samsung BF641 fb xeu pcb

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  • July 26, 2011 at 10:36 am #64154
    electrofix
    Moderator

    samsung BF641 fb xeu

    have the following oven
    no display pcb dead check for power to board ok result pcb needed
    ordered new board from connect, board arrived but is different

    seems from tech bulletin from connect they have made cooling fan controlled by board and you have to also replace part numbers

    DG96-00064B DG96-00065D DG94-00096A
    connect numbers 5045176543314 5045176543307 5045176864631 may not be in correct order

    anyone done this mod ?
    what is assembly bracket upper for ?

    anyone have anymore detailed mod instructions apart from the one i have that just says change all these parts

    thanks

    Dave

    July 26, 2011 at 7:29 pm #356226
    BobHope
    Participant

    Re: samsung BF641 fb xeu pcb

    there is mod for this change on the samsung site but it only gives the part numbers, so i think it will come with the instuctions, it looks like a new pcb wiring harness and a new cooling fan.

    Bob.

    July 27, 2011 at 8:36 am #356227
    electrofix
    Moderator

    Re: samsung BF641 fb xeu pcb

    all parts seem to be bought on their own so no instructions as far as i can see. was hoping samsung website might have more but i dont have access ( how do you get access?)
    parts are 2 wiring harnesses and a top bracket, whatever thats for i dont know, but they are all special order

    thanks for checking

    Dave

    July 27, 2011 at 9:36 am #356228
    admin
    Keymaster

    Re: samsung BF641 fb xeu pcb

    Hi

    Send the customer back to samsung and tell her to demand that due to samsungs faulty design and the faulty part requiring to change the whole harness and thermal cut outs and PCB and the model has been modified due to the PCB failures she is holding them responsible.

    Bryan

    September 9, 2011 at 9:59 am #356229
    electrofix
    Moderator

    Re: samsung BF641 fb xeu pcb

    anyone got any tech info for this oven

    got new board ,wiring harness * 2 plus top oven plate as per instructions on samsungs site.
    top plate is no different from old one so did not fit that. all wiring colours had changed too me over 2 hours to trace all wires through but had to make an educated guess on the remaining.
    got it to the point oven operates all ight and fans work in right places but no heat
    am suspecting faulty thermistor but i dont know. has anyone got a resistance measurement for it. if i disconnect board knows its gone so i would assume resistance is not too high but is this a negative or positive ntc ie does resitance go up or down with rises in temp


    Dave

    September 9, 2011 at 12:47 pm #356230
    admin
    Keymaster

    Re: samsung BF641 fb xeu pcb

    Hi

    Did you fit the overloads correctly ? one n/o one n/c also change the resistor as it may have a different reading from the original.i’ve e-mailed you the tech bulletins

    Bryan

    September 9, 2011 at 1:07 pm #356231
    electrofix
    Moderator

    Re: samsung BF641 fb xeu pcb

    resistor came with harness

    overload at top rear of oven no wires on new harness so can connect
    overload on fan housing n/c tests ok

    Dave

    September 9, 2011 at 1:14 pm #356232
    admin
    Keymaster

    Re: samsung BF641 fb xeu pcb

    all wiring colours had changed too me over 2 hours to trace all wires through but had to make an educated guess on the remaining.

    I suspect that it’s not wired correctly then..New wiring diagram and harness description sent.

    Bryan

    September 20, 2011 at 9:20 am #356233
    electrofix
    Moderator

    Re: samsung BF641 fb xeu pcb

    just to add solutions to the above problem

    have got the oven going by repairing the old board

    inspected new board and found resistor R111 had blown

    sent board back to connect and ordered new board but was careful to order new board before sending old board back

    new board arrived this morning and R111 was blown on arrival. That means connect are sending out returned boards from customers that have fitted them wrongly

    am awaiting new board again as customer still want mod done to update oven hopefully this one will work

    Thanks for your help Bryan your info you supplied proved I had wiring correct despite almost complete colour changes

    moral keep an eye on connect when it comes to electronic parts

    Dave

    September 21, 2011 at 10:45 pm #356234
    leavemetogetonwithit
    Participant

    Re: samsung BF641 fb xeu pcb

    electrofix wrote:

    moral keep an eye on connect when it comes to electronic parts

    Dave

    That warning needs writing up somewhere where everyone can see it. That is very underhand behaviour on their part. We shouldn’t have to deal with stuff like that. Our jobs are difficult enough already.
    Mike.

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