• Code: B8
• Description: A/D converter standard voltage failure; at Low side.
• Causes:
• Remedy: 1 White level data failure Execute the "Acquisition of white level data (Function code 55)". 2 Document scanner unit failure Replace the document scanner unit. 3 Main PCB failure Replace the main PCB ASSY.

• Code: B9
• Description: Scanning light adjustment error.
• Causes:
• Remedy: 1 White level data failure Execute the "Acquisition of white level data (Function code 55)". 2 Document scanner unit failure Replace the document scanner unit. 3 Main PCB failure Replace the main PCB ASSY.

• Code: BB
• Description: White level data error.
• Causes:
• Remedy: 1 White level data failure Execute the "Acquisition of white level data (Function code 55)". 2 Document scanner unit failure Replace the document scanner unit. 3 Main PCB failure Replace the main PCB ASSY.

• Code: BD
• Description: Black level data error.
• Causes: Main PCB failure
• Remedy: Replace the main PCB ASSY.

• Code: C0
• Description: Failure to detect a new toner cartridge.
• Causes: 1 Power off or front cover opened while detecting a new toner cartridge.
• Remedy: Reset the developing bias voltage and developer roller counter. (Refer to "2.1 Developer Roller Counter Reset Function" in Chapter 5.)

• 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: D1
• Description: Modem initialization failed.
• Causes: 1 Main PCB failure
• Remedy: Replace the main PCB ASSY.