• Code: F2-05
• Description: CRUM chip communication error
• Causes: CRUM chip failure. Developing unit contact trouble. MCU PWB failure.
• Remedy: Check installation of the developing unit. Replace the MCU PWB.

• Code: F2-58
• Description: Temperature humidity sensor abnormality
  Temperature humidity sensor abnormality
• Causes: Temperature humidity sensor connector disconnection. Short-circuit of the temperature humidity sensor was detected.
• Remedy: Check the connection of temperature humidity sensor. Replace the temperature humidity sensor.

• Code: F5-02
• Description: Copy lamp (xenon lamp) error
  The copy lamp does not light up
• Causes: Copy lamp abnormality. Copy lamp harness abnormality. CCD PWB harness abnormality.
• Remedy: Check the copy lamp. (SIM 5-3) When the lamp lights: Check the harnesses and connectors between the CCD unit and the MCU PWB. When the lamp does not light: Check the harness and connector between the copy lamp and the MCU PWB. Replace the copy lamp unit. Replace the MCU PWB.

• Code: F6-00
• Description: FAX control PWB communication trouble
  Communication trouble between MCU and FAX control PWB
• Causes: FAX control PWB connector disconnection. Harness trouble between FAX control PWB and MCU PWB. Motherboard connector pin breakage. FAX control PWB ROM defect/Data failure.
• Remedy: Check the connectors and the harness of FAX control PWB and MCU PWB. Check the grounding of the copier. Check FAX control PWB ROM.

• Code: F6-10
• Description: FAX control PWB trouble
  FAX control PWB abnormality
• Causes: FAX control PWB defect
• Remedy: Replate the FAX control PWB

• Code: F6-80
• Description: FAX control PWB communication trouble (Protocol)
  Communication trouble between MCU and FAX control PWB (Protocol error)
• Causes: FAX control PWB connector disconnection Harness trouble between FAX control PWB and MCU PWB. Motherboard connector pin breakage. FAX control PWB ROM defect/Data failure.
• Remedy: Check the connectors and the harness of FAX control PWB and MCU PWB. Check the grounding of the copier. Check FAX control PWB ROM.

• Code: F6-81
• Description: FAX control PWB communication trouble (Parity)
  Communication trouble between MCU and FAX control PWB (Parity error)
• Causes: FAX control PWB connector disconnection Harness trouble between FAX control PWB and MCU PWB. Motherboard connector pin breakage. FAX control PWB ROM defect/Data failure.
• Remedy: Check the connectors and the harness of FAX control PWB and MCU PWB. Check the grounding of the copier. Check FAX control PWB ROM.

• Code: F6-82
• Description: FAX control PWB communication trouble (Overrun)
  Communication trouble between MCU and FAX control PWB (Overrun error)
• Causes: FAX control PWB connector disconnection. Harness trouble between FAX control PWB and MCU PWB. Motherboard connector pin breakage. FAX control PWB ROM defect/Data failure.
• Remedy: Check the connectors and the harness of FAX control PWB and MCU PWB. Check the grounding of the copier. Check FAX control PWB ROM.