Sharp MX4100N常見故障代碼描述,英文手冊2
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Code: F1-50
Description:
Main unit - Finisher combination error
Causes:
The finisher which is not supported by the main unit model is installed. Finisher control PWB trouble.
Remedy:
Install a proper finisher. Replace the finisher control PWB.
Code: F2-22
Description:
Discharge lamp trouble (K)
A trouble is detected when the discharge lamp open sensor is open for 1 sec after turning ON the discharge lamp.
Causes:
Contact trouble between the discharge lamp PWB (K) and the PCU PWB. Discharge lamp PWB (K) trouble. PCU PWB trouble.
Remedy:
Replace the discharge lamp PWB (K). Check the harness and the connector. Replace the PCU PWB.
Code: F2-23
Description:
Discharge lamp trouble (C)
A trouble is detected when the discharge lamp open sensor is open for 1 sec after turning ON the discharge lamp.
Causes:
Contact trouble between the discharge lamp PWB (C) and the PCU PWB. Discharge lamp PWB (C) trouble. PCU PWB trouble.
Remedy:
Replace the discharge lamp PWB (C). Check the harness and the connector. Replace the PCU PWB.
Code: F2-24
Description:
Discharge lamp trouble (M)
A trouble is detected when the discharge lamp open sensor is open for 1 sec after turning ON the discharge lamp.
Causes:
Contact trouble between the discharge lamp PWB (M) and the PCU PWB. Discharge lamp PWB (M) trouble. PCU PWB trouble.
Remedy:
Replace the discharge lamp PWB (M). Check the harness and the connector. Replace the PCU PWB.
Code: F2-25
Description:
Discharge lamp trouble (Y)
A trouble is detected when the discharge lamp open sensor is open for 1 sec after turning ON the discharge lamp.
Causes:
Contact trouble between the discharge lamp PWB (Y) and the PCU PWB. Discharge lamp PWB (Y) trouble. PCU PWB trouble.
Remedy:
Replace the discharge lamp PWB (Y). Check the harness and the connector. Replace the PCU PWB.
Code: F2-39
Description:
Process thermister trouble
Causes:
Process thermister trouble. Process thermister harness connection trouble. PCU PWB trouble
Remedy:
Replace the process thermistor. Check connection of the harness and the connector. Replace the PCU PWB.
Code: F2-40
Description:
Toner density sensor trouble (BLACK)
Causes:
Toner density sensor output abnormality (Sample level 25 or less, or 231 or above) Connection trouble of the connector and the harness. Developing unit trouble. PCU PWB trouble
Remedy:
Replace the toner density sensor. Check connection of the connector and the harness. Replace the developing unit. Replace the PCU PWB.
Code: F2-41
Description:
Toner density sensor trouble (CYAN)
Causes:
Toner density sensor output abnormality (Sample level 25 or less, or 231 or above) Connection trouble of the connector and the harness. Developing unit trouble. PCU PWB trouble
Remedy:
Replace the toner density sensor. Check connection of the connector and the harness. Replace the developing unit. Replace the PCU PWB.
Code: F2-42
Description:
Toner density sensor trouble (MAGENTA)
Causes:
Toner density sensor output abnormality (Sample level 25 or less, or 231 or above) Connection trouble of the connector and the harness. Developing unit trouble. PCU PWB trouble
Remedy:
Replace the toner density sensor. Check connection of the connector and the harness. Replace the developing unit. Replace the PCU PWB.
Code: F2-43
Description:
Toner density sensor trouble (YELLOW)
Causes:
Toner density sensor output abnormality (Sample level 25 or less, or 231 or above). Connection trouble of the connector and the harness. Developing unit trouble. PCU PWB trouble.
Remedy:
Replace the toner density sensor. Check connection of the connector and the harness. Replace the developing unit. Replace the PCU PWB.
Code: F2-45
Description:
Color image density sensor trouble
Causes:
Color image density sensor sensitivity adjustment trouble. Color image density sensor trouble. Harness and connector connection trouble. Image density sensor dirt. Calibration plate dirt. Calibration plate solenoid trouble. PCU PWB trouble.
Remedy:
Replace the color image density sensor. Check connection of the connectors and the harness. Clean the image density sensor. Replace the calibration plate. Replace the calibration plate solenoid. Replace the PCU PWB. Use SIM44-2 to adjust the process control sensor sensitivity.
Code: F2-49
Description:
LSU thermister trouble
Causes:
The LSU detection temperature is outside of -28C - 78C. LSU thermister trouble. Harness and connector connection trouble. PCU PWB trouble LSU control PWB trouble.
Remedy:
Replace the LSU thermistor. Check connection of the connectors and the harness. Replace the PCU PWB. Replace the LSU control PWB. Replace the LSU.
Code: F2-50
Description:
K drum phase sensor trouble
Causes:
Drum phase sensor trouble. Harness and connector connection trouble. Drum drive section trouble. PCU PWB trouble
Remedy:
Use SIM30-1 to check the operation of "DhpD_K.". Replace the drum phase sensor. Check connection of the connectors and the harness. Repair the drum drive section. Replace the PCU PWB.
Code: F2-51
Description:
CL drum phase sensor trouble (41-sheet machine) CL drum phase sensor trouble (CYAN) (50-sheet machine)
Causes:
Drum phase sensor trouble. Harness and connector connection trouble. Drum drive section trouble.
PCU PWB trouble.
Remedy:
Use SIM30-1 to check the operation of "DhpD_CL". Replace the drum phase sensor. Check connection of the connectors and the harness. Repair the drum drive section. Replace the PCU PWB.
Code: F2-52
Description:
CL drum phase sensor trouble (MAGENTA) (50-sheet machine)
Causes:
Drum phase sensor trouble. Harness and connector connection trouble. Drum drive section trouble. PCU PWB trouble.
Remedy:
Use SIM30-1 to check the operation of "DhpD_CL". Replace the drum phase sensor. Check connection of the connectors and the harness. Repair the drum drive section. Replace the PCU PWB.
Code: F2-53
Description:
CL drum phase sensor trouble (YELLOW) (50-sheet machine)
Causes:
Drum phase sensor trouble. Harness and connector connection trouble. Drum drive section trouble. PCU PWB trouble.
Remedy:
Use SIM30-1 to check the operation of "DhpD_CL". Replace the drum phase sensor. Check connection of the connectors and the harness. Repair the drum drive section. Replace the PCU PWB.
Code: F2-58
Description:
Process humidity sensor trouble
Causes:
Process humidity sensor trouble. Harness and connector connection trouble. PCU PWB trouble.
Remedy:
Replace the process humidity sensor. Check connection of the connectors and the harness. Replace the PCU PWB.
