• Code: A2
• Description: Document too long to scan.
• Causes: • Document front sensor actuator • Document rear sensor actuator • Control panel PCB • Document sensor PCB • Document feed roller • Scanner motor • Main PCB

• Code: A3
• Description: Document not detected by the document rear sensor.
• Causes:

• Code: A4
• Description: 50% or more faulty of white level data.
• Causes: • CIS unit • Main PCB

• Code: A7
• Description: One-line feeding timeout.
• Causes:

• Code: A8
• Description: One-line scanning timeout.
• Causes:

• Code: AC
• Description: Less than 50% faulty of white level data.
• Causes: • CIS unit • Main PCB

• Code: B7
• Description: A/D converter reference voltage error (at High level).
• Causes: • Main PCB

• Code: B8
• Description: A/D converter reference voltage error (at Low level).
• Causes: • Main PCB