• Code: 47
• Description: Head parameters stored in the EEPROM are invalid. (This code may appear only in the maintenance mode.)
• Causes: • Print head unit • Main PCB • Power supply PCB

• Code: 48
• Description: Weak connection of the head flat cables.
• Causes: • Head flat cables • Main PCB

• Code: 4D
• Description: Error in the head drive voltage parameter stored in the EEPROM but not accessible at the user site. (This code may appear only in the maintenance mode.)
• Causes: • Main PCB

• Code: 4E
• Description: Out of the allowable range of the head drive voltage designed for individual print head properties. (This code may appear only in the maintenance mode.)
• Causes: • Main PCB • Print head unit

• Code: 50
• Description: The purge cam HP switch does not come ON even after the purge cam has been driven by the specified number of pulses.
• Causes: • Purge unit • Purge-related gears on the main chassis (Purge bevel gear A, ASF/purge idle gear, and ASF-purge switching gear 23) • Main chassis • Paper feed motor • Main PCB

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

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

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