Read Sharp MX-6240N / MX-7040N (serv.man26) Service Manual online
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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