Error code C-0374 for Bizhub Press 1250 1250P 1052 Bizhub Pro 951

Code: C-0374
Classification: PF: Fan abnormality
2nd tandem PF-703/706 paper feed assist fan /Fr2 (FM5: PF-703, FM3: PF-706) power abnormality.
The FM5 EM and the FM3 EM error detection signals are detected twice in succession within a period of time after FM5 and FM3 was turned ON. At this time, an error detection signal (blowout of ICP) is detected.


Measures to take when alert occurs:
The main body and the option stop immediately.

Estimated abnormal parts:

  • Paper feed assist fan /Fr2 (FM5: PF-703)
  • Paper feed assist fan /Fr2 (FM3: PF-706)
  • PF drive board (PFUDB)

Turn OFF/ON the power switch (SW2) of the main body when releasing an abnormal condition.

Note: The message "Please call service" is displayed on the panel.
  1. Check the connector connection and the wiring between PFUDB and the fan, and repair it if any abnormality.
  2. Rotate the fan or I/O by hand, and repair it if any abnormality. (Wiring diagram: PF-703: 10-F, PF-706: 7-C).
  3. Replace FM5 and PFUDB at a time: PF-703.
          Replace FM3 and PFUDB at a time: PF-706.
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