SO AS SAID THE TWO COMPONENTS YOU NEED TO

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So as said, the two components you need to change are a varistor and a condensator, as they are place on the board as you see in the picture, it should be easy enough

So as said, the two components you need to change are a varistor and a condensator, as they are place on the board as you see in the picture, it should be easy enough. The varistor could be tricky but in this case is easy as it is the one with the plastic capsule on it.

A varistor is also known as Voltage Dependent Resistor or VDR and are often used to protect circuits against excessive transient voltages by incorporating them into the circuit in such a way that, when triggered, they will shunt the current created by the high voltage away from the sensitive components.

So the varistor (and not varisator, that's a typo) that has to be changed is the 140-150 volts which is way to low for us. What we need is to change it for one that can take 250 volts.

The condensator is the big one you see in the picture, this also has to be removed for one that can take more than 350v, the value about 180-400uF, but you don't have to be so exact about it apparently.



SO AS SAID THE TWO COMPONENTS YOU NEED TO


I got my condensator and varistor from an old power supply, as you can see in the picture, I removed the old condensator, the new condensator takes 450v and value of 140uF but it worked ok for me.


SO AS SAID THE TWO COMPONENTS YOU NEED TO


Soldering the new components into place.


The varistor and the condensator are soldered into place, just be carefully with the polarity of the condensator. Use wikipedia if you are unsure about the polarities.


SO AS SAID THE TWO COMPONENTS YOU NEED TO


So  while you are it, why not also remove the old 110v contact and use the European standard contact for 220v.


SO AS SAID THE TWO COMPONENTS YOU NEED TO


The final test, the charging.


So as you can see the charger works like a charm, so happy charging.


I will finally like to thank mxlars from the
ByggeBolig.no forum in which this "how to" is based on.


SO AS SAID THE TWO COMPONENTS YOU NEED TO

SO AS SAID THE TWO COMPONENTS YOU NEED TO


Kommentar fra ‘Einar S


Ved 240V vekselstrøm får du 339V DC over kondensatoren. Ved +17% margin blir det 400V. Hvis en kondensator av denne dimensjonen blir utsatt for overspenning kan den eksplodere med ganske stor kraft! Grunnen til at jeg bruker 17% er at i 220V laderen sitter det en 150uF 400V kondis.

Kondensatorer skal
IKKE seriekoples uten at det legges utlikningsmotstander over dem. Dersom en av dem har mindre lekkstrøm enn den andre vil den bære inntil hele spenningen!

Switchtransistorene og likeretteren må også være spesifisert for den høyere spenningen. I 240V laderen sitter det en 2SK3679 MOSFET transistor. Sjekk at det er denne eller tilsvarende som sitter i laderen din.

Og komponentene kan lett bli en god del dyrere for 240V, så det er nok ikke så rart at de sparer på delene når det skal produseres tusenvis av ladere. USA er stort marked!

Forøvrig er det et helt annet kretskort i min 240V lader. Det likner ikke engang.

Ikke gå fra laderen med støpselet i etter modiken!


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Tags: components you, new components, components