• Code: 744
• Description: Booklet finisher rear jogger fence motor error
  • The rear-jogger-fence home-position sensor does not turn off within 3 seconds after the rear-jogger-fence motor starts. • The rear-jogger-fence home-position sensor does not turn on within 3 seconds when the rear-jogger-fence motor is driving the fence to its home position.
• Causes: • Incorrect assembling of the rear jogger fence • Loose connection of the rear jogger fence motor • Defective rear-joggerfence home-position sensor • Loose connection of the rear-jogger-fence home-position sensor

• Code: 745
• Description: Booklet finisher stack-tray exit motor error
  • The stack-tray-belt home-position sensor does not turn off within 394 milliseconds after the stack-tray exit roller starts to drive the belts. → The stack-tray exit motor retries to drive the belts, but the stack-traybelt home-position sensor still does not turn off within another 394 milliseconds. • The stack-tray-belt home-position sensor does not turn on within 1,084 milliseconds after the same home-position sensor turns off. → The stack-tray exit motor retires to drive the belts, but the stack-tray belt home-position sensor still does not turn on within another 1,084 milliseconds.
• Causes: • Defective stack-tray exit motor • Loose connection of the stack-tray exit motor • Defective stack-traybelt home-position sensor • Loose connection of the stack-tray-belt home-position sensor

• Code: 746
• Description: Booklet finisher stapler/folder motor error
  • The stapler/folder motor starts. However, the controller does not receive the signal from the encoder sensor within 0.1 second. • The stapler/folder motor starts to drive the stapler unit, and the stapler switch is on. However, the controller does not receive the signal from the home position sensor for 0.5 second. • The stapler starts to staple the paper. However, the controller does not receive any signal from the home position sensor, and the stapler switch is off. • The stapler/folder motor starts to drive the folder rollers. However, the home position sensor does not turn off within 9.247 seconds. • The home position sensor does not turn on within 9.247 seconds after this same sensor turns off.
• Causes: • Malfunction of the stapler/folder motor • Loose connection of the stapler/folder motor • Loose connection of the encoder sensor • Defective encoder sensor • Loose connection of the stapler switch • Defective stapler switch • Loose connection of the stapler home position sensor • Defective stapler home position sensor • Loose connection of the folder-roller home-position sensor • Defective folder-roller home-position sensor

• Code: 747
• Description: Booklet finisher lift motor error
  • The upper limit sensor detects the regular tray while the lift motor is lifting the regular tray. • The paper height sensor does not turn off within 10 seconds after the lift motor starts to lower the regular tray. • The upper limit sensor does not turn off within 10 seconds after the lift motor starts to lower the regular tray. • The paper height sensor does not turn on within 10 seconds after the lift motor starts to lift the regular tray. • The controller does not receive the signal from the lift motor encoder sensor within 50 milliseconds after the lift motor starts.
• 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
  A communication-error alarm is not cleared for 3 seconds.
• 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