Read Sharp MX-1800N (serv.man16) Service Manual online
MX-1800N SELF DIAG AND TROUBLE CODE 8 – 13
F1-19
Finisher pre-alignment motor
abnormality
abnormality
F1-20
Finisher after-alignment motor
abnormality
abnormality
F1-21
Finisher fan motor abnormality
(MX-FNX1)
(MX-FNX1)
F1-33
Finisher punch shift motor trouble
F1-34
Finisher punch motor trouble
F1-37
Finisher backup RAM trouble
F1-50
Finisher incompatibility trouble
F2-39
Process thermistor trouble
F2-40
Toner empty sensor abnormality
(BLACK)
(BLACK)
F2-41
Toner empty sensor abnormality
(CYAN)
(CYAN)
Trouble content
Pre-alignment motor trouble
Section
PCU
Case 1
Cause
Motor lock, motor RPM abnormality, motor
overvoltage, saddle finisher control PWB trouble
overvoltage, saddle finisher control PWB trouble
Check and
remedy
remedy
Use SIM3-3 to check the operation of the pre-
alignment motor (FFJM).
Replace the finisher control PWB.
alignment motor (FFJM).
Replace the finisher control PWB.
Trouble content
After-alignment motor trouble
Section
PCU
Case 1
Cause
Motor lock, motor RPM abnormality, motor
overvoltage, finisher control PWB trouble
overvoltage, finisher control PWB trouble
Check and
remedy
remedy
Use SIM3-3 to check the operation of the after-
alignment motor (FRJM).
Replace the finisher control PWB.
alignment motor (FRJM).
Replace the finisher control PWB.
Trouble content
Cooling fan motor trouble (MX-FNX1)
Section
PCU
Case 1
Cause
Motor lock, motor RPM abnormality, motor
overvoltage, finisher control PWB trouble
overvoltage, finisher control PWB trouble
Check and
remedy
remedy
Use SIM3-3 to check the operation of the fan motor
(FFANM).
Replace the finisher control PWB.
(FFANM).
Replace the finisher control PWB.
Trouble content
Punch shift motor operation abnormality
Section
PCU
Case 1
Cause
Motor lock, motor RPM abnormality, motor
overvoltage, finisher control PWB trouble, punch
control PWB trouble
overvoltage, finisher control PWB trouble, punch
control PWB trouble
Check and
remedy
remedy
Use SIM3-3 to check the operation of the punch
shift motor (FPSM).
Replace the finisher punch unit (Replace the
punch control PWB.).
shift motor (FPSM).
Replace the finisher punch unit (Replace the
punch control PWB.).
Trouble content
Punch motor operation abnormality
Section
PCU
Case 1
Cause
Motor lock, motor RPM abnormality, motor
overvoltage, finisher control PWB trouble, punch
control PWB trouble
overvoltage, finisher control PWB trouble, punch
control PWB trouble
Check and
remedy
remedy
Use SIM3-3 to check the operation of the punch
motor (FPNW).
Replace the finisher punch unit (Replace the
punch control PWB.).
motor (FPNW).
Replace the finisher punch unit (Replace the
punch control PWB.).
Trouble content
Backup RAM data garbled
Section
PCU
Case 1
Cause
Finisher control PWB trouble, malfunction due to
electrical noises
electrical noises
Check and
remedy
remedy
Replace the finisher control PWB.
Trouble content
Detection of finisher incompatible with MX-1800
Section
PCU
Case 1
Cause
Connection of the AR-F13, etc. which is
incompatible with MX-1800 is detected.
incompatible with MX-1800 is detected.
Check and
remedy
remedy
Connect the MX-FNX1.
Trouble content
Process thermistor open
Section
PCU
Case 1
Cause
Process thermistor harness connection trouble
Check and
remedy
remedy
Check the connection of the harness, connector of
the process thermistor.
the process thermistor.
Case 2
Cause
Process thermistor trouble
Check and
remedy
remedy
Check the connection of the process thermistor.
Case 3
Cause
PCU PWB trouble
Check and
remedy
remedy
Check the PCU PWB.
Trouble content
Toner empty sensor output abnormality. Sample
level 25 or less or 231 or above.
level 25 or less or 231 or above.
Section
PCU
Case 1
Cause
The connector is not installed.
Check and
remedy
remedy
Check the connection of the connector harness to
the PCU PWB. Check the connection of the toner
empty sensor.
the PCU PWB. Check the connection of the toner
empty sensor.
Case 2
Cause
Connector harness trouble
Check and
remedy
remedy
Check the harness disconnection.
Case 3
Cause
Cartridge trouble
Check and
remedy
remedy
Check the cartridge connection.
Trouble content
Toner empty sensor output abnormality. Sample
level 25 or less or 231 or above.
level 25 or less or 231 or above.
Section
PCU
Case 1
Cause
The connector is not installed.
Check and
remedy
remedy
Check the connection of the connector harness to
the PCU PWB. Check the connection of the toner
empty sensor.
the PCU PWB. Check the connection of the toner
empty sensor.
Case 2
Cause
Connector harness trouble
Check and
remedy
remedy
Check the harness disconnection.
Case 3
Cause
Cartridge trouble
Check and
remedy
remedy
Check the cartridge connection.
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