Treadmill controller (zipro dream (?)) - PCB-ZYXK9- 1111-V1.2.PCB not working

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  • wzamoyski
    Member
    • Mar 2022
    • 27
    • Poland
    #1

    Treadmill controller (zipro dream (?)) - PCB-ZYXK9- 1111-V1.2.PCB not working

    Hello

    I received a treadmill controller (probably Zipro Dream) for repair (more like replacing parts). Board designation: PCB-ZYXK9-1111-V1.2.PCB. existing in it were:
    • mosfet Q9 (originally MDF4N60 was installed) - mounted on P10NK60ZFP;
    • resistor R64 (replaced);
    • F2 protection.

    After turning on the power of AC1 and AC2, the components burned again. The existing elements were desoldered and new ones were soldered. The controller has not been connected yet because I'm afraid they would be destroyed again.

    There are no additional restrictions that can be applied, burnouts, etc.

    Using the 29V from service power supply I have 22.94V​ on M connector. On the Q9 mosfet: gate 5V and disappears, drain - 28.56V, source 28V and drops. D10 has a diode of 0.219 in the test. And I also replaced chip U12.

    Please let me know what else I can check and what to pay attention to.

    Regards
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