Sim Card issues

Discussion in 'DM800HD Schematic drawings, Pcb images etc..' started by Johnny B., Jun 11, 2015.

  1. Johnny B.

    Johnny B. Technical Support Staff Member Moderator

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    Q8, Q9 and more..
    dm800-sim-card-holder-pcb-lines-v3.jpg

    Updated.. extended version,
    Added more info, also voltage and Ohm measurements.

    Simholder-pcblines-etc.jpg
    Q8 info and LM2596 5pins info,

    Q8-etc.jpg


    Howto measure pin 1 (DC volt measurement).

    Sm-A-800hd-simcardmeasurment-pin1-5v.jpg

    Howto check the simcard circuit (Ohm measurement).

    Sm-B-800hd-simcardcheck-ohms.jpg

    Howto check the Q8 (Diode measurement).

    Sm-C-800hd-simcard-q8-check-diode.jpg
     
    jeet999 likes this.