Duet Washer MCU Repair

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Duet Washer MCU Repair

Рет қаралды 39,831

Күн бұрын

In testing this MCU I found a shorted output transistor, in the video I show how I replaced it by soldering it to the board and reapplying heat sink compound. I also offer a few general tips for soldering and board repair.

Пікірлер: 67

@robertroller7614 Жыл бұрын

This is probably the best video I have seen produced, narrated and kept short and sweet with all pertinent information well done sir!

@Dontleavemedimi Жыл бұрын

Good video thanks, the tip about not staying too long on the solder point makes sense. Ive seen a couple of videos and you are the first to mention that.

@craigpatten9633 Жыл бұрын

Very helpful! Mine gave error 06, tachometer error and the drum wasn't moving at all. Sure enough one transistor was blown and one was suspect. I replace all six with Infineon IKA06N60TXKSA1. $2.09/ea from Digi-Key.

@roberthill1178 2 жыл бұрын

I think you forget to put the part, part number, or link to the part.

@craigpatten9633 Жыл бұрын

I replaced mine with Infineon IKA06N60TXKSA1. $2.09/ea at Digi=Key.

@lavadorasysecadorasdemazat7676 3 жыл бұрын

Very well explained. Very professional. Thank you

@electronicsprojects4708 3 жыл бұрын

you're welcome

@1chamoy20006 5 жыл бұрын

Well recorded and explained!

@khamronklinpak 9 ай бұрын

thank you verymuch

@crrf5970 6 күн бұрын

Hi, excellent work, I have the same MCU and the washing machine marks me error F11, serial com error, what could be ? please.

@OthmanAlikhan 2 жыл бұрын

Thanks for the video =)

@terrybaptist795 6 ай бұрын

You can use soldering braid to remove execess solder fro areas where it isnt supposed to on the circuit board?

@terrybaptist795 6 ай бұрын

You didnt reinstall the repaired and test it to make sure it works?

@jasonphilbrook4332 3 жыл бұрын

The meter is on V for volts when you are testing for short. It should be on Ohms (resistance) to check for shorts. nice helpful video in every other way.

@electronicsprojects4708 3 жыл бұрын

no, this is on 'diode test' mode, it's a test for the threshold voltage at which 1mA will flow. The current may vary depending on the specs of your meter. One way, is OL (blocking current) the other way, usually you will get anywhere from 0.3v to 0.8v. You can also look up KZfaq videos on testing a diode or transistor for further explanation.

@jasonphilbrook4332 3 жыл бұрын

@@electronicsprojects4708 Cool. thanks for the details

@jennyjeepjeep 5 жыл бұрын

thank you sir

@danielmendez1553 5 жыл бұрын

Thank you very much for the contribution. Does this repair correct error F71? Or what is the component that causes the failure and should I change? I will greatly appreciate your valuable response

@electronicsprojects4708 5 жыл бұрын

It may or may not, F71 is a different for different models, so I would be assuming if I answered that. Look on the tech sheet, if it says it's an MCU CCU communication failure most of the time the MCU is a t fault. You can test the individual transistors like in the video.

@mauriciogonzalez325 5 жыл бұрын

How do you know, where is the fault? I have the same MCU and the washing machine marks me error 06. What do I have to do to repair it?

@byubadgerprofessor 3 жыл бұрын

I have a similar washer (Kenmore 110 45091 400) but with the identical looking MCU board. I also have the F06 error code and I tested and one of my transistors tested bad as his did.

@sharonmcmann-morelli4896 3 жыл бұрын

is it worth fixing , mine is 4 years old approximately.....can’t open door, can’t turn on or start....

@maderayhierro 4 жыл бұрын

Hi! What’s the reference of that transistor?

@jpp9876 5 жыл бұрын

One more question. I have a customer with a Jen Air down draft stove. Blower not running. I checked wires going to it for ac n dc current. I got no power going to blower. The control board is no longer available. I also realized later it could be an inverter type controller so my assumption of no power going to motor may be faulty. Any help will be appreciated. Thanks

@sebialex2228 3 жыл бұрын

For me the bridge rectifier blew, and some of the traces that acted like fuse! Probably I could get it fixed, but I’m worried if I bridge the burned link fuse with a wire than next time I get a short or a surge it might damage something else or fry everything!

@electronicsprojects4708 3 жыл бұрын

Usually there are multiple trace fuses, if there are you can just bridge the one that blew. If bridge is shorted, test all standard diodes in the power supply, every once in a while I find they can blow as well.

@19777777michael 4 жыл бұрын

May I ask what part number you changed? My washer is also show error code f71.

@electronicsprojects4708 4 жыл бұрын

there are 6 transistors, you would have to test each one to see if one of them is failed. Look up 'testing for a shorted transistor' on KZfaq if you don't know how. Then look at the part number on the transistor that's failed and order that one.

@19777777michael 4 жыл бұрын

Thank you so much, I will try.

