Error code C-1281 for Bizhub Press 1250 1250P 1052 Bizhub Pro 951

Code: C-1281
Classification: RU: RU-510 abnormality
Cause:
FD alignment motor (M3) drive abnormality.
The CD alignment home sensor (PS3) does not become active even after a specified period of time after M3 starts the home position search operation, or, even after a specified period of time after M3 starts the operation, it does not stop.

Measures to take when alert occurs:

         The main body and the option stop immediately.                                                 
Estimated abnormal parts:
  • FD alignment home sensor (PS3)
  • FD alignment motor (M3)
  • RU control board (RUCB)
Correction:
         Deactivate and activate the power switch (SW2) of the main body when an abnormal condition is released.
Note: 
  • The message "Please call service" is displayed on the panel.

Solution:

  1. Check the FD alignment section, and clean or repair it if any abnormality.
  2. Check the connector connection and the wiring between RUCB and the motor or sensor, and repair it if any abnormality.
  3. Check the I/O drive of the motor and the coupling of the gear, and repair or replace it if any abnormality. (Wiring diagram: RU-510: 1-B)
  4. Check I/O and the operation of the sensor, and repair or replace it if any abnormality. (Wiring diagram: RU-510: 1-B)
  5. Replace PS3.
  6. Replace M3.
  7. Replace RUCB.
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