Hack to convert from/to 110V to/from 220V main voltage. Basics guide & Examples

[hedehede81]

at first look I think you might be really lucky here. Even the sizes of the caps look similar which might indicate that this is a universal (110V/220V) power board to cut down the costs. Check the voltage rating of the main big caps, MOVs if any etc. I wouldn't be surprised if they are 99% or 100% similar. 

[mons2b]

Hi Hedehede

Thanks for your reply! If the big main caps are identical to my dead 240v board is it likely this US board is capable of 240v? From what I read some US Panasonic boards are universal (but not disclosed on the back of the tv or manual) and some will release magic smoke.  Theres fets/movs on the underside that cannot be seen because they have been attached to metal heat plates.

Also are the below gadgets capable of being used on a permanent basis to convert power? They are a lot cheaper than one of those heavy transformers. http://www.ebay.com/itm/121933438881?euid=8b38c1920cf44ad7924d8b1d1f92dae9&bu=43193206816&cp=1&sojTags=bu=bu

[UkraineTrain]

Hi guys,
I have a US TV in Germany (Samsung LN46B650). I'd like to make it work on 220v so I don't have to scrap it. The label on the cover says input voltage 110-120v but I see on the board inside that it says 100v-240v. I'm not sure if this applies to the whole system or just a particular component. Any suggestions on what to do?

[amyk]

Trace the input circuitry and look at the voltage ratings of the components there.

[james_s]

You can use a true-sine inverter fed by a hot swap server power supply which can be had for next to nothing, then you can get power in the correct frequency even. I use such a setup to get 240V 50Hz in the US when I was playing more with HID and fluorescent lamps and wanted to properly power the European stuff here.