• Code: 747
• Description: Booklet finisher lift motor error
• Causes: • Defective paper height sensor • Loose connection of the paper height sensor • Defective upper limit sensor • Loose connection of the upper limit sensor • Defective lift motor • Loose connection of the lift motor • Incorrect assembling of the lift motor • Defective lift motor encoder sensor • Loose connection of the lift motor encoder sensor

• Code: 748
• Description: Booklet finisher backup data error
  The CPU tries to write data in the EEPROM three times, but fails to write data.
• Causes: • Defective EEPROM • EEPROM not installed

• Code: 749
• Description: Booklet finisher punch-unit communication error
• Causes: • The finisher controller cannot communicate with the punch-unit controller.

• Code: 750
• Description: Booklet finisher punch-unit controller error
  The checksum in the backup data is inconsistent.
• Causes: • Defective EEPROM(on the punch-unit controller) • EEPROM not installed

• Code: 751
• Description: Booklet finisher punch-unit sensor error 1
  The paper edge and size sensors receive the 2.5-volt light or weaker light even when the source emits 4.4-volt light.
• Causes: • Defective sensors • Dirty sensors

• Code: 752
• Description: Booklet finisher punch-unit registration motor error
  • The registration motor drives the slide unit to the rear side for 1 second. But the home position sensor does not turn on. • The registration motor drives the slide unit to the front side for 1 second. But the home position sensor does not turn off.
• Causes: • Incorrect assembly of the registration motor • Loose connection of the registration motor • Defective home position sensor • Loose connection of the home position sensor

• Code: 753
• Description: Booklet finisher punch-unit punch motor error
  • The punch motor starts to drive the punch cams. But the controller does not receive the encoder-lock signal for 60 milliseconds. • The punch motor start to drive the punch cams. But the home positions sensor does not turn on for 250 milliseconds.
• Causes: • Malfunction of the punch motor • Loose connection of the punch motor • Defective home position sensor • Loose connection of the home position sensor • Loose connection of the encoder sensor • Defective encoder sensor

• Code: 754
• Description: Booklet finisher punch-unit sensor error 2
  The A/D inputs of the sensor are not corrected by varying the D/A outputs.
• Causes: • Defective sensor • Dirty sensor