Error code C-1277 for Bizhub Press 1250 1250P 1052 Bizhub Pro 951

Code: C-1277
ClassificationSD: SD-513/TU-503 abnormality
Cause:

After the slitter movement motor/Fr (M112) starts the home position search operation, the slitter home sensor/Fr (PS114) does not become active within a specified period of time. 

Measures to take when alert occurs:

         The main body and the option stop immediately.                                                 
Estimated abnormal parts:
  • Slitter home sensor/Fr (PS114)
  • Slitter movement motor/Fr (M112)
  • Slitter drive board (TUDB)
  • 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 slitter position shift drive section, and if there is any abnormality, clean or repair it.
  2. Check the connector connection and the wiring harness between TUDB and the motor, PCB1 and the sensor. Then, repair them when there is any abnormality. (Wiring diagram: TU-503: 7-G) (Wiring diagram: TU-503: 2-D).
  3. Check the connector connection and the wiring harness between TUDB 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 PS114.
  7. Replace M112.
  8. Replace TUDB.
  9. Replace PCB1.
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