (Water mark)
Detail
MFP
Cause
Image data process abnormality
HDD trouble
Image compression data corruption
MFPC PWB trouble
DIMM memory trouble or contact error
HDD trouble
Image compression data corruption
MFPC PWB trouble
DIMM memory trouble or contact error
Check & Remedy
Use SIM60-01 to check the read/write operations of
the memory.
Replace the HDD.
Replace the MFPC PWB.
Replace or check installation of the DIMM memory.
the memory.
Replace the HDD.
Replace the MFPC PWB.
Replace or check installation of the DIMM memory.
Trouble content
File image process error (backup restore error) when
importing filing data
importing filing data
Detail
MFP
Cause
Image data process abnormality
HDD trouble
Image compression data corruption
MFPC PWB trouble
DIMM memory trouble or contact error
HDD trouble
Image compression data corruption
MFPC PWB trouble
DIMM memory trouble or contact error
Check & Remedy
Use SIM60-01 to check the read/write operations of
the memory.
Replace the HDD.
Replace the MFPC PWB.
Replace or check installation of the DIMM memory.
the memory.
Replace the HDD.
Replace the MFPC PWB.
Replace or check installation of the DIMM memory.
Trouble content
Printer PWB DIMM memory access trouble
Detail
MFP
Cause
Memory data corruption occurs
Printer PWB trouble
DIMM memory trouble or contact error
Printer PWB trouble
DIMM memory trouble or contact error
Check & Remedy
Use SIM60-01 to check the read/write operations of
the memory.
Replace the printer PWB.
DIMM memory socket check
Replace the DIMM memory.
the memory.
Replace the printer PWB.
DIMM memory socket check
Replace the DIMM memory.
Trouble content
MFPC PWB DIMM memory access trouble
Detail
MFP
Cause
Memory data corruption occurs
MFPC PWB trouble
DIMM memory trouble or contact error
MFPC PWB trouble
DIMM memory trouble or contact error
Check & Remedy
Use SIM60-01 to check the read/write operations of
the memory.
Replace the MFPC PWB.
DIMM memory socket check
Replace the DIMM memory.
the memory.
Replace the MFPC PWB.
DIMM memory socket check
Replace the DIMM memory.
Trouble content
Write error in write sequence of the serial EEPROM/
LD driver for Black
LD driver for Black
Detail
PCU
Cause
EEPROM/LD driver trouble.
EEPROM/LD driver access circuit trouble.
EEPROM/LD driver access circuit trouble.
Check & Remedy
Check connection of the connector and the harness of
the LD PWB and the PCU PWB.
Replace the PCU PWB.
If the above remedies cannot delete the trouble,
replace the LSU.
the LD PWB and the PCU PWB.
Replace the PCU PWB.
If the above remedies cannot delete the trouble,
replace the LSU.
MX-7040N TROUBLESHOOTING 7 – 20
E7-A1
LSU EEPROM/LD driver read/write
error (C)
E7-A2
LSU EEPROM/LD driver read/write
error (M)
E7-A3
LSU EEPROM/LD driver read/write
error (Y)
E7-A5
Installation error of HDD which was
used in the mirroring kit
E7-A6
Compact flash memory trouble
EE-EC
Automatic toner density adjustment
error
EE-EL
Automatic toner density adjustment
error (Over toner)
EE-EU
Automatic toner density adjustment
error (Under toner)
F0-03
Finisher paper exit ro ller lift motor
section abnormality (FNM110)
Trouble content
Write error in write sequence of the serial EEPROM/
LD driver for Cyan
LD driver for Cyan
Detail
PCU
Cause
EEPROM/LD driver trouble.
EEPROM/LD driver access circuit trouble.
EEPROM/LD driver access circuit trouble.
Check & Remedy
Check connection of the connector and the harness of
the LD PWB and the PCU PWB.
Replace the PCU PWB.
If the above remedies cannot delete the trouble,
replace the LSU.
the LD PWB and the PCU PWB.
Replace the PCU PWB.
If the above remedies cannot delete the trouble,
replace the LSU.
