SAF-C167CR-LM HA+ MCU

Discussion in 'Microcontrollers and Programming' started by shady, Jan 8, 2017.

  1. shady

    shady

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    I've been trying the fix a controller unit for some time now, so far i've replaced a few blown and shorted parts and now the board is powering up now. However, one of the mosfet is not switching on, I noticed that there wasn't a signal coming to the gate, which comes from SAFC167CR-LM HA+ MCU (Pin 19). I can replace the MCU but the real question is do these MCU have specific codes programmed to them or i can just replace the MCU without programming anything?
     
    shady, Jan 8, 2017
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  2. shady

    Bluejets

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    It requires programming.
    However, before you go changing microcontrollers, usually there is some input that writes to the micro requesting the mosfet be turned on.
    Have you looked at what that might be?
     
    Bluejets, Jan 9, 2017
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  3. shady

    shady

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    I think this where i give up because I have no idea what enables the output to pin 19.
     
    shady, Jan 9, 2017
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  4. shady

    tedstruk

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    usually signal fires it. itw where and when the signal comes from, if there is power at the power pin and ground at the ground pin the chip is enabled.
     
    tedstruk, Jan 10, 2017
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  5. shady

    shady

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    Actually found the root of the problem, faulty diode. The signal from the MCU was fed through a driver then to the mosfet, while diode was connected directly to the gate of the mosfet.
     
    shady, Jan 10, 2017
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