• Code: C2
• Description: Identification failure for a new toner cartridge (M)
• Causes: 1 Power off or top cover opened while detecting a new toner cartridge. 2 Toner/new sensor failure. 3 Main PCB failure.
• Remedy: 1 Power off or top cover opened while detecting a new toner cartridge Reset the developing bias voltage and develop roller counter. (Refer to “2.2 Develop Roller Counter Reset Function” in Chapter 7.) 2 Toner/new sensor failure Replace the toner/new sensor PCB ASSY. 3 Main PCB failure Replace the main PCB ASSY.

• Code: C3
• Description: Identification failure for a new toner cartridge (C)
• Causes: 1 Power off or top cover opened while detecting a new toner cartridge. 2 Toner/new sensor failure. 3 Main PCB failure.
• Remedy: 1 Power off or top cover opened while detecting a new toner cartridge Reset the developing bias voltage and develop roller counter. (Refer to “2.2 Develop Roller Counter Reset Function” in Chapter 7.) 2 Toner/new sensor failure Replace the toner/new sensor PCB ASSY. 3 Main PCB failure Replace the main PCB ASSY.

• Code: C6
• Description: Pressure engagement/disengagement failure of toner cartridge
• Causes: 1 Harness connection failure of develop release motor. 2 Harness connection failure of develop release sensor PCB ASSY. 3 Develop release motor failure. 4 Develop release sensor PCB failure. 5 Engine PCB failure. 6 HVPS control PCB failure. 7 Main PCB failure.
• Remedy: 1 Harness connection failure of develop release motor Check the harness connection of the develop release motor and reconnect it. 2 Harness connection failure of develop release sensor PCB ASSY Check the harness connection of the develop release sensor PCB ASSY and reconnect it. 3 Develop release motor failure Replace the develop release motor ASSY. 4 Develop release sensor PCB failure Replace the develop release sensor PCB ASSY. 5 Engine PCB failure Replace the engine PCB ASSY. 6 HVPS control PCB failure Replace the HVPS control PCB ASSY. 7 Main PCB failure Replace the main PCB ASSY.

• Code: C7
• Description: Insufficient memory
• Causes: 1 Main PCB failure.
• Remedy: Replace the main PCB ASSY.

• Code: C8
• Description: RAM area for secure data full
• Causes: 1 Main PCB failure.
• Remedy: Replace the main PCB ASSY.

• Code: C9
• Description: DIMM error
• Causes: 1 Harness connection failure of USB direct interface relay PCB ASSY. 2 USB direct interface relay PCB failure. 3 Main PCB failure.
• Remedy: 1 Harness connection failure of USB direct interface relay PCB ASSY Check the harness connection of the USB direct interface relay PCB ASSY and reconnect it. 2 USB direct interface relay PCB failure Replace the USB direct interface relay PCB ASSY. 3 Main PCB failure Replace the main PCB ASSY.

• Code: CA
• Description: Excess current to USB device
• Causes: 1 Harness connection failure of USB direct interface relay PCB ASSY. 2 USB direct interface relay PCB failure. 3 Main PCB failure.
• Remedy: 1 Harness connection failure of USB direct interface relay PCB ASSY Check the harness connection of the USB direct interface relay PCB ASSY and reconnect it. 2 USB direct interface relay PCB failure Replace the USB direct interface relay PCB ASSY. 3 Main PCB failure Replace the main PCB ASSY.

• Code: CB
• Description: No belt unit
• Causes: 1 Harness connection failure of registration mark L PCB ASSY. 2 Harness connection failure of shutter solenoid of the density sensor. 3 Engine PCB failure. 4 Main PCB failure. 5 Registration mark L PCB failure.
• Remedy: 1 Harness connection failure of registration mark L PCB ASSY Check the harness connection of the registration mark L PCB ASSY and reconnect it. 2 Harness connection failure of shutter solenoid of the density sensor Check the harness connection of shutter solenoid of the density sensor and reconnect it. 3 Engine PCB failure Replace the engine PCB ASSY. 4 Main PCB failure Replace the main PCB ASSY. 5 Registration mark L PCB failure Replace the registration sensor holder ASSY.