Trouble content
Write error in write sequence of the serial EEPROM/
LD driver for Magenta
LD driver for Magenta
Detail
PCU
Cause
EEPROM/LD driver trouble.
EEPROM/LD driver access circuit trouble.
EEPROM/LD driver access circuit trouble.
Check & Remedy
Check connection of the connector and the harness of
the LD PWB and the PCU PWB.
Replace the PCU PWB.
If the above remedies cannot delete the trouble,
replace the LSU.
the LD PWB and the PCU PWB.
Replace the PCU PWB.
If the above remedies cannot delete the trouble,
replace the LSU.
Trouble content
Write error in write sequence of the serial EEPROM/
LD driver for Yellow
LD driver for Yellow
Detail
PCU
Cause
EEPROM/LD driver trouble.
EEPROM/LD driver access circuit trouble.
EEPROM/LD driver access circuit trouble.
Check & Remedy
Check connection of the connector and the harness of
the LD PWB and the PCU PWB.
Replace the PCU PWB.
If the above remedies cannot delete the trouble,
replace the LSU.
the LD PWB and the PCU PWB.
Replace the PCU PWB.
If the above remedies cannot delete the trouble,
replace the LSU.
Trouble content
When a HDD which was used in the mirroring kit is
installed to the MFP without the mirroring kit, its
operation is restricted in order to prevent against
malfunction.
installed to the MFP without the mirroring kit, its
operation is restricted in order to prevent against
malfunction.
Detail
MFP
Cause
A HDD which was used in the mirroring kit is installed
to the MFP without the mirroring kit.
to the MFP without the mirroring kit.
Check & Remedy
Replace the HDD with one which has not been used
in the mirroring kit.
in the mirroring kit.
Trouble content
A read/write access error in the compact flash
memory occurs.
memory occurs.
Detail
Cause
Compact flash memory trouble.
MFPC PWB trouble.
File system control area data trouble.
MFPC PWB trouble.
File system control area data trouble.
Check & Remedy
Replace the compact flash memory.
Replace the MFPC PWB.
Replace the MFPC PWB.
Trouble content
The sampling level in the automatic toner density
adjustment is outside of 128
adjustment is outside of 128
10.
Detail
PCU
Cause
Toner density sensor trouble.
Developing unit trouble.
PCU PWB trouble.
Developing unit trouble.
PCU PWB trouble.
Check & Remedy
Replace the toner density sensor.
Replace the developing unit.
Replace the PCU PWB.
Replace the developing unit.
Replace the PCU PWB.
Trouble content
The sampling level in the automatic toner density
adjustment is 76 or less or the control voltage is 208
or above.
adjustment is 76 or less or the control voltage is 208
or above.
Detail
PCU
Cause
Toner density sensor trouble.
Developing unit trouble.
PCU PWB trouble.
Developing unit trouble.
PCU PWB trouble.
Check & Remedy
Replace the toner density sensor.
Replace the developing unit.
Replace the PCU PWB.
Replace the developing unit.
Replace the PCU PWB.
Trouble content
The sampling level in the automatic toner density
adjustment is 178 or above or the control voltage is 51
or less.
adjustment is 178 or above or the control voltage is 51
or less.
Detail
PCU
Cause
Toner density sensor trouble.
Developing unit trouble.
PCU PWB trouble.
Developing unit trouble.
PCU PWB trouble.
Check & Remedy
Replace the toner density sensor.
Replace the developing unit.
Replace the PCU PWB.
Replace the developing unit.
Replace the PCU PWB.
Trouble content
Finisher paper exit roller lifting operation abnormality.
Detail
PCU
Cause
Motor lock, control PWB trouble, disconnection of
harness or connector, HP sensor breakdown.
harness or connector, HP sensor breakdown.
Check & Remedy
Use SIM3-3 to check the operation of the paper exit
roller lift motor.
Check connection from the control PWB to the motor
and the sensor.
Replace the control PWB, the motor, and the sensor
part.
roller lift motor.
Check connection from the control PWB to the motor
and the sensor.
Replace the control PWB, the motor, and the sensor
part.
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