Read Sharp MX-6240N / MX-7040N (serv.man26) Service Manual online
MX-7040N TROUBLESHOOTING 7 – 36
F6-97
Incompatibility between FAX control
PWB and the main machine
F6-98
Incompatibility between the FAX
control PWB destination and the main
machine destination
F9-91
Communication error between MFP
and the printer section when booting
F9-92
Printer (section) PWB hardware error
H2-00
Thermistor open trouble
(TH_UM_AD2)
H2-01
Non-contact thermistor lower main
detection thermistor open
(TH_LM1_AD2)
H2-02
Non-contact thermistor upper sub
detection thermistor open
(TH_US1_AD2)
H2-03
Non-contact thermistor upper main
compensation thermistor open
(TH_UM_CS)
Trouble content
Incompatibility between FAX control PWB and the
main machine
main machine
Section
MFP
Case 1
Cause
The FAX control PWB installed is improper.
FAX control PWB trouble.
FAX control PWB trouble.
Check
and
Remedy
and
Remedy
Install a proper FAX control PWB.
Replace the FAX control PWB.
Replace the FAX control PWB.
Trouble content
Incompatibility between the FAX control PWB
destination and the main machine destination
destination and the main machine destination
Section
MFP
Case 1
Cause
Incompatibility between the destination information
written into the FAX control PWB EEPROM and that
in the main machine (set with SIM26-6)
written into the FAX control PWB EEPROM and that
in the main machine (set with SIM26-6)
Check
and
Remedy
and
Remedy
1)
Check the destination of the FAX control PWB.
2)
Check the destination of the machine. (SIM26-6)
Trouble content
Booting of the printer section cannot be recognized
when booting.
when booting.
Detail
MFP
Cause
MFPC (section) PWB trouble.
Printer (section) PWB trouble.
Printer flash ROM trouble.
MFPC (section) PWB - printer (section) PWB
connection trouble.
Printer (section) PWB trouble.
Printer flash ROM trouble.
MFPC (section) PWB - printer (section) PWB
connection trouble.
Check & Remedy
Replace the MFPC (section) PWB.
Replace the printer (section) PWB.
Replace the printer flash ROM.
Check connection between the MFPC (section) PWB
and the printer (section) PWB.
Replace the printer (section) PWB.
Replace the printer flash ROM.
Check connection between the MFPC (section) PWB
and the printer (section) PWB.
Trouble content
Detail
Printer (section) PWB
Cause
Printer PWB trouble
Font ROM contact trouble or error
DIMM memory contact trouble or error
Font ROM contact trouble or error
DIMM memory contact trouble or error
Check & Remedy
Replace the printer PWB.
Check the font ROM socket.
Check the DIMM memory socket.
Check the font ROM.
Replace the DIMM memory.
Check the font ROM socket.
Check the DIMM memory socket.
Check the font ROM.
Replace the DIMM memory.
Trouble content
Detail
PCU
Cause
Thermistor trouble
PCU PWB trouble
Thermistor connector and harness connection trouble
Fusing section connector connection trouble
Fusing unit not installed
PCU PWB trouble
Thermistor connector and harness connection trouble
Fusing section connector connection trouble
Fusing unit not installed
Check & Remedy
Use SIM44-14 to check the state of the thermistor.
Replace the thermistor.
Replace the PCU PWB.
Check connection of the thermistor connector and the
harness.
Check the connector in the fusing section.
Replace the thermistor.
Replace the PCU PWB.
Check connection of the thermistor connector and the
harness.
Check the connector in the fusing section.
Trouble content
The thermistor is open.
Detail
PCU
Cause
Thermistor trouble
Control PWB trouble
Fusing section connector connection trouble
AC power trouble
Fusing unit not installed.
Control PWB trouble
Fusing section connector connection trouble
AC power trouble
Fusing unit not installed.
Check & Remedy
Check connection of the harness and the connector
from the thermistor to the control PWB.
from the thermistor to the control PWB.
Trouble content
The thermistor is open.
Detail
PCU
Cause
Thermistor trouble
Control PWB trouble
Fusing section connector connection trouble
AC power trouble
Fusing unit not installed.
Control PWB trouble
Fusing section connector connection trouble
AC power trouble
Fusing unit not installed.
Check & Remedy
Check connection of the harness and the connector
from the thermistor to the control PWB.
from the thermistor to the control PWB.
Trouble content
The thermistor is open.
Detail
PCU
Cause
Thermistor trouble
Control PWB trouble
Fusing section connector connection trouble
AC power trouble
Fusing unit not installed.
Control PWB trouble
Fusing section connector connection trouble
AC power trouble
Fusing unit not installed.
Check & Remedy
Check connection of the harness and the connector
from the thermistor to the control PWB.
from the thermistor to the control PWB.
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