Code: F2-64
Description:
Toner supply operation trouble (BK)
Causes:
Toner motor trouble. Toner density sensor trouble. Connector/harness trouble. PCU PWB trouble. Toner cartridge trouble. Developing unit trouble.
Remedy:
Replace the toner motor. Replace the toner density sensor. Connector/harness trouble. Replace the PCU PWB. Replace the toner cartridge. Replace the developing unit.
Code: F2-65
Description:
Toner supply operation trouble (C)
Causes:
Toner motor trouble. Toner density sensor trouble. Connector/harness trouble. PCU PWB trouble Toner cartridge trouble. Developing unit trouble.
Remedy:
Replace the toner motor. Replace the toner density sensor. Connector/harness trouble. Replace the PCU PWB. Replace the toner cartridge. Replace the developing unit.
Code: F2-66
Description:
Toner supply operation trouble (M)
Causes:
Toner motor trouble. Toner density sensor trouble. Connector/harness trouble. PCU PWB trouble Toner cartridge trouble. Developing unit trouble.
Remedy:
Replace the toner motor. Replace the toner density sensor. Connector/harness trouble. Replace the PCU PWB. Replace the toner cartridge. Replace the developing unit.
Code: F2-67
Description:
Toner supply operation trouble (Y)
Causes:
Toner motor trouble. Toner density sensor trouble. Connector/harness trouble. PCU PWB trouble Toner cartridge trouble. Developing unit trouble.
Remedy:
Replace the toner motor. Replace the toner density sensor. Connector/harness trouble. Replace the PCU PWB. Replace the toner cartridge. Replace the developing unit.
Code: F2-70
Description:
Improper toner cartridge detection (BLACK)
Causes:
An improper toner cartridge is inserted. (The main unit detects a toner cartridge of a different specification.) Toner cartridge trouble. PCU PWB trouble
Remedy:
Replace the toner cartridge. Replace the PCU PWB.
Code: F2-71
Description:
Improper toner cartridge detection (CYAN)
Causes:
An improper toner cartridge is inserted. (The main unit detects a toner cartridge of a different specification.) Toner cartridge trouble. PCU PWB trouble.
Remedy:
Replace the toner cartridge. Replace the PCU PWB.
Code: F2-72
Description:
Improper toner cartridge detection (MAGENTA)
Causes:
An improper toner cartridge is inserted. (The main unit detects a toner cartridge of a different specification.) Toner cartridge trouble. PCU PWB trouble.
Remedy:
Replace the toner cartridge. Replace the PCU PWB.
Code: F2-73
Description:
Improper toner cartridge detection (YELLOW)
Causes:
An improper toner cartridge is inserted. (The main unit detects a toner cartridge of a different specification.) Toner cartridge trouble. PCU PWB trouble.
Remedy:
Replace the toner cartridge. Replace the PCU PWB.
Code: F2-74
Description:
CRUM error (BLACK)
Causes:
Toner cartridge (CRUM) trouble. PCU PWB trouble. Connector/harness trouble.
Remedy:
Replace the toner cartridge. Replace the PCU PWB. Connector/harness trouble.
Code: F2-75
Description:
CRUM error (CYAN)
Causes:
Toner cartridge (CRUM) trouble. PCU PWB trouble. Connector/harness trouble.
Remedy:
Replace the toner cartridge. Replace the PCU PWB. Connector/harness trouble.
Code: F2-76
Description:
CRUM error (MAGENTA)
Causes:
Toner cartridge (CRUM) trouble. PCU PWB trouble. Connector/harness trouble.
Remedy:
Replace the toner cartridge. Replace the PCU PWB. Connector/harness trouble.
Code: F2-77
Description:
CRUM error (YELLOW)
Causes:
Toner cartridge (CRUM) trouble. PCU PWB trouble. Connector/harness trouble.
Remedy:
Replace the toner cartridge. Replace the PCU PWB. Connector/harness trouble.
Code: F2-78
Description:
Registration image density sensor trouble (Transfer belt substrate reflection rate abnormality)
Causes:
Image density (registration) sensor trouble (Sensor sensitivity adjustment trouble). PCU PWB trouble. Connection trouble of the connector and the harness. Image density (registration) sensor dirt. Transfer belt dirt, scratch.
Remedy:
Replace the image density (registration) sensor. Replace the PCU PWB. Check connection of the connector and the harness. Clean the image density (registration) sensor. Clean or replace the transfer belt.
Code: F3-12
Description:
Paper feed tray 1 lift operation trouble
Causes:
LUD1 is not turned ON within the specified time. CLUD1 sensor trouble Paper feed tray 1 lift unit trouble. PCU PWB trouble. Harness and connector connection trouble.
Remedy:
Check connection of the harness and the connector of LUD1. Replace the lift-up unit. Replace the PCU PWB.
Code: F3-22
Description:
Paper feed tray 2 lift operation trouble
LUD2 does not turn ON within the specified time
Causes:
LUD2 does not turn ON within the specified time. CLUD2 sensor trouble. Paper feed tray 2 lift unit trouble. PCU PWB trouble. Harness and connector connection trouble.
Remedy:
Check the harness and the connector of LUD2. Replace the lift-up unit. Replace the PCU PWB.
Code: H2-00
Description:
Thermister open trouble (TH_UM_AD2)
Causes:
Thermister trouble. PCU PWB trouble Connection trouble of the connector and the harness. Fusing unit not installed.
Remedy:
Replace the thermistor. Replace the PCU PWB. Check connection of the connector and the harness.
Code: H2-01
Description:
Thermister open trouble (TH_LM)
Causes:
Thermister trouble. PCU PWB trouble. Connection trouble of the connector and the harness. Fusing unit not installed.
Remedy:
Replace the thermistor. Replace the PCU PWB. Check connection of the connector and the harness.
Code: H2-02
Description:
Sub thermister open trouble (TH_US)
Causes:
Thermister trouble. PCU PWB trouble. Connection trouble of the connector and the harness. Fusing unit not installed.
Remedy:
Replace the thermistor. Replace the PCU PWB. Check connection of the connector and the harness.
Code: H2-03
Description:
Compensation thermister open trouble (TH_UM_AD1)
Causes:
Thermister trouble. PCU PWB trouble Connection trouble of the connector and the harness. Fusing unit not installed.
Remedy:
Replace the thermistor. Replace the PCU PWB. Check connection of the connector and the harness.
Code: H2-04
Description:
External heating thermistor open (TH_EX1)
Causes:
Thermistor trouble. PCU PWB trouble. Fusing section connector connection trouble. Power unit trouble.
Remedy:
Check the connector and the harness between the thermistor and the PCU PWB. Replace the thermistor. Replace the power unit.
Code: H2-05
Description:
External heating thermistor open (TH_EX2)
Causes:
Thermistor trouble. PCU PWB trouble. Connection trouble of the connector and the harness.
