• Code: 7A
• Description: A lock signal of the main motor cannot be detected.
• Causes:
• Remedy: 1 Flat cable connection failure of main motor Check the flat cable connection of the main motor and reconnect them. 2 Main motor failure Replace the main motor. 3 Low voltage power supply PCB failure Replace the low voltage power supply PCB ASSY. 4 Main PCB failure Replace the main PCB ASSY.

• Code: 7B
• Description: An unidentified error occurred.
• Causes: Main PCB failure
• Remedy: Replace the main PCB ASSY.

• Code: 7C
• Description: An unidentified error occurred.
• Causes: Main PCB failure
• Remedy: Replace the main PCB ASSY.

• Code: 7D
• Description: Dirt on drum unit.
• Causes: • Clean the corona wire of drum unit. • Turn OFF the power switch, and turn it ON again after a while.
• Remedy: 1 Dirt on the electrode of the drum unit and on the machine Clean the dirt on the contact points of the both electrodes. (Refer to Fig. 2-11, Fig. 2-12) 2 High voltage power supply PCB failure Replace the high voltage power supply PCB ASSY. 3 Main PCB failure Replace the main PCB ASSY.

• Code: 7E
• Description: An unidentified error occurred.
• Causes: Main PCB failure
• Remedy: Replace the main PCB ASSY.

• Code: 7F
• Description: FAX paper size is incorrect. (Menu setting)
• Causes: 1 Main PCB failure
• Remedy: Replace the main PCB ASSY.

• Code: 80
• Description: FAX paper size is incorrect. (The actually loaded paper is small)
• Causes: 1 Main PCB failure
• Remedy: Replace the main PCB ASSY.

• Code: 83
• Description: Drum unit error (An drum error occurred after the drum unit reached the end of life.)
• Causes: 1 Main PCB failure
• Remedy: Replace the main PCB ASSY.