Little Electronic Component Help Please

[sprocketflup]

Hi, Ive been asked to have a look at a German manufactured coffee maker to see if it can be fixed. Took it apart and found an obviously blown capacitor inside



Cap made by 'ERO' I had to lop the top of it in order to get it off, it had two wires connected straight in before I did that.

Am I correct in my assumption that this is a 0.2 micro farad cap? ive had a look at the RS, Maplin and a couple of other sites and not had any joy, could someone give me a little help in where I might source one of these please?

thanks

Also, since posting that pic, ive realised my laptop keyboard is pretty rank  :wacko:

 

[ProDave]

It's a snubber.

0.2 microfarad 250V non polarised capacitor in parallel with a 1.5 megohm resistor.

Chances are the resistor is just there to discharge the capacitor when you unplug it so it does not leave the mains plug pins "live" due to a charged capacitor.

Very similar, if not identical to what's used in a lot of flourescent light fittings.

 

[brman]

I have to admit I though snubbers normally have series resistors............

 

[ProDave]

Yes I could be wrong. Since the resistor is a very high value it might just be there to discharge the capacitor when unplugged as I already mentioned.

 

[Sidewinder]

You could try RS 707-7928 in parallel with a pair of RS 206-7724 (which are in series).

So the caps are in series and the ends of these are in parallel with the R

----+--------||-------||-------+------

      |                                |

      |          ______          |

      +-------|_____|--------+

 

[Marvo]

It's a class x cap so I assume it was connected across the incoming live and neutral like a suppressor. The coffee machine should run without the capacitor installed, if it's not working there's possibly another problem.

You could try RS 707-7928 in parallel with a pair of RS 206-7724 (which are in series).
So the caps are in series and the ends of these are in parallel with the R
 
 
----+--------||-------||-------+------
      |                                |
      |          ______          |
      +-------|_____|--------+

The RS 206-7724 is 100nF so parallel configuration of the two caps in your sketch would give total a value closer to the original 0.2uF. 

 

[Andy™]

if its failed short circuit then it could stop the coffee machine working by blowing the fuse

 

[Sidewinder]

It's a class x cap so I assume it was connected across the incoming live and neutral like a suppressor. The coffee machine should run without the capacitor installed, if it's not working there's possibly another problem.

The RS 206-7724 is 100nF so parallel configuration of the two caps in your sketch would give total a value closer to the original 0.2uF. 

You are quite correct Marvo, a bit of a brain fail there!

I deliberately went for the 100nF as they were half the required capacitance, and then just went the wrong way...

I had something else on my mind, long story, that is what comes of not concentrating.

 

[Evans Electric]

Hi, Ive been asked to have a look at a German manufactured coffee maker to see if it can be fixed. Took it apart and found an obviously blown capacitor inside



Cap made by 'ERO' I had to lop the top of it in order to get it off, it had two wires connected straight in before I did that.

Am I correct in my assumption that this is a 0.2 micro farad cap? ive had a look at the RS, Maplin and a couple of other sites and not had any joy, could someone give me a little help in where I might source one of these please?

thanks

Also, since posting that pic, ive realised my laptop keyboard is pretty rank  :wacko:

Rank !    ....Theres a whole micro-universe of previously undiscovered life forms in there

 

[sprocketflup]

cool! thanks boss x

 

[sprocketflup]

Im back on this lol

Customer returned to Germany for a visit recently and whilst there made enquiries as to replacing the cap and returned home with this -



Original cap just had two wires going in the top, and as Marvo correctly guessed was wired across the L and N.

How do I wire this in please?

Incidentally the machine does work without the cap connected as pointed out up there, and Andy mentioned a fuse - no sign of one anywhere in the machine or its European plug

Also, my laptop keyboards hygiene has not improved

 

[kerching]

Well that does not look like the original to me

The old one was a cap/resistor combo, this one is just a dual value cap.......i think

 

[Blue Duck]

Ehem...

http://www.viking-direct.co.uk/a/pb/Office-Depot-Screen-Keyboard-Cleaner-250ml/id=1510889/

 

[IzzyS]

Vishay bought ERO in the mid 1990's.  You could try asking them if it's time for a more modern coffee maker

 

[sprocketflup]

they are beholden to this one..... I asked what was so special about it, apparently it makes the best coffee ever.

Cant see it meself like :/

 

[Jono Pashley]

I could tell you the answer but we all agreed to never tell you unless you clean that monstrosity you call a keyboard 

 

[Blue Duck]

Agreed :slap

 

[NozSpark]

:vomit