Remedy:
Replace the thermistor. Replace the PCU PWB. Check connection of the connector and the harness.
Code: H3-00
Description:
Fusing section high temperature trouble (TH_UM)
Causes:
The fusing temperature exceeds the specified level. Thermister trouble. PCU PWB trouble Connection trouble of the connector and the harness. Power unit trouble.
Remedy:
Use SIM5-2 to check the flashing operation of the heater lamp. Use SIM14 to cancel the trouble. Replace the thermistor. Replace the PCU PWB. Check connection of the connector and the harness. Replace the power unit.
Code: H3-01
Description:
Fusing section high temperature trouble (TH_LM)
Causes:
The fusing temperature exceeds the specified level. Thermister trouble. PCU PWB trouble.Harness and connector connection trouble. Power unit trouble.
Remedy:
Use SIM5-2 to check the flashing operation of the heater lamp. Use SIM14 to cancel the trouble. Replace the thermistor. Replace the PCU PWB. Check connection of the connector and the harness. Replace the power unit.
Code: H3-02
Description:
Fusing section high temperature trouble (TH_US)
Causes:
The fusing temperature exceeds the specified level. Thermister trouble. PCU PWB trouble Connection trouble of the connector and the harness. Power unit trouble.
Remedy:
Use SIM5-2 to check the flashing operation of the heater lamp. Use SIM14 to cancel the trouble. Replace the PCU PWB. Check connection of the thermistor and the harness. Replace the power unit.
Code: H3-04
Description:
Fusing section high temperature trouble (TH_EX1)
Causes:
Non-contact thermistor trouble. PCU PWB trouble. Fusing section connector connection trouble. Power unit trouble.
Remedy:
Use SIM5-2 to check the flashing operation of the heater lamp. Use SIM14 to cancel the trouble. Replace the PCU PWB. Check connection of the thermistor and the harness. Replace the power unit.
Code: H3-05
Description:
Fusing section high temperature trouble (TH_EX2)
Causes:
Thermistor trouble. PCU PWB trouble. Connection trouble of the connector and the harness.
Remedy:
Use SIM14 to cancel the trouble. Replace the thermistor. Replace the PCU PWB. Check connection of the connector and the harness.
Code: H4-00
Description:
Fusing section low temperature trouble (TH_UM_AD2)
Causes:
The fusing temperature does not reach the specified level within the specified time from turning ON the power relay. Thermister trouble. Heater lamp trouble. PCU PWB trouble. Thermostat trouble. Connector, harness connection trouble. Power unit trouble. Interlock switch trouble.
Remedy:
Replace the thermistor. Replace the heater lamp. Replace the PCU PWB. Replace the thermostat. Check connection of the connector and the harness. Replace the power unit. Replace the interlock switch. Use SIM5-2 to check the flashing operation of the heater lamp. Use SIM14 to cancel the trouble.
Code: H4-01
Description:
Fusing section low temperature trouble (TH_LM)
Causes:
The fusing temperature does not reach the specified level within the specified time from turning ON the power relay. Thermister trouble. Heater lamp trouble. PCU PWB trouble Thermostat trouble. Connector, harness connection trouble. Power unit trouble. Interlock switch trouble.
Remedy:
Replace the thermistor. Replace the heater lamp. Replace the PCU PWB. Replace the thermostat. Check connection of the connector and the harness. Replace the power unit. Replace the interlock switch. Use SIM5-2 to check the flashing operation of the heater lamp. Use SIM14 to cancel the trouble.
Code: H4-02
Description:
Fusing section low temperature trouble
(TH_US)
Causes:
The fusing temperature does not reach the specified level within the specified time from turning ON the power relay. Thermister trouble. Heater lamp trouble. PCU PWB trouble Thermostat trouble. Connector, harness connection trouble. Power unit trouble. Interlock switch trouble.
Remedy:
Replace the thermistor. Replace the heater lamp. Replace the PCU PWB. Replace the thermostat. Check connection of the connector and the harness. Replace the power unit. Replace the interlock switch. Use SIM5-2 to check the flashing operation of the heater lamp. Use SIM14 to cancel the trouble.
Code: H4-04
Description:
Fusing section low temperature trouble (TH_EX)
Causes:
Thermistor trouble. Heater lamp trouble. PCU PWB trouble. Thermostat trouble. Power unit trouble. Interlock switch trouble
Remedy:
Use SIM5-2 to check the flashing operation of the heater lamp. Use SIM14 to cancel the trouble. Replace the thermistor. Replace the heater lamp. Replace the PCU PWB. Replace the power unit. Replace the interlock switch.
Code: H4-30
Description:
Thermister input circuit trouble (TH_UM)
Causes:
The values of TH_UM_AD1 and TH_UM_AD2 do not exceed the specified value (50 counts in AD value) within the specified time from turning ON the HL_UM. Thermister trouble. Heater lamp trouble. PCU PWB trouble Thermostat trouble. Connector, harness connection trouble. Power unit trouble. Interlock switch trouble
Remedy:
Replace the thermistor. Replace the heater lamp. Replace the PCU PWB. Replace the thermostat. Check connection of the connector and the harness. Replace the power unit. Replace the interlock switch. Use SIM5-2 to check the flashing operation of the heater lamp. Use SIM14 to cancel the trouble.
Code: H5-01
Description:
5 times continuous POD1 not-reach jam
Causes:
A fusing jam is not canceled completely. (A jam paper remains.) POD1 sensor trouble. Fusing unit installation trouble. Connector, harness connection trouble. PCU PWB trouble
Remedy:
Replace the POD1 sensor. Check the installing position of the fusing unit. Replace the fusing unit. Check connection of the connector and the harness. Replace the PCU PWB. Use SIM14 to cancel the trouble.
Code: H7-10
Description:
Fusing low temperature recovery trouble (TH_UM_AD2).
Causes:
The fusing temperature does not reach the specified level within the specified time from stopping a job due to fall in the fusing temperature. Thermister trouble. Heater lamp trouble. PCU PWB trouble Thermostat trouble. Connector, harness connection trouble. Power unit trouble. Interlock switch trouble.
Remedy:
Replace the thermistor. Replace the heater lamp. Replace the PCU PWB. Replace the thermostat. Check connection of the connector and the harness. Replace the power unit. Replace the interlock switch. Use SIM5-2 to check the flashing operation of the heater lamp.
Code: H7-11
Description:
Fusing low temperature recovery trouble (TH_LM)
Causes:
The fusing temperature does not reach the specified level within the specified time from stopping a job due to fall in the fusing temperature. Thermister trouble. Heater lamp trouble. PCU PWB trouble Thermostat trouble. Connector, harness connection trouble. Power unit trouble. Interlock switch trouble.