@pavolhanzel5242 Жыл бұрын

When the transistor on my washer shorted, it blew the whole section for that phase - the other transistor, the diodes, gate driver, even the DSP. I guess there's no repairing that :(

@electronicsprojects4708 Жыл бұрын

A short circuit, can definitely be catastrophic and even if you are able to fix it using 10 plus parts, it wouldn't be repeatable, because the nature of a short is it will cause different types of failures, so not much help in making videos on a failure techs won't be able to use in the field.

@EurekaRecycler 3 жыл бұрын

HI, my Duet will not let water in. It has no power going to the water inlet valves. Do you think it is the MCU ? Thank you

@electronicsprojects4708 3 жыл бұрын

could be, check for a burnt spot on the mcu plastic cover after taking the board out. That's a good indicator the mcu is failed.

@samj1012 4 жыл бұрын

good video, but how did u know which transistor is shorted ?I assume u tested them on board then de-soldered the shorted one ? did u ?

@electronicsprojects4708 4 жыл бұрын

at 38 seconds into the video, I test the shorted transistor, you can do this in circuit.

@jaceareza8741 4 жыл бұрын

Electronics Projects you test the transistor short or you short the two terminal pin its coming short what is this video

@lin7117 3 жыл бұрын

Thanks for the video!! My washer shows a f6e1 error. Is it the same error you are solving?

@electronicsprojects4708 3 жыл бұрын

depends on the model #, I'ld recommend calling a professional to diagnose it.

@namilkim8824 3 жыл бұрын

Can you repair .mcu of whirlpool dust washer. I saw burned oard. My washer board not the same this video.

@electronicsprojects4708 3 жыл бұрын

There are repair services like FixYourBoard or Core Centric or search Ebay to find others.

@usman2388 5 жыл бұрын

Is it fixing the MCU error code ?

@electronicsprojects4708 5 жыл бұрын

Customer did not complain of an error code, just no spin or agitation.

@Mrswhoridin 4 жыл бұрын

Im having such a hard time trying to fix mine. Definetly not experienced and really need help. Why cant appliances last like they did way back when....smh

@electronicsprojects4708 4 жыл бұрын

electronics are convenient, but not reliable. Companies cut cost by putting cheap parts and parts that are under the recommended specs. I instruct techs on my channel in advanced repairs on appliances. I would recommend calling out a local company that is trustworthy and has good online reviews to help out.

@Biloxi6969 5 жыл бұрын

Where can I buy that transistor? I need to replace one. Thanks.

@electronicsprojects4708 5 жыл бұрын

Look on your transistor, type the part number in Google, look for it at Mouser or Digikey

@Biloxi6969 5 жыл бұрын

I did but no match. There are two set of numbers on the transistor. Part #K06N60 and FA312. eBay have something close but the legs are all long unlike the one on the MBU. I found a used board on Fleabay for 40 bucks and call it a day. Thanks for your help.

@electronicsprojects4708 5 жыл бұрын

@@Biloxi6969 sometimes they get discontinued and you need to find a valid sub, as well, which can be a pain.

@byubadgerprofessor 3 жыл бұрын

@@Biloxi6969 Yes, I'm having the same problem - that is a hard transistor to find in the US. There are many for sale from China but shipping takes forever. But the boards are selling for $200-300 so I guess I'll wait. There is probably something on Digikey that is similar enough but I don't know how to find it.

@byubadgerprofessor 3 жыл бұрын

@@Biloxi6969 Ah, ok, now I was able to find a used board as well for $40 and that's better than waiting two weeks for the transistors to come from China. Thanks for the tip.

@doctorfeinstone6524 4 жыл бұрын

What causes it to short in the first place?

@electronicsprojects4708 4 жыл бұрын

Motor is a heavy current electrical load, electronic transistors switching these loads over years wear out and can fail without any other cause.

@samj1012 4 жыл бұрын

There is other video on utube, recommends to check and clean drain pump, then if F06 / E02 did not clear only then move to replace the MCU ...Is this correct ?

@electronicsprojects4708 4 жыл бұрын

F06/E02 is a data communications error, not related to the drain. There is another error for drain pump clog.

@samj1012 4 жыл бұрын

@@electronicsprojects4708 so there is a small chance that harness between main board and other parts is disconnected. I assume unplug them and reinstate one by one, may solve the issue.

@electronicsprojects4708 4 жыл бұрын

@@samj1012 Manufacturer says to do that, almost never works for me.

@samj1012 4 жыл бұрын

@@electronicsprojects4708 I have this same board on a washer giving F6/E2 error..I found one PCB connection blown. it was made thin like a fuse connecting R1421(NTC) to the relay K1701..do you think if I reconnect that things would work again, or it maybe another component needs to look at ?

@electronicsprojects4708 4 жыл бұрын

@@samj1012 when I troubleshoot an appliance it's in a customer's home with all my tools, anything else is guessing. Too many different failures on these appliances. In general 'blown' is bad, that means short circuit, and typically can cause a few components to fail on the same assembly.