Vestel Repair Please confirm these are ok

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Hi

I obtained some of the caps (C877, C878) required on the 17pw15/20 range and I am not sure if they will be ok and was wondering if someone could confirm, I have attached the Datasheet for the parts I have got.

Thanks in advance

[tom66]

Re: Vestel Repair Please confirm these are ok

They are not ideal -- you really need class X. I'm not sure if class Y will work, but I don't think they will last long.

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Re: Vestel Repair Please confirm these are ok

Cheers Tom, What is the difference between x and y all I can see on the datasheet for y is series number and class

[tom66]

Re: Vestel Repair Please confirm these are ok

X is live-to-neutral rated -only-
Y is live-to-earth rated -only-

The use of these in unintended applications is the main reason Vestel had so many failures (trying to be cheap using cheap caps.)

Ideally, you would use a polypropylene or poly-film capacitor, rated at least 800V.

e.g. http://uk.farnell.com/panasonic/ecwh...?Ntt=15nf+800v

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Re: Vestel Repair Please confirm these are ok

Right OK cheers Tom

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Re: Vestel Repair Please confirm these are ok

I'm not sure if class Y will work, but I don't think they will last long.

Yes Tom they did work...once, turned tv on after fitting, worked fine, left it turned off for 24hours and now the TV is just starting and going straight back to standby

[newtothis]

Re: Vestel Repair Please confirm these are ok

Replace the caps with low ESR X class caps and all should be good

[tom66]

Re: Vestel Repair Please confirm these are ok

There is no such thing as a high ESR X cap... they are by their nature low ESR.

[newtothis]

Re: Vestel Repair Please confirm these are ok

There is no such thing as a high ESR X cap... they are by their nature low ESR.

Something learnt

[tom66]

Re: Vestel Repair Please confirm these are ok

Also class X is not recommended, unless they are rated to a minimum of 800V ideally 1kV. Such rated components are rare, so use poly film instead.