Remedy:
Replace the thermistor. Replace the heater lamp. Replace the PCU PWB. Replace the thermostat. Check connection of the connector and the harness. Replace the power unit. Replace the interlock switch. Use SIM5-2 to check the flashing operation of the heater lamp.
Code: H7-12
Description:
Fusing low temperature recovery trouble (TH_US)
Causes:
The fusing temperature does not reach the specified level within the specified time from stopping a job due to fall in the fusing temperature. Thermister trouble. Heater lamp trouble. PCU PWB trouble Thermostat trouble. Connector, harness connection trouble. Power unit trouble. Interlock switch trouble.
Remedy:
Replace the thermistor. Replace the heater lamp. Replace the PCU PWB. Replace the thermostat. Check connection of the connector and the harness. Replace the power unit. Replace the interlock switch. Use SIM5-2 to check the flashing operation of the heater lamp.
Code: H7-14
Description:
Recovery error from low fuser temp. (TH_EX)
Causes:
The specified temperature is not reached within the specified time from job stop due to a fall in the fusing temperature. Thermistor trouble. Thermostat trouble. Heater lamp trouble. PCU PWB trouble. Power unit trouble. Interlock switch trouble. Connection trouble of the connector and the harness.
Remedy:
Replace the thermistor. Replace the thermostat. Replace the heater lamp. Replace the PCU PWB. Replace the power unit. Replace the interlock switch. Check connection of the connector and the harness. Use SIM5-2 to check the flashing operation of the heater lamp.
Code: L1-00
Description:
Scanner feed trouble
Causes:
Scanner feed is not completed within the specified time. Scanner unit trouble. SCU PWB trouble Scanner control PWB trouble. Harness and connector connection trouble. Scanner home position sensor trouble. Scanner motor trouble.
Remedy:
Use SIM1-1 to check the scan operation. Replace the scanner unit. Replace the SCU PWB. Check connection of the connectors and the harness. Replace the scanner home position sensor. Replace the scanner motor.
Code: L3-00
Description:
Scanner return trouble
Causes:
Scanner return is not completed within the specified time. Scanner unit trouble. SCU PWB trouble Scanner control PWB trouble. Harness and connector connection trouble. Scanner home position sensor trouble. Scanner motor trouble.
Remedy:
Use SIM1-1 to check the scan operation. Replace the scanner unit. Replace the SCU PWB. Check connection of the connectors and the harness. Replace the scanner home position sensor. Replace the scanner motor.
Code: L4-02
Description:
Paper feed motor trouble
Causes:
The lock signal Is not detected within 1 sec when turning ON the paper feed motor when warming up, canceling a jam. Paper feed motor trouble. Harness and connector connection trouble. PCU PWB trouble
Remedy:
Use SIM6-1 to check the operation of the paper feed motor. Replace the paper feed motor. Check connection of the connectors and the harness. Replace the PCU PWB.
Code: L4-03
Description:
Fusing motor trouble
Causes:
The motor lock signal is detected during rotation of the fusing motor. Fusing motor trouble. Connection trouble of the connector and the harness. PCU PWB trouble.
Remedy:
Use SIM6-1 to check the operation of the fusing motor. Replace the Fusing motor. Check connection of the connectors and the harness. Replace the PCU PWB.
Code: L4-04
Description:
Developing motor trouble (BLACK)
Causes:
The motor lock signal is detected during rotation of the developing motor. Developing motor trouble. Harness and connector connection trouble. PCU PWB trouble Developing unit trouble.
Remedy:
Use SIM25-1 to check the operation of the developing motor. Replace the developing motor. Check connection of the connectors and the harness. Replace the PCU PWB. Replace the developing motor. Replace the developing unit.
Code: L4-05
Description:
Developing motor trouble (COLOR)
Causes:
The motor lock signal is detected during rotation of the developing motor. Developing motor trouble. Harness and connector connection trouble. PCU PWB trouble Developing unit trouble.
Remedy:
Use SIM25-1 to check the operation of the developing motor. Replace the developing motor. Check connection of the connectors and the harness. Replace the PCU PWB. Replace the developing motor. Replace the developing unit.
Code: L4-06
Description:
Transfer unit lift trouble
When separating the primary transfer belt unit, change in the separation position sensor characteristics is not detected within the specified time.
Causes:
Transfer unit position sensor trouble. PCU PWB trouble. Connection trouble of the connector and the harness. Transfer unit separation clutch operation trouble. Primary transfer belt unit is not installed.
Remedy:
Use SIM6-3 to check the separating operation of the transfer unit. Install the primary transfer belt unit. Replace the transfer unit position sensor. Replace the PCU PWB. Check connection of the connector and the harness. Replace the transfer unit separation clutch.
Code: L4-11
Description:
Shift motor trouble
Causes:
No change in the shifter home position sensor signal is detected in the operation of the shifter initializing. Shift motor trouble. PCU PWB trouble. Connection trouble of the connector and the harness. Shifter home position sensor trouble.
Remedy:
Use SIM6-1 to check the shift operation. Use SIM30-1 to check the operation of the shifter home position sensor. Replace the shift motor. Replace the PCU PWB. Check connection of the connector and the harness. Replace the shifter home position sensor.
Code: L4-16
Description:
Fusing pressure release trouble
Causes:
No change in the fusing pressure release sensor signal is detected within the specified time after turning ON the fusing pressure release motor. Fusing pressure release sensor trouble. Fusing pressure release motor trouble. Fusing pressure release level F, R trouble. PCU PWB trouble. Connection trouble of the connector and the harness.
Remedy:
Replace the fusing pressure release sensor. Replace the fusing pressure release motor. Replace the fusing pressure release lever F, R. Replace the PCU PWB. Check connection of the connector and the harness.
Code: L4-30
Description:
MFP fan motor trouble
Causes:
Fan motor trouble. MFP PWB trouble.Harness and connector connection trouble. PCU PWB trouble
Remedy:
Use SIM6-2 to check the operation of the fan motor. Replace the fan motor. Replace the MFP PWB. Check connection of the connector and the harness. Replace the PCU PWB.
Code: L4-31
Description:
Paper exit cooling fan trouble
Causes:
The fan operation signal is not detected within the specified time in the paper exit cooling fan operation. Paper exit cooling fan trouble. PCU PWB trouble Connection trouble of the connector and the harness.
Remedy:
Check connection of the connectors and the harness. Use SIM6-2 to check the rotating operation of the fan. Replace the paper exit cooling fan. Replace the PCU PWB.
Code: L4-32
Description:
Power source cooling fan trouble
Causes:
The fan operation signal is not detected within the specified time in the power cooling fan operation. Power cooling fan trouble. PCU PWB trouble. Connection trouble of the connector and the harness.
Remedy:
Use SIM6-2 to check the rotating operation of the fan. Replace the power cooling fan. Replace the PCU PWB. Check/replace the connector or the harness.
