Read Sharp MX-1800N (serv.man16) Service Manual online
MX-1800N SELF DIAG AND TROUBLE CODE 8 – 15
F2-51
CL phase sensor sensing trouble
F2-58
Process humidity sensor trouble
F2-64
Toner supply abnormality (BLACK)
F2-65
Toner supply abnormality (CYAN)
F2-66
Toner supply abnormality (MAGENTA)
F2-67
Toner supply abnormality (YELLOW)
Trouble content
Detection is made by interruption of light in the
sensor section of the projection rib on the drum
drive gear to control the phases of all the color
drums. The detection signal cannot be acquired
and phase control cannot be made.
sensor section of the projection rib on the drum
drive gear to control the phases of all the color
drums. The detection signal cannot be acquired
and phase control cannot be made.
Section
PCU
Case 1
Cause
Sensor connector connection trouble
Check and
remedy
remedy
Check the sensor connector connection.
Case 2
Cause
Dirt on the sensor light emitting section, or
installation trouble
installation trouble
Check and
remedy
remedy
Check for dirt on the sensor or check the
installation state.
installation state.
Case 3
Cause
Drum drive gear upper rib breakage, sensor
trouble
trouble
Check and
remedy
remedy
If there is no trouble in the rib, replace the sensor.
(Use SIM30-1 "DHPD_CL" to check interruption or
transmission of light.)
(Use SIM30-1 "DHPD_CL" to check interruption or
transmission of light.)
Trouble content
Process humidity sensor open
Section
PCU
Case 1
Cause
Process humidity sensor harness connection
trouble
trouble
Check and
remedy
remedy
Check the harness and connector connection of
the process humidity sensor.
the process humidity sensor.
Case 2
Cause
Process humidity sensor trouble
Check and
remedy
remedy
Check the process humidity sensor.
Case 3
Cause
PCU PWB trouble
Check and
remedy
remedy
Check the PCU PWB.
Trouble content
Toner end with the remaining quantity of 50% or
more.
The toner supply time exceeds 3 times as much as
the specified time.
more.
The toner supply time exceeds 3 times as much as
the specified time.
Section
PCU
Case 1
Cause
Toner motor section connector harness trouble
Check and
remedy
remedy
Check the connector connection of the toner motor
section.
Check the connector harness (TM) connection to
the main PWB.
section.
Check the connector harness (TM) connection to
the main PWB.
Case 2
Cause
Toner motor and toner density sensor trouble
Check and
remedy
remedy
Check the toner density sensor output. (SIM25-1)
Check that the toner transport pipe is not clogged
between the toner cartridge and the developing
unit. Replace the toner cartridge (CRUM) if
necessary.
If replacement of the toner cartridge (CRUM) does
not clear the trouble, check the developing unit.
Check that the toner transport pipe is not clogged
between the toner cartridge and the developing
unit. Replace the toner cartridge (CRUM) if
necessary.
If replacement of the toner cartridge (CRUM) does
not clear the trouble, check the developing unit.
Trouble content
Toner end with the remaining quantity of 50% or
more.
The toner supply time exceeds 3 times as much as
the specified time.
more.
The toner supply time exceeds 3 times as much as
the specified time.
Section
PCU
Case 1
Cause
Toner motor section connector harness trouble
Check and
remedy
remedy
Check the connector connection of the toner motor
section.
Check the connector harness (TM) connection to
the main PWB.
section.
Check the connector harness (TM) connection to
the main PWB.
Case 2
Cause
Toner motor and toner density sensor trouble
Check and
remedy
remedy
Check the toner density sensor output. (SIM25-1)
Check that the toner transport pipe is not clogged
between the toner cartridge and the developing
unit. Replace the toner cartridge (CRUM) if
necessary.
If replacement of the toner cartridge (CRUM) does
not clear the trouble, check the developing unit.
Check that the toner transport pipe is not clogged
between the toner cartridge and the developing
unit. Replace the toner cartridge (CRUM) if
necessary.
If replacement of the toner cartridge (CRUM) does
not clear the trouble, check the developing unit.
Trouble content
Toner end with the remaining quantity of 50% or
more.
The toner supply time exceeds 3 times as much as
the specified time.
more.
The toner supply time exceeds 3 times as much as
the specified time.
Section
PCU
Case 1
Cause
Toner motor section connector harness trouble
Check and
remedy
remedy
Check the connector connection of the toner motor
section.
Check the connector harness (TM) connection to
the main PWB.
section.
Check the connector harness (TM) connection to
the main PWB.
Case 2
Cause
Toner motor and toner density sensor trouble
Check and
remedy
remedy
Check the toner density sensor output. (SIM25-1)
Check that the toner transport pipe is not clogged
between the toner cartridge and the developing
unit. Replace the toner cartridge (CRUM) if
necessary.
If replacement of the toner cartridge (CRUM) does
not clear the trouble, check the developing unit.
Check that the toner transport pipe is not clogged
between the toner cartridge and the developing
unit. Replace the toner cartridge (CRUM) if
necessary.
If replacement of the toner cartridge (CRUM) does
not clear the trouble, check the developing unit.
Trouble content
Toner end with the remaining quantity of 50% or
more.
The toner supply time exceeds 3 times as much as
the specified time.
more.
The toner supply time exceeds 3 times as much as
the specified time.
Section
PCU
Case 1
Cause
Toner motor section connector harness trouble
Check and
remedy
remedy
Check the connector connection of the toner motor
section.
Check the connector harness (TM) connection to
the main PWB.
section.
Check the connector harness (TM) connection to
the main PWB.
Case 2
Cause
Toner motor and toner density sensor trouble
Check and
remedy
remedy
Check the toner density sensor output. (SIM25-1)
Check that the toner transport pipe is not clogged
between the toner cartridge and the developing
unit. Replace the toner cartridge (CRUM) if
necessary.
If replacement of the toner cartridge (CRUM) does
not clear the trouble, check the developing unit.
Check that the toner transport pipe is not clogged
between the toner cartridge and the developing
unit. Replace the toner cartridge (CRUM) if
necessary.
If replacement of the toner cartridge (CRUM) does
not clear the trouble, check the developing unit.
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