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(Topic ID: 25640)

reset , on CPU system 11

By marcus600

11 years ago



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  • 3 posts
  • 2 Pinsiders participating
  • Latest reply 11 years ago by Frax
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    #1 11 years ago
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    ???

    marcus600

    Pinside member

    FR Reims

    12y 18,650 44

    again me , i started new post , about my CPU system 11 C

    so here the probleme on VIDEO :

    i verified all the trace for the PIAS and some important component

    after this i changed :

    pias : U41, 42 51 54 38 u10
    Ram : U25
    Transitor : Q50 , 36 , 37 , 38 , 39 , 40 , 41 , 35 , 34
    Condo : C30, 24 , 26 , 29 , 31 , 32
    CI : U49 , 31 , 32 , 33 , 34 , 13 , 11 , 43 , 29 , 35 , 36
    diode : D1 , D 2 , ZR1 , ZR2
    Game : U26 U 27
    Resstor : r65 r 59 , R55 and R57

    still same !!!

    but i know how to start my CPU , forcing the 5 volt on pin 40 From U15 .
    but not all the time !

    it start after the Second start
    1/ first start without forcing the 5 volt
    2/ i turn off
    3/ i wait 10 second
    4/ second start with 5 volt forced and it s ok

    it seen to be the 'POR' but i chanched all

    here the video my CPU starting

    sory for my bad english

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    #2 11 years ago
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    ???

    marcus600

    Pinside member

    FR Reims

    12y 18,650 44

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