Error code C-1279 for Bizhub Press 1250 1250P 1052 Bizhub Pro 951

Code: C-1279
Classification: SD: SD-513/FD-504 abnormality
Cause:
After the creaser FD roller motor (M201) starts the home position search operation, the FD roller position sensor/1 (PS203) or the FD roller position sensor/2 (PS204) does not become active within a specified period of time. At the start, the activation of the PS203 and PS204 are detected at the same time.

Measures to take when alert occurs:

         The main body and the option stop immediately.                                                 
Estimated abnormal parts:
  • FD roller position sensor/1 (PS203)
  • FD roller position sensor/2 (PS204)
  • FD roller motor (M201)
  • FD drive board (FDDB)
  • SD control board (PCB1)
Correction:
         Press help key and activate and deactivate the sub power switch (SW2) of the main body.
Note: 
  • Faulty part isolation allows you to use the machine temporarily.
  • When you press HELP key, the message "Please call service" and "Press [Help] to disengage" are alternately displayed.
  • When you press HELP key, the message "Please turn on power again" is displayed.

Solution:

  1. Check the spine corner forming drive section, and if there is any abnormality, clean or repair it.
  2. Check the connector connection and the wiring harness between  FDDB and the motor, PCB1 and the sensor. Then, repair them when there is any abnormality. (Wiring diagram: FD-504: 11-F) (Wiring diagram: FD-504: 3-G, 4-G).
  3. Check the connector connection and the wiring harness between FDDB and PCB1, and if there is any abnormality, repair it.
  4. Check the I/O drive of the motor and the coupling of the gear, and repair or replace it if there is any abnormality.
  5. Check I/O and the operation of the sensor, and if there is any abnormality, repair or replace it.
  6. Replace PS203 and PS204.
  7. Replace M201.
  8. Replace FDDB.
  9. Replace PCB1.
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