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Microwave oven

BGH microwave does not heat or make normal noise

Lucas14
Lucas14
422
hace 6 años
hace 6 años
Good colleagues, I have an analog BGH quick chef microwave with knobs that does not heat, the client told me that sometimes it worked if it hit us hitting us on the right side where the heating elements go. I tested all the components: magnetron, diode, capacitor, thermostat trafo ... everything measures well and works on the tests that must be performed to check the status. What I notice is that when you put it to heat it does not make the classic noise in the heating process you only hear the fan and a humming noise but low. Try another magnetron and do the same, can it be the deal? Of course I would appreciate the help!
oswaldo lizarraga
hace 6 años
hace 6 años
Good morning, have the test disconnect the primary from the high transformer, and in those power cables you put a focus of 50 w, when programming and starting this focus should be turned on, this corroborates that tension is reaching the primary of the high transformer, if the light turns on, check the high voltage elements, such as capacitor, diode, magnetron, high fuse and last the transformer, if it does not turn on the light, check the programmer and the door suiches.
Lucas14
Lucas14
422
hace 6 años

Oswaldo thank you very much, you know that after doing the query I remembered the test you mentioned and I did it, there is no tension in the traffic, now being a microwave without a plate or programmer, the only option is that the problem is in the switches of door no?

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tecnico54
tecnico54
22.006
hace 6 años

if you notice that the cables that go to the transformer leave the programmer the temperature selector knob there must be the fault

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tecnico54
tecnico54
22.006
hace 6 años

it can't be a swichs because the microwave wouldn't work

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oswaldo lizarraga
hace 6 años

Hi Lucas, I clearly indicated that you check the programmer, very early, and you realize that that was the fault, resulting in the part of the bad knob, you have to follow the recommendations indicated to you.

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Lucas14
Lucas14
422
hace 6 años

Oswaldo at least here in Argentina we know a programmer to an electronic board, how the microwave I was checking did not have since it was knobs, the technical colleague told me to check these knobs and there I managed to find the solution

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oswaldo lizarraga
hace 6 años

What happens is that programmer here in Peru is called that mechanical selector, nothing to do with electronic cards, at no time you are mentioned the word plate or card.

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tecnico54
tecnico54
22.006
hace 6 años
hace 6 años
by not carrying a plate and being with a knob it may be that the fault is the temperature selector knob which is faulty check that
Lucas14
Lucas14
422
hace 6 años

Well, technically, I never had to check a knob of these how is it done? Thank you

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tecnico54
tecnico54
22.006
hace 6 años

you have to check that there is continuity in its pins when turning said knob

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tecnico54
tecnico54
22.006
hace 6 años

when turning the knob there must be continuity between the top and bottom pins and when you set the knob to zero it should not give you anything

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tecnico54
tecnico54
22.006
hace 6 años

and also when turning the knob there must be communication between the 2 pins of the top

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Lucas14
Lucas14
422
hace 6 años

Technician directly placed a set of knobs from another BGH that had disassembled months ago and worked perfect, it was the knob as you said thank you very much !!

Responder
tecnico54
tecnico54
22.006
hace 6 años

You're welcome, friend, I'm glad you solved your problem and it was also a pleasure to help you find the fault

Responder
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