Description:
Main unit - Finisher combination error
Causes:
The finisher which is not supported by the main unit model is installed. Finisher control PWB trouble.
Remedy:
Install a proper finisher. Replace the finisher control PWB.
Code: F2-22
Description:
Discharge lamp trouble (K)
A trouble is detected when the discharge lamp open sensor is open for 1 sec after turning ON the discharge lamp.
Causes:
Contact trouble between the discharge lamp PWB (K) and the PCU PWB. Discharge lamp PWB (K) trouble. PCU PWB trouble.
Remedy:
Replace the discharge lamp PWB (K). Check the harness and the connector. Replace the PCU PWB.
Code: F2-23
Description:
Discharge lamp trouble (C)
A trouble is detected when the discharge lamp open sensor is open for 1 sec after turning ON the discharge lamp.
Causes:
Contact trouble between the discharge lamp PWB (C) and the PCU PWB. Discharge lamp PWB (C) trouble. PCU PWB trouble.
Remedy:
Replace the discharge lamp PWB (C). Check the harness and the connector. Replace the PCU PWB.
Code: F2-24
Description:
Discharge lamp trouble (M)
A trouble is detected when the discharge lamp open sensor is open for 1 sec after turning ON the discharge lamp.
Causes:
Contact trouble between the discharge lamp PWB (M) and the PCU PWB. Discharge lamp PWB (M) trouble. PCU PWB trouble.
Remedy:
Replace the discharge lamp PWB (M). Check the harness and the connector. Replace the PCU PWB.
Code: F2-25
Description:
Discharge lamp trouble (Y)
A trouble is detected when the discharge lamp open sensor is open for 1 sec after turning ON the discharge lamp.
Causes:
Contact trouble between the discharge lamp PWB (Y) and the PCU PWB. Discharge lamp PWB (Y) trouble. PCU PWB trouble.
Remedy:
Replace the discharge lamp PWB (Y). Check the harness and the connector. Replace the PCU PWB.
Code: F2-39
Description:
Process thermister trouble
Causes:
Process thermister trouble. Process thermister harness connection trouble. PCU PWB trouble
Remedy:
Replace the process thermistor. Check connection of the harness and the connector. Replace the PCU PWB.
Code: F2-40
Description:
Toner density sensor trouble (BLACK)
Causes:
Toner density sensor output abnormality (Sample level 25 or less, or 231 or above) Connection trouble of the connector and the harness. Developing unit trouble. PCU PWB trouble
Remedy:
Replace the toner density sensor. Check connection of the connector and the harness. Replace the developing unit. Replace the PCU PWB.
Code: F2-41
Description:
Toner density sensor trouble (CYAN)
Causes:
Toner density sensor output abnormality (Sample level 25 or less, or 231 or above) Connection trouble of the connector and the harness. Developing unit trouble. PCU PWB trouble
Remedy:
Replace the toner density sensor. Check connection of the connector and the harness. Replace the developing unit. Replace the PCU PWB.
Code: F2-42
Description:
Toner density sensor trouble (MAGENTA)
Causes:
Toner density sensor output abnormality (Sample level 25 or less, or 231 or above) Connection trouble of the connector and the harness. Developing unit trouble. PCU PWB trouble
Remedy:
Replace the toner density sensor. Check connection of the connector and the harness. Replace the developing unit. Replace the PCU PWB.
Code: F2-43
Description:
Toner density sensor trouble (YELLOW)
Causes:
Toner density sensor output abnormality (Sample level 25 or less, or 231 or above). Connection trouble of the connector and the harness. Developing unit trouble. PCU PWB trouble.
Remedy:
Replace the toner density sensor. Check connection of the connector and the harness. Replace the developing unit. Replace the PCU PWB.
Code: F2-45
Description:
Color image density sensor trouble
Causes:
Color image density sensor sensitivity adjustment trouble. Color image density sensor trouble. Harness and connector connection trouble. Image density sensor dirt. Calibration plate dirt. Calibration plate solenoid trouble. PCU PWB trouble.
Remedy:
Replace the color image density sensor. Check connection of the connectors and the harness. Clean the image density sensor. Replace the calibration plate. Replace the calibration plate solenoid. Replace the PCU PWB. Use SIM44-2 to adjust the process control sensor sensitivity.
Code: F2-49
Description:
LSU thermister trouble
Causes:
The LSU detection temperature is outside of -28C - 78C. LSU thermister trouble. Harness and connector connection trouble. PCU PWB trouble LSU control PWB trouble.
Remedy:
Replace the LSU thermistor. Check connection of the connectors and the harness. Replace the PCU PWB. Replace the LSU control PWB. Replace the LSU.
Code: F2-50
Description:
K drum phase sensor trouble
Causes:
Drum phase sensor trouble. Harness and connector connection trouble. Drum drive section trouble. PCU PWB trouble
Remedy:
Use SIM30-1 to check the operation of "DhpD_K.". Replace the drum phase sensor. Check connection of the connectors and the harness. Repair the drum drive section. Replace the PCU PWB.
Code: F2-51
Description:
CL drum phase sensor trouble (41-sheet machine) CL drum phase sensor trouble (CYAN) (50-sheet machine)
Causes:
Drum phase sensor trouble. Harness and connector connection trouble. Drum drive section trouble.
PCU PWB trouble.
Remedy:
Use SIM30-1 to check the operation of "DhpD_CL". Replace the drum phase sensor. Check connection of the connectors and the harness. Repair the drum drive section. Replace the PCU PWB.
Code: F2-52
Description:
CL drum phase sensor trouble (MAGENTA) (50-sheet machine)
Causes:
Drum phase sensor trouble. Harness and connector connection trouble. Drum drive section trouble. PCU PWB trouble.
Remedy:
Use SIM30-1 to check the operation of "DhpD_CL". Replace the drum phase sensor. Check connection of the connectors and the harness. Repair the drum drive section. Replace the PCU PWB.
Code: F2-53
Description:
CL drum phase sensor trouble (YELLOW) (50-sheet machine)
Causes:
Drum phase sensor trouble. Harness and connector connection trouble. Drum drive section trouble. PCU PWB trouble.
Remedy:
Use SIM30-1 to check the operation of "DhpD_CL". Replace the drum phase sensor. Check connection of the connectors and the harness. Repair the drum drive section. Replace the PCU PWB.
Code: F2-58
Description:
Process humidity sensor trouble
Causes:
Process humidity sensor trouble. Harness and connector connection trouble. PCU PWB trouble.
Remedy:
Replace the process humidity sensor. Check connection of the connectors and the harness. Replace the PCU PWB.
Code: F2-64
Description:
Toner supply operation trouble (BK)
Causes:
Toner motor trouble. Toner density sensor trouble. Connector/harness trouble. PCU PWB trouble. Toner cartridge trouble. Developing unit trouble.
