Beko WMB61431 blown pcb

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  • April 23, 2015 at 9:20 am #84771
    char14lew
    Participant

    Hi All,The above machine has blown a hole in the T2 triac & blown the R50 resistor.These are on the door interlock track.The pcb has been repaired and checked ok and the interlock replaced although it had a normal resistance reading.There is no other visable signs of damage on pcb and all capacitors,diodes & resistors have checked ok.The machine turns on and displays ok,but when a programme is selected the wash light comes on but nothing happens. Any pointers please!

    April 28, 2015 at 7:01 pm #426722
    TechSmart
    Participant

    Re: Beko WMB61431 blown pcb

    Hoping my first post on this forum could be useful to you. I’m not familiar with this model from memory but do you get a door open or time out if the machine is left for awhile?

    Could be that the detonated triac has damaged the input pin on the microprocessor and as such it can’t tell the door is closed or it has damaged the driving transistor/FET that is usually in-between the processor and Triac.

    April 30, 2015 at 2:21 pm #426723
    char14lew
    Participant

    Re: Beko WMB61431 blown pcb

    ok thanks for your help,when the programme and start is selected, the wash light comes on but nothing happens.It appears not to be sending/getting any signal from the door lock,there’s continuity through the cable when disconected from pcb & lock so your theory may be right.regards

    April 30, 2015 at 4:47 pm #426724
    TechSmart
    Participant

    Re: Beko WMB61431 blown pcb

    Yeah, definitely sounds about right. Try tracing the path from the Triac to the PCB see if there’s any tiny surface mount resistors/transistors that have blown. If not then I’d say that one is kaput :/

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