7.  Press [OK]. – It will take approx. 1-2 minutes to read the  
  SFU file. 
 
 
8.  After reading is completed, the firmware update (writing)  
  will commence. 
 
    Note:   
    The abbreviated name/location of the firmware that is being 
    updated will appear in the upper right corner. 
 
9.  If the firmware upgrade completes successfully,  
  RESULT OK will be displayed. 
 
10. Power off the MFP. Turn OFF MFP PWB UPDATE  
DIP SW and refit the MFP PWB cover & left cabinet.