Remedy:
Replace the toner motor. Replace the toner density sensor. Connector/harness trouble. Replace the PCU PWB. Replace the toner cartridge. Replace the developing unit.
Code: F2-65
Description:
Toner supply operation trouble (C)
Causes:
Toner motor trouble. Toner density sensor trouble. Connector/harness trouble. PCU PWB trouble Toner cartridge trouble. Developing unit trouble.
Remedy:
Replace the toner motor. Replace the toner density sensor. Connector/harness trouble. Replace the PCU PWB. Replace the toner cartridge. Replace the developing unit.
Code: F2-66
Description:
Toner supply operation trouble (M)
Causes:
Toner motor trouble. Toner density sensor trouble. Connector/harness trouble. PCU PWB trouble Toner cartridge trouble. Developing unit trouble.
Remedy:
Replace the toner motor. Replace the toner density sensor. Connector/harness trouble. Replace the PCU PWB. Replace the toner cartridge. Replace the developing unit.
Code: F2-67
Description:
Toner supply operation trouble (Y)
Causes:
Toner motor trouble. Toner density sensor trouble. Connector/harness trouble. PCU PWB trouble Toner cartridge trouble. Developing unit trouble.
Remedy:
Replace the toner motor. Replace the toner density sensor. Connector/harness trouble. Replace the PCU PWB. Replace the toner cartridge. Replace the developing unit.
Code: F2-70
Description:
Improper toner cartridge detection (BLACK)
Causes:
An improper toner cartridge is inserted. (The main unit detects a toner cartridge of a different specification.) Toner cartridge trouble. PCU PWB trouble
Remedy:
Replace the toner cartridge. Replace the PCU PWB.
Code: F2-71
Description:
Improper toner cartridge detection (CYAN)
Causes:
An improper toner cartridge is inserted. (The main unit detects a toner cartridge of a different specification.) Toner cartridge trouble. PCU PWB trouble.
Remedy:
Replace the toner cartridge. Replace the PCU PWB.
Code: F2-72
Description:
Improper toner cartridge detection (MAGENTA)
Causes:
An improper toner cartridge is inserted. (The main unit detects a toner cartridge of a different specification.) Toner cartridge trouble. PCU PWB trouble.
Remedy:
Replace the toner cartridge. Replace the PCU PWB.
Code: F2-73
Description:
Improper toner cartridge detection (YELLOW)
Causes:
An improper toner cartridge is inserted. (The main unit detects a toner cartridge of a different specification.) Toner cartridge trouble. PCU PWB trouble.
Remedy:
Replace the toner cartridge. Replace the PCU PWB.
Code: F2-74
Description:
CRUM error (BLACK)
Causes:
Toner cartridge (CRUM) trouble. PCU PWB trouble. Connector/harness trouble.
Remedy:
Replace the toner cartridge. Replace the PCU PWB. Connector/harness trouble.
Code: F2-75
Description:
CRUM error (CYAN)
Causes:
Toner cartridge (CRUM) trouble. PCU PWB trouble. Connector/harness trouble.
Remedy:
Replace the toner cartridge. Replace the PCU PWB. Connector/harness trouble.
Code: F2-76
Description:
CRUM error (MAGENTA)
Causes:
Toner cartridge (CRUM) trouble. PCU PWB trouble. Connector/harness trouble.
Remedy:
Replace the toner cartridge. Replace the PCU PWB. Connector/harness trouble.
Code: F2-77
Description:
CRUM error (YELLOW)
Causes:
Toner cartridge (CRUM) trouble. PCU PWB trouble. Connector/harness trouble.
Remedy:
Replace the toner cartridge. Replace the PCU PWB. Connector/harness trouble.
Code: F2-78
Description:
Registration image density sensor trouble (Transfer belt substrate reflection rate abnormality)
Causes:
Image density (registration) sensor trouble (Sensor sensitivity adjustment trouble). PCU PWB trouble. Connection trouble of the connector and the harness. Image density (registration) sensor dirt. Transfer belt dirt, scratch.
Remedy:
Replace the image density (registration) sensor. Replace the PCU PWB. Check connection of the connector and the harness. Clean the image density (registration) sensor. Clean or replace the transfer belt.
Code: F3-12
Description:
Paper feed tray 1 lift operation trouble
Causes:
LUD1 is not turned ON within the specified time. CLUD1 sensor trouble Paper feed tray 1 lift unit trouble. PCU PWB trouble. Harness and connector connection trouble.
Remedy:
Check connection of the harness and the connector of LUD1. Replace the lift-up unit. Replace the PCU PWB.
Code: F3-22
Description:
Paper feed tray 2 lift operation trouble
LUD2 does not turn ON within the specified time
Causes:
LUD2 does not turn ON within the specified time. CLUD2 sensor trouble. Paper feed tray 2 lift unit trouble. PCU PWB trouble. Harness and connector connection trouble.
Remedy:
Check the harness and the connector of LUD2. Replace the lift-up unit. Replace the PCU PWB.
Code: H2-00
Description:
Thermister open trouble (TH_UM_AD2)
Causes:
Thermister trouble. PCU PWB trouble Connection trouble of the connector and the harness. Fusing unit not installed.
Remedy:
Replace the thermistor. Replace the PCU PWB. Check connection of the connector and the harness.
Code: H2-01
Description:
Thermister open trouble (TH_LM)
Causes:
Thermister trouble. PCU PWB trouble. Connection trouble of the connector and the harness. Fusing unit not installed.
Remedy:
Replace the thermistor. Replace the PCU PWB. Check connection of the connector and the harness.
Code: H2-02
Description:
Sub thermister open trouble (TH_US)
Causes:
Thermister trouble. PCU PWB trouble. Connection trouble of the connector and the harness. Fusing unit not installed.
Remedy:
Replace the thermistor. Replace the PCU PWB. Check connection of the connector and the harness.
Code: H2-03
Description:
Compensation thermister open trouble (TH_UM_AD1)
Causes:
Thermister trouble. PCU PWB trouble Connection trouble of the connector and the harness. Fusing unit not installed.
Remedy:
Replace the thermistor. Replace the PCU PWB. Check connection of the connector and the harness.
Code: H2-04
Description:
External heating thermistor open (TH_EX1)
Causes:
Thermistor trouble. PCU PWB trouble. Fusing section connector connection trouble. Power unit trouble.
Remedy:
Check the connector and the harness between the thermistor and the PCU PWB. Replace the thermistor. Replace the power unit.
Code: H2-05
Description:
External heating thermistor open (TH_EX2)
Causes:
Thermistor trouble. PCU PWB trouble. Connection trouble of the connector and the harness.
