• Code: 50
• Description: The purge cam HP switch does not come ON even afterthe purge cam has been driven by the specified number of pulses
• Causes: • Purge unit • Purge-related gears onthe main chassis (Purgegears 18 and 19, gearstopper, and purgebevel gear 18) • Main chassis • Paper feed motor • Main PCB

• Code: 51
• Description: The purge cam HP switch does not go OFF even after thepurge cam has been driven by the specified number ofpulses.
• Causes:

• Code: 52
• Description: The pump switching cam HP switch does not come ONeven after the switching cam has been driven by thespecified number of pulses.
• Causes:

• Code: 53
• Description: The pump switching cam HP switch does not go OFF evenafter the switching cam has been driven by the specifiednumber of pulses.
• Causes:

• Code: 54
• Description: When the machine was placed in the ink replacementmode, the carriage was moved by hand to the right and outof the replacement position.
• Causes: • Restart the machine.

• Code: 7D
• Description: Any of the ink dot counters has counted up to thespecified number of dots, meaning the end of the headservice life.
• Causes: • Print head unit • Ink absorber

• Code: 7E
• Description: No print head unit is detected.
• Causes: • Print head unit • Carriage PCB • Head flat cables • Main PCB

• Code: 7F
• Description: Print engine error.
• Causes: • Main PCB