• Code: F6 84
• Description: Communication trouble between MCU and FAX control PWB (Framing error)
• Causes: FAX control PWB connector disconnection Defective harness between FAX control PWB and MCU PWB Motherboard connector pin breakage FAX control PWB ROM error/Data error
• Remedy: Check connector/harness of FAX control PWB and MCU PWB. Check the grounding of the copier. Check FAX control PWB ROM.

• Code: F6 88
• Description: Communication trouble between MCU and FAX control PWB (Timeout error)
• Causes: FAX control PWB connector disconnection Defective harness between FAX control PWB and MCU PWB Motherboard connector pin breakage FAX control PWB ROM error/Data error
• Remedy: Check connector/harness of FAX control PWB and MCU PWB. Check the grounding of the copier. Check FAX control PWB ROM.

• Code: F6 99
• Description: The machine language setup does not coincide with the FAX board language setup.
• Causes: FAX board correction error SIM setup error
• Remedy: Check the firmware of the FAX board and the combination of the panel screen data, and download the correct version, if necessary. Check the machine language information. (Machine language setup: SIM 26-22)

• Code: F9 00
• Description: MCU-PRT communication trouble. Communication establishment error/ framing/parity/protocol error
• Causes: Printer PWB connector disconnection Harness trouble between the printer PWB and the MCU PWB Motherboard connector pin breakage Printer PWB ROM trouble/Data disturbance
• Remedy: Check the connectors and harness of the printer PWB and MCU PWB. Check the grounding of the copier. Check ROM on printer PWB.

• Code: F9 10
• Description: Printer PWB trouble. Communication trouble between MCU and printer PWB
• Causes: Printer PWB connector disconnection Harness trouble between the printer PWB and the MCU PWB Motherboard connector pin breakage Printer PWB ROM trouble/Data disturbance
• Remedy: Check the connectors and harness of the printer PWB and MCU PWB. Check the grounding of the copier. Check ROM on printer PWB.

• Code: F9 80
• Description: Communication trouble between MCU and printer PWB (Protocol error)
• Causes: Printer PWB connector disconnection Harness trouble between the printer PWB and the MCU PWB Motherboard connector pin breakage Printer PWB ROM trouble/Data disturbance
• Remedy: Check the connectors and harness of the printer PWB and MCU PWB. Check the grounding of the copier. Check ROM on printer PWB.

• Code: F9 81
• Description: Communication trouble between MCU and printer PWB (Parity error)
• Causes: Printer PWB connector disconnection Harness trouble between the printer PWB and the MCU PWB Motherboard connector pin breakage Printer PWB ROM trouble/Data disturbance
• Remedy: Check the connectors and harness of the printer PWB and MCU PWB. Check the grounding of the copier. Check ROM on printer PWB.

• Code: F9 82
• Description: Communication trouble between MCU and printer PWB (Overrun error)
• Causes: Printer PWB connector disconnection Harness trouble between the printer PWB and the MCU PWB Motherboard connector pin breakage Printer PWB ROM trouble/Data disturbance
• Remedy: Check the connectors and harness of the printer PWB and MCU PWB. Check the grounding of the copier. Check ROM on printer PWB.