Remedy:
Replace the thermistor. Replace the PCU PWB. Check connection of the connector and the harness.
Code: H3-00
Description:
Fusing section high temperature trouble (TH_UM)
Causes:
The fusing temperature exceeds the specified level. Thermister trouble. PCU PWB trouble Connection trouble of the connector and the harness. Power unit trouble.
Remedy:
Use SIM5-2 to check the flashing operation of the heater lamp. Use SIM14 to cancel the trouble. Replace the thermistor. Replace the PCU PWB. Check connection of the connector and the harness. Replace the power unit.
Code: H3-01
Description:
Fusing section high temperature trouble (TH_LM)
Causes:
The fusing temperature exceeds the specified level. Thermister trouble. PCU PWB trouble.Harness and connector connection trouble. Power unit trouble.
Remedy:
Use SIM5-2 to check the flashing operation of the heater lamp. Use SIM14 to cancel the trouble. Replace the thermistor. Replace the PCU PWB. Check connection of the connector and the harness. Replace the power unit.
Code: H3-02
Description:
Fusing section high temperature trouble (TH_US)
Causes:
The fusing temperature exceeds the specified level. Thermister trouble. PCU PWB trouble Connection trouble of the connector and the harness. Power unit trouble.
Remedy:
Use SIM5-2 to check the flashing operation of the heater lamp. Use SIM14 to cancel the trouble. Replace the PCU PWB. Check connection of the thermistor and the harness. Replace the power unit.
Code: H3-04
Description:
Fusing section high temperature trouble (TH_EX1)
Causes:
Non-contact thermistor trouble. PCU PWB trouble. Fusing section connector connection trouble. Power unit trouble.
Remedy:
Use SIM5-2 to check the flashing operation of the heater lamp. Use SIM14 to cancel the trouble. Replace the PCU PWB. Check connection of the thermistor and the harness. Replace the power unit.
Code: H3-05
Description:
Fusing section high temperature trouble (TH_EX2)
Causes:
Thermistor trouble. PCU PWB trouble. Connection trouble of the connector and the harness.
Remedy:
Use SIM14 to cancel the trouble. Replace the thermistor. Replace the PCU PWB. Check connection of the connector and the harness.
Code: H4-00
Description:
Fusing section low temperature trouble (TH_UM_AD2)
Causes:
The fusing temperature does not reach the specified level within the specified time from turning ON the power relay. Thermister trouble. Heater lamp trouble. PCU PWB trouble. Thermostat trouble. Connector, harness connection trouble. Power unit trouble. Interlock switch trouble.
Remedy:
Replace the thermistor. Replace the heater lamp. Replace the PCU PWB. Replace the thermostat. Check connection of the connector and the harness. Replace the power unit. Replace the interlock switch. Use SIM5-2 to check the flashing operation of the heater lamp. Use SIM14 to cancel the trouble.
Code: H4-01
Description:
Fusing section low temperature trouble (TH_LM)
Causes:
The fusing temperature does not reach the specified level within the specified time from turning ON the power relay. Thermister trouble. Heater lamp trouble. PCU PWB trouble Thermostat trouble. Connector, harness connection trouble. Power unit trouble. Interlock switch trouble.
Remedy:
Replace the thermistor. Replace the heater lamp. Replace the PCU PWB. Replace the thermostat. Check connection of the connector and the harness. Replace the power unit. Replace the interlock switch. Use SIM5-2 to check the flashing operation of the heater lamp. Use SIM14 to cancel the trouble.
Code: H4-02
Description:
Fusing section low temperature trouble
(TH_US)
Causes:
The fusing temperature does not reach the specified level within the specified time from turning ON the power relay. Thermister trouble. Heater lamp trouble. PCU PWB trouble Thermostat trouble. Connector, harness connection trouble. Power unit trouble. Interlock switch trouble.
Remedy:
Replace the thermistor. Replace the heater lamp. Replace the PCU PWB. Replace the thermostat. Check connection of the connector and the harness. Replace the power unit. Replace the interlock switch. Use SIM5-2 to check the flashing operation of the heater lamp. Use SIM14 to cancel the trouble.
Code: H4-04
Description:
Fusing section low temperature trouble (TH_EX)
Causes:
Thermistor trouble. Heater lamp trouble. PCU PWB trouble. Thermostat trouble. Power unit trouble. Interlock switch trouble
Remedy:
Use SIM5-2 to check the flashing operation of the heater lamp. Use SIM14 to cancel the trouble. Replace the thermistor. Replace the heater lamp. Replace the PCU PWB. Replace the power unit. Replace the interlock switch.
Code: H4-30
Description:
Thermister input circuit trouble (TH_UM)
Causes:
The values of TH_UM_AD1 and TH_UM_AD2 do not exceed the specified value (50 counts in AD value) within the specified time from turning ON the HL_UM. Thermister trouble. Heater lamp trouble. PCU PWB trouble Thermostat trouble. Connector, harness connection trouble. Power unit trouble. Interlock switch trouble
Remedy:
Replace the thermistor. Replace the heater lamp. Replace the PCU PWB. Replace the thermostat. Check connection of the connector and the harness. Replace the power unit. Replace the interlock switch. Use SIM5-2 to check the flashing operation of the heater lamp. Use SIM14 to cancel the trouble.
Code: H5-01
Description:
5 times continuous POD1 not-reach jam
Causes:
A fusing jam is not canceled completely. (A jam paper remains.) POD1 sensor trouble. Fusing unit installation trouble. Connector, harness connection trouble. PCU PWB trouble
Remedy:
Replace the POD1 sensor. Check the installing position of the fusing unit. Replace the fusing unit. Check connection of the connector and the harness. Replace the PCU PWB. Use SIM14 to cancel the trouble.
Code: H7-10
Description:
Fusing low temperature recovery trouble (TH_UM_AD2).
Causes:
The fusing temperature does not reach the specified level within the specified time from stopping a job due to fall in the fusing temperature. Thermister trouble. Heater lamp trouble. PCU PWB trouble Thermostat trouble. Connector, harness connection trouble. Power unit trouble. Interlock switch trouble.
Remedy:
Replace the thermistor. Replace the heater lamp. Replace the PCU PWB. Replace the thermostat. Check connection of the connector and the harness. Replace the power unit. Replace the interlock switch. Use SIM5-2 to check the flashing operation of the heater lamp.
Code: H7-11
Description:
Fusing low temperature recovery trouble (TH_LM)
Causes:
The fusing temperature does not reach the specified level within the specified time from stopping a job due to fall in the fusing temperature. Thermister trouble. Heater lamp trouble. PCU PWB trouble Thermostat trouble. Connector, harness connection trouble. Power unit trouble. Interlock switch trouble.
