Mains Capacitor

[spimps]

Had a Beko fridge/freezer with a duff mains cap on the pcb and was going to change the mains capacitor,however the complete board was only £12.50 ish trade so fitted the complete board.Would be interested if anyone can help id a replacement capacitor as a matter of interest.
Numbers on it are 10N561K and 938+ few what appear to be logo type marks which are too small to id.Is this a .1uf or 1uf ?
Does anyone carry a selection of these and what would you recommend.
Cheers
BG

[Allsorts]

Re: Mains Capacitor

The 10N561K could be a variable disc resistor (varistor)

[spimps]

Re: Mains Capacitor

When I was checking for fault there was the 240v which went to one leg then there was no voltage anywhere else on the board.

[Hollytree_Technical]

Re: Mains Capacitor

What symbol is printed on the board under it? What is the component number on the board under it?

As Allsorts says it could be a varistor which is used for surge suppression, if so it should be a very high resistance across the incoming power lines.

Photos of the item and board may also help us to help you more.

Jem

[spimps]

Re: Mains Capacitor

removed cap to read details on it.fits in the box opposite the square on the board where it fits has VDR3 printed in it (think I see the logic) the capacitor has VDE (think its an E) printed inside a triangle.
Thanks for your interest.
BG

[Hollytree_Technical]

Re: Mains Capacitor

In that case it is almost certainty a varistor (Voltage Dependant Resistor – also known as MOV), If it was a capacitor it would have been marked on the board with a “C”, It is designed to sit there as effectively an open circuit device until a voltage greater than its rating appears across (I think its about 561V if I have read the markings that you have given correctly) it at which point it breaks down and starts conducting, this is to try and protect the board and the rest of the machine from blowing up.

Hope that Helps

Jem

[Hollytree_Technical]

Re: Mains Capacitor

Give us a view of the other side of the board as well and we might be able to help you track down the fault abit more – then again we may not but you have my curiosity roused now.

Jem

[spimps]

Re: Mains Capacitor

Hi here’s the other side:

Thanks for taking the trouble,I was interested to know what the problemmight be,can’t see any blown triacs etc,obviously my knowledge on this subject is slim to none,still like to learn even in my 65th year 🙂
Comes from a country area that is prone to voltage supply problems so don’t know if thats an issue.
Cheers
BG

[Hollytree_Technical]

Re: Mains Capacitor

Using the first image as reference for positions:

From a quick look and assuming that I am guessing correctly that the voltage comes in on the left hand pins of KN3 then I reckon that I would start by looking at the big blue square cap, might even be worth taking it off of the board and looking underneath as they often blow out the bottom but not always majorly (sometimes no visable damage) also try changing it as they can breakdown under load and are a regular failure item, after that if you are happy measuring live voltages then I would be looking at the DC voltage across D3 and across D5 – this should be into the low voltage side of things at this point.

Jem

[spimps]

Re: Mains Capacitor

Thanks for your help, will see if I can purchase a replacement cap to try,no visible damage to underneath of cap.

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