Error code C-1556 for Bizhub Press 1250 1250P 1052 Bizhub Pro 951

Code: C-1556
ClassificationPB: PB abnormality
Cause:

When the glue supply control temperature is reached, the glue tank temperature sensor/Up (TH2) detects an abnormal low temperature. 

 Measures to take when alert occurs:

         The main body and the option stop immediately.                                       
Estimated abnormal parts:
  • AC drive board (ACDB)
  • Glue tank heater (H1)
  • Glue apply roller heater (H2)
  • PB control board (PBCB)
  • PB drive board (PBDB1)
  • Glue apply roller motor (M32)
  • Glue tank temperature sensor/Up (TH2)
Correction: 
         Warning
  • Be sure to select the DIPSW3-1 to 0 after you replace the defective parts. If DIPSW3-1 is selected to 0 before defective parts are fixed, it possibly cause a fire.        
      Note: 
  • The message "Please call service" is displayed on the panel.
Solution:
  1. Check the glue tank heater, and clean or repair it when there is any abnormality.
  2. Check the connector connection and the wiring between PBCB and the temperature sensor, and repair it when there is any abnormality.
  3. Check the connector connection and the wiring between ACDB and the heater, and repair it when there is any abnormality.
  4. Check the installation conditions of the heater and the temperature sensor, and repair or replace it when there is any abnormality. (Wiring diagram: PB-503: 27-Q, 9-U)
  5. Replace TH2.
  6. Replace H2.
  7. Replace ACDB.
  8. Replace PBCB.
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