Error code C-1273 for Bizhub Press 1250 1250P 1052 Bizhub Pro 951

Code: C-1273
Classification: SD: SD-513 abnormality
Cause:
After a specified period of time elapses since the trimmer blade motor (M31) starts to operate, the trimmer blade upper limit sensor (PS50), the trimmer completion sensor (PS54), or the trimmer completion signal (overcurrent detection of M31) does not become active. 

 Measures to take when alert occurs:

         The main body and the option stop immediately.                                                 
Estimated abnormal parts:
  • Trimmer blade upper limit sensor (PS50)
  • Trimmer completion sensor (PS54)
  • Trimmer blade motor (M31)
  • SD drive board (PCB2)
  • SD control board (PCB1)
Correction:
         Press help key and activate and deactivate the sub power switch (SW2) of the main body.
Note: 
  • When you isolate the faulty part, the limited use is available.
  • The message "Please call service" and "Press [Help] to disengage" are displayed alternately on the touch panel.
  • When you press HELP key, the message "Please turn on power again" is displayed on the touch panel.

Solution:

  1. Check the trimmer blade drive section, and if there is any abnormality, clean or repair it.
  2. Check the connector connection and the wiring harness between PCB2 and the motor, PCB1 and the sensor. Then, repair them when there is any abnormality. (Wiring diagram: SD-513 (2/2): 8-B) (Wiring diagram: SD-513 (2/2): 10-O, 11-O). 
  3. Check the connector connection and the wiring harness between PCB2 and PCB1, and if there is any abnormality, repair them. 
  4. Check the I/O drive of the motor and the coupling of the gear, and repair or replace it when 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 PS50 and PS54.
  7. Replace M31.
  8. Replace PCB2.
  9. Replace PCB1.
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