Remedy:
Replace the thermistor. Replace the heater lamp. Replace the PCU PWB. Replace the thermostat. Check connection of the connector and the harness. Replace the power unit. Replace the interlock switch. Use SIM5-2 to check the flashing operation of the heater lamp.
Code: H7-12
Description:
Fusing low temperature recovery trouble (TH_US)
Causes:
The fusing temperature does not reach the specified level within the specified time from stopping a job due to fall in the fusing temperature. Thermister trouble. Heater lamp trouble. PCU PWB trouble Thermostat trouble. Connector, harness connection trouble. Power unit trouble. Interlock switch trouble.
Remedy:
Replace the thermistor. Replace the heater lamp. Replace the PCU PWB. Replace the thermostat. Check connection of the connector and the harness. Replace the power unit. Replace the interlock switch. Use SIM5-2 to check the flashing operation of the heater lamp.
Code: H7-14
Description:
Recovery error from low fuser temp. (TH_EX)
Causes:
The specified temperature is not reached within the specified time from job stop due to a fall in the fusing temperature. Thermistor trouble. Thermostat trouble. Heater lamp trouble. PCU PWB trouble. Power unit trouble. Interlock switch trouble. Connection trouble of the connector and the harness.
Remedy:
Replace the thermistor. Replace the thermostat. Replace the heater lamp. Replace the PCU PWB. Replace the power unit. Replace the interlock switch. Check connection of the connector and the harness. Use SIM5-2 to check the flashing operation of the heater lamp.
Code: L1-00
Description:
Scanner feed trouble
Causes:
Scanner feed is not completed within the specified time. Scanner unit trouble. SCU PWB trouble Scanner control PWB trouble. Harness and connector connection trouble. Scanner home position sensor trouble. Scanner motor trouble.
Remedy:
Use SIM1-1 to check the scan operation. Replace the scanner unit. Replace the SCU PWB. Check connection of the connectors and the harness. Replace the scanner home position sensor. Replace the scanner motor.
Code: L3-00
Description:
Scanner return trouble
Causes:
Scanner return is not completed within the specified time. Scanner unit trouble. SCU PWB trouble Scanner control PWB trouble. Harness and connector connection trouble. Scanner home position sensor trouble. Scanner motor trouble.
Remedy:
Use SIM1-1 to check the scan operation. Replace the scanner unit. Replace the SCU PWB. Check connection of the connectors and the harness. Replace the scanner home position sensor. Replace the scanner motor.
Code: L4-02
Description:
Paper feed motor trouble
Causes:
The lock signal Is not detected within 1 sec when turning ON the paper feed motor when warming up, canceling a jam. Paper feed motor trouble. Harness and connector connection trouble. PCU PWB trouble
Remedy:
Use SIM6-1 to check the operation of the paper feed motor. Replace the paper feed motor. Check connection of the connectors and the harness. Replace the PCU PWB.
Code: L4-03
Description:
Fusing motor trouble
Causes:
The motor lock signal is detected during rotation of the fusing motor. Fusing motor trouble. Connection trouble of the connector and the harness. PCU PWB trouble.
Remedy:
Use SIM6-1 to check the operation of the fusing motor. Replace the Fusing motor. Check connection of the connectors and the harness. Replace the PCU PWB.
Code: L4-04
Description:
Developing motor trouble (BLACK)
Causes:
The motor lock signal is detected during rotation of the developing motor. Developing motor trouble. Harness and connector connection trouble. PCU PWB trouble Developing unit trouble.
Remedy:
Use SIM25-1 to check the operation of the developing motor. Replace the developing motor. Check connection of the connectors and the harness. Replace the PCU PWB. Replace the developing motor. Replace the developing unit.
Code: L4-05
Description:
Developing motor trouble (COLOR)
Causes:
The motor lock signal is detected during rotation of the developing motor. Developing motor trouble. Harness and connector connection trouble. PCU PWB trouble Developing unit trouble.
Remedy:
Use SIM25-1 to check the operation of the developing motor. Replace the developing motor. Check connection of the connectors and the harness. Replace the PCU PWB. Replace the developing motor. Replace the developing unit.
Code: L4-06
Description:
Transfer unit lift trouble
When separating the primary transfer belt unit, change in the separation position sensor characteristics is not detected within the specified time.
Causes:
Transfer unit position sensor trouble. PCU PWB trouble. Connection trouble of the connector and the harness. Transfer unit separation clutch operation trouble. Primary transfer belt unit is not installed.
Remedy:
Use SIM6-3 to check the separating operation of the transfer unit. Install the primary transfer belt unit. Replace the transfer unit position sensor. Replace the PCU PWB. Check connection of the connector and the harness. Replace the transfer unit separation clutch.
Code: L4-11
Description:
Shift motor trouble
Causes:
No change in the shifter home position sensor signal is detected in the operation of the shifter initializing. Shift motor trouble. PCU PWB trouble. Connection trouble of the connector and the harness. Shifter home position sensor trouble.
Remedy:
Use SIM6-1 to check the shift operation. Use SIM30-1 to check the operation of the shifter home position sensor. Replace the shift motor. Replace the PCU PWB. Check connection of the connector and the harness. Replace the shifter home position sensor.
Code: L4-16
Description:
Fusing pressure release trouble
Causes:
No change in the fusing pressure release sensor signal is detected within the specified time after turning ON the fusing pressure release motor. Fusing pressure release sensor trouble. Fusing pressure release motor trouble. Fusing pressure release level F, R trouble. PCU PWB trouble. Connection trouble of the connector and the harness.
Remedy:
Replace the fusing pressure release sensor. Replace the fusing pressure release motor. Replace the fusing pressure release lever F, R. Replace the PCU PWB. Check connection of the connector and the harness.
Code: L4-30
Description:
MFP fan motor trouble
Causes:
Fan motor trouble. MFP PWB trouble.Harness and connector connection trouble. PCU PWB trouble
Remedy:
Use SIM6-2 to check the operation of the fan motor. Replace the fan motor. Replace the MFP PWB. Check connection of the connector and the harness. Replace the PCU PWB.
Code: L4-31
Description:
Paper exit cooling fan trouble
Causes:
The fan operation signal is not detected within the specified time in the paper exit cooling fan operation. Paper exit cooling fan trouble. PCU PWB trouble Connection trouble of the connector and the harness.
Remedy:
Check connection of the connectors and the harness. Use SIM6-2 to check the rotating operation of the fan. Replace the paper exit cooling fan. Replace the PCU PWB.
Code: L4-32
Description:
Power source cooling fan trouble
Causes:
The fan operation signal is not detected within the specified time in the power cooling fan operation. Power cooling fan trouble. PCU PWB trouble. Connection trouble of the connector and the harness.
Remedy:
Use SIM6-2 to check the rotating operation of the fan. Replace the power cooling fan. Replace the PCU PWB. Check/replace the connector or the harness.
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