Error code C-1304 for Bizhub Press 1250 1250P 1052 Bizhub Pro 951

Code: C-1304
Classification: LS (1st tandem): LS abnormality
Cause:
An error detection signal of FM4 is detected continuously for a specified period of time while the motor cooling fan motor (FM4) is ON.

Measures to take when alert occurs:

         The main body and the option stop immediately.                                                 
Estimated abnormal parts:
  • Motor cooling fan motor  (FM4)
  • LS control board (LSCB)
Correction:      
Note: 
  • The message "Please call service" is displayed on the panel.

Solution:

  1. Check the connector connection and the wiring between LSCB and the fan, and repair it if any abnormality.
  2. Rotate the fan by hand, and repair or replace it when there is any abnormality. (Wiring diagram: LS-505: 7-H, LS-506: 6-H). 
  3. Replace FM4.
  4. Replace LSCB.
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