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                           IBM ECA
              Engineering Change Announcement

Parts removed from this machine and returned to IBM must be genuine,
                      unaltered IBM Parts

         IBM World Trade Corporation, CE Department Germany
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 EC NUMBER         :  ECD18009     DATE             : 94-05-05
 MANDATORY         :  N
 AUTOMATIC SHIPMENT:  N            SERVICE CODE     : 33
 PARTS SOURCE      :  FUJI         AVAILABILITY DATE: 93/03
                                                                                
 PURPOSE:                                                                       
 THIS ECA IS RELEASED FOR WORLD TRADE USE ONLY AND REVISED                      
 FROM EC# C72350/FBM# 79F5411 TO PREVENT READ ERROR OF 30MB                     
 HDD P/N90X9403(ST-506).                                                        
 NEW FBM USES 30MB HDD P/N6128287(ESDI) INSTEAD OF P/N95F4087                   
 (ST-506).                                                                      

 Type             Machines Affected                             
 Mod.  With       and/or Feature/Device    B/M to be  Serv Syst 
 Stg.  B/M        Description              Installed  Hour Hour 

 Plant 97                                                       

 5502- B/M0005502 SEE PHYSICAL CHECK       B/M54G1759 01.0 01.0 
   S01                                                          
   S11                                                          
   T09                                                          
   TC9                                                          

                                                                                
 PHYSICAL CHECK:                                                                
 CHECK PART NUMBER AND LOT NUMBER OF 30MB HDD ASM.                              
 FOLLOWING FIXED DISK IS AFFECTED.                                              
                                                                                
        FRU P/N : 90X9403                                                       
        LOT#    : XM,XN                                                         
                   (X IS ANY ALPHABET)                                          
                                                                                
 PREREQUISITES: NONE                                                            
                                                                                
 COMPANION: NONE                                                                
                                                                                
 CONCURRENT: NONE                                                               
                                                                                
 DETAIL:                                                                        
 1)REPLACE 30MB HDD P/N90X9403(ST-506) WITH P/N6128287(ESDI).                   
                                                                                
 2)IF THE SYSTEM IS 5551 STAGE-1 THAT HAS A RED POWER SW LEVER,                 
   REPLACE SYSTEM ROMS WITH NEW ONES INCLUDED IN SYSTEM ROM KIT.                
   IF THE SYSTEM IS 5551 STAGE-2 THAT HAS A WHITE POWER SW LEVER,               
   SYSTEM ROM REPLACEMENT DOESN'T NEED.                                         
                                                                                
 3)RUN "AUTOMATIC CONFIGRATION" BECAUSE "CONFIGURATION ERROR"                   
   OCCURS.                                                                      
                                                                                
  *** ATTENTION ***                                                             
 AFTER REPLACEING SYSTEM ROMS ON 5551 STAGE-1,THE SYSTEM BOARD
 P/N WILL CHANGE AND THE OLD HDD(ST-506) CANN'T USE ON THE
 SYSTEM IF THE OLD HDD USE, THE SYSTEM CAN'T RECOGNIZE DRIVE C:.
                                                                                
 NOTES:                                                                         
 THIS FBM IS AVAILABLE UNTIL THE END OF APRIL IN 1994.                          
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