Error code C-1204 for Bizhub Press 1250 1250P 1052 Bizhub Pro 951

Code: C-1204
Classification: LS (1st tandem): LS abnormality
Cause:
The grip conveyance home sensor (PS5) does not turn ON within a specified period of time after after the grip conveyance motor (M4) turns ON.
 

Measures to take when alert occurs:

The main body and the option stop immediately.                                                 
Estimated abnormal parts:
  • Grip conveyance motor (M4)
  • Grip conveyance home sensor (PS15)
Correction:
Press the help key, and activate and deactivate the sub power switch (SW2) of the main body.
Note: 
  • Faulty part isolations allows you to use the machine temporarily.
  • When you press the help key, the messages "Please call service" and "Press [Help] to disengage" are alternately displayed.
  • When you press the help key, the message "Please turn on power again" is displayed.                    
Solution:
  1. Check the grip conveyance section, and clean/repair it if any abnormality.
  2. Check the connector connection and the wiring between LSCB and motor/sensor, and repair it if any abnormality.
  3. Check the I/O drive of the motor and the coupling of the gear, and repair and replace it if an abnormality is found. (Wiring diagram: LS-505: 6-A, LS-506: 6-A)
  4. Check I/O and the operation of the sensor, and repair and replace it if an abnormality is found. (Wiring diagram: LS-505: 2-H, LS-506: 2-H)
  5. Replace PS5.
  6. Replace M4.
  7. Replace LSCB.
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