• Code: C8420
• Description: Booklet stitcher shift motor problem
• Causes: A problem is detected with the shift motor.
• Remedy: See the booklet stitcher service manual.

• Code: C8430
• Description: Booklet stitcher punch communication problem
• Causes: A problem is detected with the punch communication.
• Remedy: See the booklet stitcher service manual.

• Code: C8440
• Description: Booklet stitcher punch sensor problem
• Causes: A problem is detected with the punch sensor.
• Remedy: See the booklet stitcher service manual.

• Code: C8450
• Description: Booklet stitcher side punch sensor problem
• Causes: A problem is detected with the side punch sensor.
• Remedy: See the booklet stitcher service manual.

• Code: C8460
• Description: Booklet stitcher punch backup RAM data problem
• Causes: A problem is detected with the punch backup RAM data.
• Remedy: See the booklet stitcher service manual.

• Code: C8470
• Description: Booklet stitcher punch dust sensor problem
• Causes: A problem is detected with the punch dust sensor.
• Remedy: See the booklet stitcher service manual.

• Code: C8480
• Description: Booklet stitcher broken punch power source wire problem
• Causes: A broken punch power source wire problem is detected.
• Remedy: See the booklet stitcher service manual.

• Code: C8500
• Description: Mailbox drive motor problem
  • While the mailbox drive motor is driving, synchronization signals do not synchronize continually for 464 ms (motor lockup).
• Causes: Defective mailbox drive motor or mailbox main PCB.
• Remedy: Run a simulation of the mailbox If there is any problem with the communication, replace the mailbox drive motor or the mailbox main PCB and check for correct operation.