• Code: 54
• Description: Abnormal number of pulses required for a single rotation of the purge cam.
• Causes:

• Code: 70
• Description: Ink-empty mark error.
• Causes: • Ink empty sensor PCB • 1st-bin sensor PCB • 2nd-bin sensor PCB • 1st-bin registration sensor • 2nd-bin registration sensor • Main PCB

• Code: 73
• Description: No ink cartridge loaded.
• Causes: • Ink cartridge sensors • Main PCB • CR base ASSY

• Code: 74
• Description: All the four color inks have run out.
• Causes: • Operation procedure (Any wrong procedure?)

• Code: 79
• Description: Head thermister broken.
  • Carriage ASSY • Main PCB
• Causes:

• Code: 7A
• Description: The carriage encoder failed to detect a paper jam.
• Causes: • Encoder strip (Any stains or scratches? Hooked correctly?) • CR base ASSY

• Code: 7E
• Description: No print head mounted.
• Causes: • Print head unit • Main PCB • Carriage ASSY

• Code: 80
• Description: Recording paper size error.
• Causes: • Paper width sensor actuator • Main PCB • 1st-bin sensor PCB • 2nd-bin sensor PCB • 1st-bin registration sensor • 2nd-bin registration sensor