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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         :  ECD17703     DATE             : 94-05-05
 MANDATORY         :  N
 AUTOMATIC SHIPMENT:  N            SERVICE CODE     : 33
 PARTS SOURCE      :  FUJI         AVAILABILITY DATE: 92/11
                                                                                
 PURPOSE:                                                                       
 1.TO PREVENT SPEAKER NOISE WHEN THE SPECIAL SCREEN DISPLAIED.                  
   (50% GRAY SCREEN ETC...)                                                     
 2.TO PREVENT HANG UP CONDITION WHEN POWER UP OR AUTO DIM                       
   FUNCTION IS WORKING.                                                         

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

 Plant 97                                                       

 5530- B/M0005530 SEE PHYSICAL CHECK       B/M49G0351 00.7 00.7 
 UXX                                                            
 VXX                                                            
 WXX                                                            

                                                                                
 PHYSICAL CHECK:                                                                
 CHECK THE MACHINE S/N, EC# OF SYSTEM BOARD AND BLUE LABEL ON                   
 SYSTEM BOARD.                                                                  
 FOLLOWING MACHINES ARE AFFECTED.                                               
                                                                                
 1.SPEAKER NOISE                                                                
                             SYSTEM BOARD                                       
   MODEL S/N                  P/N     EC#                                       
   ----- ------------------ ------- -------                                     
    V04  97C0001<-->97C2401 79F5394 C72342                                      
         97F0001<-->97G0166         C72342A                                     
    VX8  97H0001<-->97H2423         C72342B                                     
         97H3071<-->97H4300         C72342T                                     
         97L0001<-->97L2500         C72342C                                     
                                    C72342D                                     
    WXA  97P0001<-->97P1411 95F4279 C80694B                                     
         97P2101<-->97P5256         C80694C                                     
    WCA  97Z5001<-->97Z5100         C80694D  (CHINA MODEL)                      
         97Z5251<-->97Z5270         C80694E                                     
    WTA  97Z5101<-->97Z5170                  (TAIWAN MODEL)                     
                                                                                
 2.MACHINE HANG UP CONDITION                                                    
                             SYSTEM BOARD                                       
   MODEL S/N                  P/N     EC#                                       
   ----- ------------------ ------- -------                                     
    U01  9760001<-->9760023 79F5393 C72341A  WITHOUT BLUE LABEL                 
    UV1  9761001<-->9762105                                                     
    UW4  9770001<-->9771630                                                     
    UW8  9790001<-->9792032                                                     
    UA1  97A0001<-->97A0240 79F5394 C72342   WITHOUT BLUE LABEL                 
    UA4  97A5001<-->97A5556         C72342A  WITHOUT BLUE LABEL                 
    UAW  97B0001<-->97B0806         C72342B  WITHOUT BLUE LABEL                 
    V04  97C0001<-->97C1100         C72342T  WITHOUT BLUE LABEL                 
         97F0001<-->97F4258                                                     
    VX8  97H0001<-->97H3640                                                     
         97H3721<-->97H3800                                                     
         97L0001<-->97L2402                                                     
    WXA  97P0001<-->97P0600 95F4279 C80694B  WITHOIT BLUE LABEL                 
         97P2101<-->97P3500         C80694C  WITHOUT BLUE LABEL                 
                                                                                
 PREREQUISITES: NONE                                                            
                                                                                
 COMPANION: NONE                                                                
                                                                                
 CONCURRENT: NONE                                                               
                                                                                
 DETAIL:                                                                        
 1. SPEAKER NOISE                                                               
    ADD 33000PF CAPACITOR AT U33 PIN# 6 TO 9 ON SYSTEM BOARD.                   
 2. MACHINE HANG UP CONDITION                                                   
    ADD 4700PF CAPACITOR AT HDD-LIGHT SIGNAL ON SYSTEM BOARD.                   
    ADD 10000PF CAPACITOR AT PWRSAVEON SIGNAL ON SYSTEM BOARD.                  
                                                                                
 NOTES:                                                                         
 THIS FBM IS AVAILABLE FOR ONE YEAR.(OCT./31/1993)                              
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