Read Sharp MX-M850 (serv.man38) Service Manual online
MX-M1100 SELF DIAG AND TROUBLE CODE 8 – 23
H4-02
Lower thermistor low temperature
trouble (PRTH)
trouble (PRTH)
H4-30
Non-contact main thermistor
differential input abnormality (RTH1-d)
differential input abnormality (RTH1-d)
H5-01
POIND not-reached jam is detected
5 times continuously
5 times continuously
H7-10
Low temperature detection in the
reset operation of temperature adjust-
ment after alarm stop in a job
(Noncontact main thermistor(RTH1-d))
reset operation of temperature adjust-
ment after alarm stop in a job
(Noncontact main thermistor(RTH1-d))
H7-11
Low temperature detection in the
reset operation of temperature adjust-
ment after alarm stop in a job
(Sub thermistor (RTH2))
reset operation of temperature adjust-
ment after alarm stop in a job
(Sub thermistor (RTH2))
H7-12
Low temperature detection in the
reset operation of temperature adjust-
ment after alarm stop in a job
(Lower thermistor (RTH2))
reset operation of temperature adjust-
ment after alarm stop in a job
(Lower thermistor (RTH2))
L1-00
Mirror feed trouble
Detail
The set temperature is not reached with the specified
time after turning on the power relay
time after turning on the power relay
Section
PCU
Cause
Thermistor trouble. Heater lamp trouble.
PCU PWB trouble. Thermostat trouble.
AC power source trouble.
Interlock switch trouble
PCU PWB trouble. Thermostat trouble.
AC power source trouble.
Interlock switch trouble
Check &
Remedy
Remedy
Check blinking of the heater lamp with Sim. 5-2.
If the lamp blinks normally, check the thermistor and the
harness.
Check the thermistor input circuit section of the PCU
PWB. If the lamp does not light up, check the heater
lamp and the thermostat for breakage.
Check the interlock switch.
Check the AC PWB and the PCU PWB lamp control
circuit. Cancel the trouble with Sim. 14.
If the lamp blinks normally, check the thermistor and the
harness.
Check the thermistor input circuit section of the PCU
PWB. If the lamp does not light up, check the heater
lamp and the thermostat for breakage.
Check the interlock switch.
Check the AC PWB and the PCU PWB lamp control
circuit. Cancel the trouble with Sim. 14.
Detail
The differential value does not rise above the specified
level within the specified time from turning ON the HL1.
level within the specified time from turning ON the HL1.
Section
PCU
Cause
Thermistor trouble, heater lamp trouble, PCU PWB
trouble, thermostat trouble, AC power trouble. Interlock
switch trouble.
trouble, thermostat trouble, AC power trouble. Interlock
switch trouble.
Check &
Remedy
Remedy
Use Sim. 5-2 to check the flashing operation of the
heater lamp. If the heater lamp flashes normally, check
the thermistor and the harness.
Check the thermistor input circuit section of the PCU
PWB. If the heater lamp does not light up, check for
disconnection of the heater lamp or the thermostat.
Check the interlock switch.
Check the lamp control circuit of the AC PWB and the
PCU PWB. Use Sim. 14 to cancel the trouble.
heater lamp. If the heater lamp flashes normally, check
the thermistor and the harness.
Check the thermistor input circuit section of the PCU
PWB. If the heater lamp does not light up, check for
disconnection of the heater lamp or the thermostat.
Check the interlock switch.
Check the lamp control circuit of the AC PWB and the
PCU PWB. Use Sim. 14 to cancel the trouble.
Detail
POD1 not-reached jam is detected 5 times
continuously.
continuously.
Section
PCU
Cause
A fusing jam is not canceled completely. (Jam paper
remains.)
POD1 sensor trouble or harness connection trouble.
Fusing unit instillation trouble.
remains.)
POD1 sensor trouble or harness connection trouble.
Fusing unit instillation trouble.
Check &
Remedy
Remedy
Check the fusing section jam paper. (winding, etc.)
Check the POD1 sensor harness.
Check installation of the fusing unit.
Cancel the trouble with Sim. 14.
Check the POD1 sensor harness.
Check installation of the fusing unit.
Cancel the trouble with Sim. 14.
Detail
When in fusing alarm stopping, the specified
temperature is not reached within the specified time.
* Alarm stop: When the fusing temperature lowers than
temperature is not reached within the specified time.
* Alarm stop: When the fusing temperature lowers than
the specified level in a print job, the job is interrupted
temporarily and temperature reset is performed.
temporarily and temperature reset is performed.
Section
PCU
Cause
Thermistor trouble, thermostat trouble, heater lamp
trouble, PCU PWB trouble, AC power trouble, interlock
switch trouble, connector and harness connection
trouble.
trouble, PCU PWB trouble, AC power trouble, interlock
switch trouble, connector and harness connection
trouble.
Check &
Remedy
Remedy
Use Sim. 5-2 to check the ON operation of the heater
lamp. Check conduction of the thermostat. Replace the
heater lamp, the PCU PWB, and the AC PWB. Check
connection of the connector and the harness.
lamp. Check conduction of the thermostat. Replace the
heater lamp, the PCU PWB, and the AC PWB. Check
connection of the connector and the harness.
Detail
When in fusing alarm stopping, the specified
temperature is not reached within the specified time.
* Alarm stop: When the fusing temperature lowers than
temperature is not reached within the specified time.
* Alarm stop: When the fusing temperature lowers than
the specified level in a print job, the job is interrupted
temporarily and temperature reset is performed.
temporarily and temperature reset is performed.
Section
PCU
Cause
Thermistor trouble, thermostat trouble, heater lamp
trouble, PCU PWB trouble, AC power trouble, interlock
switch trouble, connector and harness connection
trouble.
trouble, PCU PWB trouble, AC power trouble, interlock
switch trouble, connector and harness connection
trouble.
Check &
Remedy
Remedy
Use Sim. 5-2 to check the ON operation of the heater
lamp.
Check conduction of the thermostat. Replace the heater
lamp, the PCU PWB, and the AC PWB.
Check connection of the connector and the harness.
lamp.
Check conduction of the thermostat. Replace the heater
lamp, the PCU PWB, and the AC PWB.
Check connection of the connector and the harness.
Detail
When in fusing alarm stopping, the specified
temperature is not reached within the specified time.
* When in fusing alarm stopping, the specified
temperature is not reached within the specified time.
* When in fusing alarm stopping, the specified
temperature is not reached within the specified time.
Section
PCU
Cause
Thermistor trouble, thermostat trouble, heater lamp
trouble, PCU PWB trouble, AC power trouble, interlock
switch trouble, connector and harness connection
trouble.
trouble, PCU PWB trouble, AC power trouble, interlock
switch trouble, connector and harness connection
trouble.
Check &
Remedy
Remedy
Use Sim. 5-2 to check the ON operation of the heater
lamp. Check conduction of the thermostat. Replace the
heater lamp, the PCU PWB, and the AC PWB.
Check connection of the connector and the harness.
lamp. Check conduction of the thermostat. Replace the
heater lamp, the PCU PWB, and the AC PWB.
Check connection of the connector and the harness.
Detail
Mirror feed is not completed within the specified time
Section
SCU
Cause
Mirror unit trouble. The mirror wire is disengaged.
Circuit trouble.
Circuit trouble.
Check &
Remedy
Remedy
Use Sim. 1-1 to check the operation of the mirror.
Check the mirror motor related circuits (SCN-Mother
PWB, SCNCNT PWB, MHP sensor PWB).
Check the mirror motor related circuits (SCN-Mother
PWB, SCNCNT PWB, MHP sensor PWB).
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