Read Sharp MX-6240N / MX-7040N (serv.man26) Service Manual online
MX-7040N TROUBLESHOOTING 7 – 44
L8-11
AC Cord 2 (power for fusing) full wave
not detected
L8-12
AC Cord 2 (power for fusing) full wave
signal width abnormality
L8-20
Communication error of MFPC PWB/
SCN mother board
P1-00
PCI communication error
P1-01
PCI fan error
P1-02
Plasma generating device error
PC--
Personal counter not detected
U1-01
Battery trouble
U2-00
MFP EEPROM read/write error
Trouble content
The full wave signal is not detected.
Detail
PCU
Cause
PCU PWB trouble.
Power unit trouble.
Harness trouble.
Disconnection of the AC cord 2.
AC SUB PWB trouble.
Power unit trouble.
Harness trouble.
Disconnection of the AC cord 2.
AC SUB PWB trouble.
Check & Remedy
Replace the PCU PWB.
Replace the power unit.
Check connection of the connector and the harness.
Check the connection of the AC cord 2.
Replace the AC SUB PWB
Replace the power unit.
Check connection of the connector and the harness.
Check the connection of the AC cord 2.
Replace the AC SUB PWB
Trouble content
The frequency of the full wave signal is judged as
abnormal.
abnormal.
Detail
PCU
Cause
PCU PWB trouble.
Power unit trouble.
Harness trouble.
AC SUB PWB trouble.
Power frequency, waveform abnormality.
Power unit trouble.
Harness trouble.
AC SUB PWB trouble.
Power frequency, waveform abnormality.
Check & Remedy
Replace the PCU PWB.
Replace the power unit.
Check connection of the connector and the harness.
Replace the AC SUB PWB.
Check the power waveform.
Replace the power unit.
Check connection of the connector and the harness.
Replace the AC SUB PWB.
Check the power waveform.
Trouble content
Detail
MFP
Cause
SCN mother board PWB - MFPC PWB connection
trouble.
MFPC PWB trouble.
SCN mother board trouble.
trouble.
MFPC PWB trouble.
SCN mother board trouble.
Check & Remedy
Check connection between the SCN mother board
PWB and the MFPC PWB.
Check the ground of the main unit.
Replace the MFPC PWB.
Replace the SCN mother board.
PWB and the MFPC PWB.
Check the ground of the main unit.
Replace the MFPC PWB.
Replace the SCN mother board.
Trouble content
Detail
MFP
Cause
Communication error between the MFPC PWB and
the PCI.
Connection failure of connectors and harness
between the MFPC PWB and the PCI.
MFPC PWB trouble.
PCI control PWB trouble.
the PCI.
Connection failure of connectors and harness
between the MFPC PWB and the PCI.
MFPC PWB trouble.
PCI control PWB trouble.
Check & Remedy
Check connection of the harness and connectors
between the MFPC PWB and the PCI.
Check the MFPC PWB, and replace if necessary.
(Refer to the necessary procedures after replacement
of the MFPC PWB in the Service Manual, and
perform the procedures.)
Check the PCI control PWB, and replace if
necessary.
between the MFPC PWB and the PCI.
Check the MFPC PWB, and replace if necessary.
(Refer to the necessary procedures after replacement
of the MFPC PWB in the Service Manual, and
perform the procedures.)
Check the PCI control PWB, and replace if
necessary.
Trouble content
Detail
MFP
Cause
The PCI fan operation signal is not detected.
PCI fan trouble.
PCI control PWB trouble.
PCI fan trouble.
PCI control PWB trouble.
Check & Remedy
Check connection of the connectors and harness
between the PCI fan and the PCI control PWB.
Check the PCI control PWB, and replace if
necessary.
Check the PCI fan, and replace if necessary.
between the PCI fan and the PCI control PWB.
Check the PCI control PWB, and replace if
necessary.
Check the PCI fan, and replace if necessary.
Trouble content
Detail
MFP
Cause
Connection failure of connectors and harness
between the plasma generating device and the PCI
control PWB.
Plasma generating device trouble.
PCI control PWB trouble.
between the plasma generating device and the PCI
control PWB.
Plasma generating device trouble.
PCI control PWB trouble.
Check & Remedy
Check connection of the connectors and harness
between the plasma generating device and the PCI
control PWB.
Replace the plasma generating device.
Check the PCI control PWB, and replace if
necessary.
between the plasma generating device and the PCI
control PWB.
Replace the plasma generating device.
Check the PCI control PWB, and replace if
necessary.
Trouble content
Detail
MFP
Cause
The personal counter is not installed.
The personal counter is not detected.
SCU PWB trouble.
The personal counter is not detected.
SCU PWB trouble.
Check & Remedy
Check connection of the connectors and the harness.
Replace the SCU PWB.
Replace the SCU PWB.
Trouble content
RTC backup battery voltage fall
Detail
MFP
Case 1
Cause
1)
Battery life
2)
Battery circuit abnormality
Check
and
Remedy
and
Remedy
Check to confirm that the battery voltage is about
2.5V or above.
Replace the battery.
2.5V or above.
Replace the battery.
Trouble content
Detail
MFP
Cause
MFPC PWB EEPROM trouble
EEPROM socket contact trouble
MFPC PWB trouble
Strong external noises.
EEPROM socket contact trouble
MFPC PWB trouble
Strong external noises.
Check & Remedy
Replace the MFPC PWB EEPROM.
Replace the MFPC PWB.
(Refer to the pages on the necessary works after
replacing the MFPC PWB in the Service Manual, and
perform the works.)
Check the power environment.
Replace the MFPC PWB.
(Refer to the pages on the necessary works after
replacing the MFPC PWB in the Service Manual, and
perform the works.)
Check the power environment.
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