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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         :  ECC27233     DATE             : 89-11-02
 MANDATORY         :  N
 AUTOMATIC SHIPMENT:  N            SERVICE CODE     : 33
 PARTS SOURCE      :  FUJI         AVAILABILITY DATE: 89/09

 PURPOSE:                                                                       
 THIS ECA IS RELEASED FOR JAPAN USE ONLY                                        
 TO PREVENT POST HUNG UP BY NOISE OF POWER SUPPLY ASM AT POWER
 ON TIME.
                                                                                

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

 Plant 97                                                       

 5571                                                           
 T0A  B/MBASIC   9714587 THRU 9715107      B/M38F9053 01.2 01.2 
 T0B  B/MBASIC   9734182 THRU 9734283      B/M38F9053 01.2 01.2 
 T0C  B/MBASIC   9750893 THRU 9750997      B/M38F9053 01.2 01.2 
                  (EXCLUDING 16 UNITS)                          
                  **REFER TO PHYSICAL                           
                    CHECK                                       

                                                                                
 PHYSICAL CHECK:                                                                
 CHECK EC NUMBER ON POWER SUPPLY ASM P/N 23F3372                                
 IF EC NUMBER OF POWER SUPPLY ASM IS EC# 341961, REPLACE IT                     
 WITH EC# 341961A.                                                              
                                                                                
 **FOLLOWING S/N OF 5571-T0C ARE EXCLUDED FROM MACHINES AFFECTED                
                                                                                
   5571-T0C  S/N:9750917,9750929,9750943,9750948,9750954,9750958                
                 9750963,9750965,9750969,9750980,9750986,9750987                
                 9750992,9750994,9750995,9750996 (16 UNITS)                     
                                                                                
 PREREQUISITES: NONE                                                            
                                                                                
 COMPANION: NONE                                                                
                                                                                
 CONCURRENT: NONE                                                               
                                                                                
 DETAIL: REPLACE A POWER SUPPLY ASM

 NOTES: THIS FBM IS AVAILABLE FOR ONE YEAR.
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