• Code: H3-10
• Description: Main heater lamp abnormally high temperature soft detection trouble
  A/D value the fusing main heater lamp thermistor causes abnormally high temperature (over 230°C).
• Causes: Main heater lamp thermistor defect Control PWB failure Fusing section connector contact failure
• Remedy: Check the main heater lamp blinking with SIM 5-2-1. When the lamp blinks normally: Check the thermistor and the harness. Check the MCU PWB thermistor input circuit. If lamp lights and stays lit: Check the power circuit and the lamp control circuit on MCU PWB. Clear the display of self-diagnostics with SIM 14.

• Code: H3-11
• Description: Sub heater lamp abnormally high temperature soft detection trouble
  A/D value the fusing sub heater lamp thermistor causes abnormally high temperature (over 230°C).
• Causes: Sub heater lamp thermistor defect Control PWB failure Fusing section connector contact failure
• Remedy: Check the sub heater lamp blinking with SIM 5-2-2. When the lamp blinks normally: Check the thermistor and the harness. Check the MCU PWB thermistor input circuit. If lamp lights and stays lit: Check the power circuit and the lamp control circuit on MCU PWB. Clear the display of self-diagnostics with SIM 14.

• Code: H4-00
• Description: Main heater lamp abnormally low temperature detection
  The setup temperature (about 90°C) is not reached within the specified time (about 17sec) from turning on the power ON SW. (When the temperature of main heater lamp thermistor falls below 140°C in the standby mode or printing.) Whether temperature of main heater lamp thermistor falls below 50°C in the pre-heat mode.
• Causes: Main heater lamp thermistor defect Main heater lamp failure Main thermostat failure Control PWB failure
• Remedy: Check the heater lamp blinking with SIM 5- 2. When the lamp blinks normally: Check the thermistor and the harness. Check the MCU PWB thermistor input circuit. If lamp lights and stays lit: Check for disconnection of the heater lamp and thermostat. Check the interlock switch. Check the power circuit and the lamp control circuit on MCU PWB. Clear the display of self-diagnostics with SIM 14.

• Code: H4-01
• Description: Sub heater lamp abnormally low temperature detection
  The setup temperature (about 90°C) is not reached within the specified time (about 17sec) from turning on the power ON SW. (When the temperature of sub heater thermistor falls below 140°C in the standby mode or printing.) Whether temperature of sub heater lamp thermistor falls below 50°C in the pre-heat mode.
• Causes: Sub heater lamp thermistor defect Sub heater lamp failure Sub thermostat failure Control PWB failure
• Remedy: Check the sub heater lamp blinking with SIM 5-2-2. When the lamp blinks normally: Check the thermistor and the harness. Check the MCU PWB thermistor input circuit. If lamp lights and stays lit: Check the power circuit and the lamp control circuit on MCU PWB. Clear the display of self-diagnostics with SIM 14.

• Code: H4-20
• Description: Main heater lamp abnormally low temperature detection
  The setup temperature (about 25°C: Sim 43-1-1) is not reached within the specified time (about 32sec) from turning on the power ON SW. (When the temperature falls below 140°C in the standby mode.)
• Causes: Main heater thermistor defect Main heater lamp failure Main thermostat failure Control PWB failure
• Remedy: Check the main heater lamp blinking with SIM 5-1. When the lamp blinks normally: Check the thermistor and the harness. Check the MCU PWB thermistor input circuit. If lamp lights and stays lit: Check the power circuit and the lamp control circuit on MCU PWB. Clear the display of self-diagnostics with SIM 14. Check that there is no foreign material in the contact section between the thermistor and the heat roller.

• Code: H4-21
• Description: Sub heater lamp abnormally low temperature detection
  The setup temperature (about 25°C: Sim 43-1-1) is not reached within the specified time (about 32sec) from turning on the power ON SW. (When the temperature falls below 140°C in the standby mode.)
• Causes: Sub heater thermistor defect Sub heater lamp failure Sub thermostat failure Control PWB failure
• Remedy: Check the sub heater lamp blinking with SIM 5-2-2. When the lamp blinks normally: Check the thermistor and the harness. Check the MCU PWB thermistor input circuit. If lamp lights and stays lit: Check the power circuit and the lamp control circuit on MCU PWB. Clear the display of self-diagnostics with SIM 14. Check that there is no foreign material in the contact section between the thermistor and the heat roller.

• Code: H5-01
• Description: 10 continuous POD1, POD2 or PPD2 JAM
  POD1, POD2, PPD2 JAM was detected 10 continuous times from turning on the power ON.
• Causes: The fusing JAM is not completely removed. (Jam paper remains.) POD1, POD2, PPD2 sensor breakdown or harness connection trouble Fusing unit installation failure
• Remedy: Check for jam paper in the fusing section. (paper winding, etc.) Check fusing unit installation. Check the POD1, POD2 or PPD2 sensor. Clear the trouble with SIM 14.

• Code: L1-00
• Description: Scanner feed trouble
  Scanner feed is not completed within the specified time.
• Causes: Mirror unit defect Scanner wire disconnection Origin detection sensor error Mirror motor harness abnormality
• Remedy: Check the scanning operation with SIM 1- 1. When the mirror not feeds: Check for disconnection of the scanner wire. Check the harness and connector between the mirror motor and the MCU PWB. Replace the mirror unit. Replace the MCU PWB. When the mirror feeds: Check the mirror home position sensor with SiM 1-2.