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bigclive
bigclive

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Microwave body sensor repair.

This video was a full version that was thwarted by a glitch on the Samsung S6 I was testing to see if I might choose a more recent model to record with.  Something went wrong resulting in a pause in the recording turning into a static frame with audio, followed by the rest of the video after the audio had finished.

This is a re-record on my old faithful MotoG.

https://youtu.be/Vycb5ptfkJg

The video shows a very common failure of this type of unit.  It always seems to be the power supply circuitry that fails in a few distinct ways.

I did try and unroll the faulty capacitor afterwards and the film was ultra thin with the metalisation affected by a blotchy thinning effect along its length.

Microwave body sensor repair.

Comments

I've had similar experience with CPC over the years. Coincidentally I also had one order going back 10 years ago arrive with a bungee strap instead of an item I ordered. I also had many orders arrive ill-packed, mainly smashed light bulbs or pieces missing due to UPS damaging the packaging. I've yet to see UPS deliver a package that isn't either dented, wet or torn. CPC's surcharge to Ireland is €6.

Seán Byrne

Thanks Clive, it will be less expensive than wrapping the sewing machine in tin foil ;-)) to suppress the radio emissions. -more waffle- I will have a look at some of my dead kit to see if I can salvage a few or I will have to make up a bigger order to save on P&P from Rapid or CPC. Last year I bought a Duratool desoldering pump without the pump from CPC. Sad to say it was no better than Ebay since the glass tube was too large in diameter and would not create a vacuum (they sent a replacement had a better fitting tube) very poor quality [it was not the only fault with the unit]. I must say I was a bit surprised. Back in the 1980 we used RS and Farnell for most things. I still think we are better supporting the traditional suppliers and pay a bit more since you don't have to wait long for delivery or support. John

John Harrison

You should be able to get a 100n suppression cap online. The machine should work without it, but will create more electrical noise. The voltage rating for these is usually stated as the AC voltage. Often 275V or 300V.

Big Clive

Funny thing is I was going to ask about a Sewing machine X2 capacitor fail You can see the black exit wound on the X2 https://photos.app.goo.gl/RzoA8dAHJsc4NKgf8 I hope just to replace this next year and that nothing else blew on the PCB, it is a UK machine now in Canada running on 2 phase 110v so it may have been a bit much for a 250v rated X2. I was looking on uk.farnell.com and might get a higher rated voltage X2, they have an odd way of saying 100n -waffle warning- The Husqvarna Optima 610 sewing machine had not been used for many years and did not run with the foot pedal lucky I could turn the bobbin winder and free up the motor and eventually got it up to full speed. Then after playing with the stitch type the machine would only run in reverse. Talk about having problems with a spudger you needed a trowel to get the side panels off. The problem was the grease had set to wax and two quite large aluminium bearings had stuck to the shafts, after a bit of solvent I got it running just like a ? "sewing machine" ? The snowball effect - I could now start to bling hem my mothers trousers - or so I thought - I was on the second leg pinning the hem fold and I could not see what I was doing for the smoke coming from the machine. I did find this about the same sewing machine mine had a different PCB, but the same fault https://www.eevblog.com/forum/repair/husqvarna-optima-610-sewing-machine-repair-help-needed/ In Canada my father had scrapped some of the UK gear he took over with him or I would have salvaged a capacitor from that. -bonus material- if you managed to read this far https://photos.app.goo.gl/jCf61zbC1eoA47gX8 It reminded me of Clive's Pink dangly nadgers video I did consider running it without the capacitor but I have noticed a few radio ham aerials near where my parents live. In the UK I had a 40yold Blue Bosh jigsaw from the Blacksmiths shop, it runs fine without the capacitor and I don't use it much. The odd thing about this capacitor was that one of the legs was just stabbed into the stator with a curly spring wire. John

John Harrison

They usually do link to the same video. The link in the text is for the benefit of the email notification. Ewen PS: I don’t think the failed recording got uploaded at all.

Ewen McNeill

both videos link to the same file.

Bill Kerr

Clive I've loved your videos for so long, and I'm so sorry that you've been plagued by camera issues for so long. My fondest wish for you is to not have to be bothered with these issues any longer. It has nothing to do with hearing about it or seeing the (extremely) occasional glitches, I'm just wising for you fewer cares and woes because of the continual electronic joy you bring to my life. You opened my eyes to the travails of metal film capacitors and I'm keeping an eye out for them at work where I evaluate repairs on industrial equipment. It is amazing how many techs seem to ignore some of the most obvious components to replace on gear that has been in service for a long time or has an unknown provenance, but that is largely based on how things are run where i work.

Michael Thompson

Have you looked at the Pixel phones? I gave up on Moto/Lenovo's frustrating updates and got the Pixel 3a in the summer. Google has a great track record of keeping updates coming for older Pixel models so far, and any Google branded phone is typically well supported by third party ROMs well into the future.


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