Error code C-1231 for Bizhub Press 1250 1250P 1052 Bizhub Pro 951

Code: C-1231
Classification: FD: FD abnormality
Cause:
After the FD paper lift motor/Lw (M9) is in the down operation, the PI lift plate home sensor/Lw (PS40) does not become active within a specified period of time. Alternatively, after the paper lift motor/Lw (M9) is in the Up operation. The PI upper limit sensor/Lw (PS38) does not become active.   

Measures to take when alert occurs:

The main body and the option stop immediately.                                                 
Estimated abnormal parts:
  • Paper lift motor/Lw (M9)
  • PI drive board (PIDB)
  • PI lift plate home sensor/Lw (PS40) 
  • PI upper limit sensor/Lw (PS38)
Correction:
Press the 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 messages "Please call service" and "Press [Help] to disengage" are displayed alternately on the touch panel.
  • When you press the help key, the message "Please turn on power again" is displayed on the touch panel.                    
Solution:
  1. Check the PI lower tray section, and clean or repair it when there is any abnormality.
  2. Check the connector connection and the wiring among PIDB, motors and sensors, and repair it when there is any abnormality.
  3. Check the I/O drive of the motor and the coupling of the gear, and repair or replace it when  there is any abnormality. (Wiring diagram: FD-503: 9-A)
  4. Check I/O and the operation of the sensor, and repair or replace it when there is any abnormality. (Wiring diagram: FD-503: 7-A, 8-A)
  5. Replace PS38 or PS40.
  6. Replace M9.
  7. Replace PIDB.
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