12v (input) issues.

Discussion in 'DM800HD Schematic drawings, Pcb images etc..' started by Johnny B., Jun 12, 2015.

  1. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    Four coils model with L36/L36A - L37/L37A,
    4coils.jpg

    Four coils model with L36/111 - L37/222,
    12vsnap2.jpg

    Two coils (old) model with L36 - L37, (C) Forhike
    DM800_power_PCB_bottom.png


    12 volts places,
    12vdc-places=dm800.jpg

    12v shorting on the pcb, Most defective spots.
    Most defective spot is the C312, C313, or C314.
    Best is to remove them, measure by Ohm if it's solved.
    If not, do the same at the other spots.

    12vshortspots2.jpg

    Why, because they all are connected between 12v and ground.
    If one of them is shorted.. Then you have shorting.


    Howto measure short circuit ? (Ohm measurement).
    Disconnect the power supply when you measure ohms.
    Measure-12v-circuit.jpg


    More advanced drawing, in this you can see all the connections to the 12v circuit.
    dm800-12v-circuit-information.jpg
     
    Daniel likes this.