bosch srv43a03gb/08 dead pcb

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  • July 30, 2015 at 8:46 am #85684
    DDA
    Participant

    I have the above appliance and the pcb is not displaying any life. live and neut feeds ok and switch seems ok. no signs of damage or burning or popping.

    I can replace the pcb but am always conscious incise any components have caused the damage.

    Dose anyone have any experience with components causing dead pcb or should i just chance it.

    As always all help appreciated

    Thanks

    Anthony

    July 30, 2015 at 12:07 pm #429263
    electrofix
    Moderator

    Re: bosch srv43a03gb/08 dead pcb

    there will be a low ohm resistor as the power goes to the board. normally value under 100 ohm. if this has blown it may be just this resitor or the power chip that supplies the board. dont just bridge the resistor in case power chip is short circuit, it is meant to act as a safety fuse

    Dave

    July 30, 2015 at 4:03 pm #429264
    nomadPaul
    Participant

    Re: bosch srv43a03gb/08 dead pcb

    Can you post a picture of the board components ? There should be maybe 5 chips/triacs grouped together in one corner . Check to see if any of these have the top ‘blown off’ a little . If one does , post the pic and I’ll see if i can let you know what it controls .

    July 30, 2015 at 4:04 pm #429265
    nomadPaul
    Participant

    Re: bosch srv43a03gb/08 dead pcb

    ……and the customer leaving the machine switched on , even after the cycle has finished can blow the pcb.

    September 7, 2015 at 2:54 pm #429266
    DDA
    Participant

    Re: bosch srv43a03gb/08 dead pcb

    is this image any good

    September 7, 2015 at 6:21 pm #429267
    nomadPaul
    Participant

    Re: bosch srv43a03gb/08 dead pcb

    That looks like a blown triac there and if it is the one I think that has a blown top , it’s the water point motor that’s gone so you’ll be looking at a new heater box AND module.
    If you look at the collection of 4 triacs , the one slightly away from the others had a small section missing from its lid……that’s the one that’s failed.

    October 14, 2015 at 4:29 pm #429268
    DDA
    Participant

    Re: bosch srv43a03gb/08 dead pcb

    i thought that had gone. cheers for the info.

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