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Resistors don't generally burn out without good reason so perhaps there's another issue elsewhere? Either way I'd make a guess at it being 27 ohms (a standard value) - it looks like it's a simple dropper resistor - maybe 270 ohms. Can you show how the board is otherwise connected i.e. power source (what is it, where is it from etc)
what transducer? that's the whole circuit.You don't show the transducer.
what transducer?
what transducer? that's the whole circuit.
oh yes the blue are conected to speaker and the two red are to AC 220 Vit cant be, as Minder said ... there needs to be something that makes the sound, speaker etc
so there are 4 wires coming off the board ... 2 red and 2 blue
where does each pair go to ??
shouldn't i first know the resistor value to replace it so i can test that?Have you checked the LV output of the transformer, some have a thermal fuse embedded in the windings that sometimes opens.
shouldn't i first know the resistor value to replace it so i can test that?
do i need to disconnect it ?I would also do the check on the transformer.
can i check it with blown resistor ?Have you checked the LV output of the transformer, some have a thermal fuse embedded in the windings that sometimes opens.
Is the Spkr OK?
Yes, should be possible, like I said, it should be simple to trace the circuit and document it.can i check it with blown resistor ?
what current should be at the speakers leads ? AC or DCYes, should be possible, like I said, it should be simple to trace the circuit and document it.
All what i get were smoke from that resistorYes, should be possible, like I said, it should be simple to trace the circuit and document it.