MP710086 change input voltage from 110V to 240V

Probably one of the quickest ways is to order one of those travel converters that allows you to convert 220 to 110. They sell on Amazon form $30 USD and up. Probably on-line elsewhere as well.Otherwise you could build yourself a step down transformer or buy one.

You may need to open it up and see if there's any way to rewire it, but it's risky since there's no information on how to do this. Personally, I would rather return it, or request them to send another, since it will cost a lot to return.

You could use a step-down transformer, but keep an eye on it, and always unplug from mains after use, because some of the low-cost ones run hot, and you don't want that to become a fire hazard.

Thanks, I opened it up but there is no voltage change switch or anything mentioned inside. I'm guessing, they have specifically designed it (the transformer inside) for 110V AC. Unfortunately, this was a grand prize winning of over 5000 USD and most of the items they shipped are rated for 110V. 

This power supply,  MULTICOMP PRO Rework Station (MP740131) and MULTICOMP PRO Soldering Fume Extractor (MP740146)
all arrived with 110V AC rating. 

So far, the best possible solution for me would be to contact Hackster and ask what can be done. I don't think test many prizes can be replaced
Or will have to buy a voltage converter. 

 rsjawale24 It looks to be an Owon SP Series DC Power Supply.  https://www.owon.com.hk/products_owon_sp_series_1_ch_dc_power_supply

As you have already determined, the power supply doesn't look like it can be rewired.  It looks all electronic.  The power converter will probably be the fastest and most cost effective solution.

Yes, it is OWON rebranded power supply. 
Yup, that seems to be best and cost effective solution. 

The hot air rework station will require a large transformer : (

Not sure of a solution, unless the heating element can be replaced, which may cause all sorts of other complications if the rest of the unit isn't designed for that.

I'm hoping most of your prizes can be switched to  240V and it's just these ones you've listed that have the issue?

Yes, the hot air rework station is high power (1kW hot air gun).
Other prizes are fine. Only the three I mentioned above have the voltage issue.

I already have a Keysight triple output programmable power supply so anyway this would been a secondary supply. 

But I don't have a rework station. I think I can still make the soldering station part work with a low power voltage converter as it comes separately in the rework station. 

was there any numbers on the transformer

could you identify the primary wires 

do you have photos of top and bottom of board 

Still puzzles me how the Avnet companies keep on keeping on making that mistake. While international sales of electronics is the core business. I tend to get devices with a US plug.

You could use an external 2:1 step-down auto-transformer to provide 110V AC to the PSU from your 240V AC mains supply. They have a tendency to hum slightly and the regulation isn't too good on the smaller ones. On the up side you don't need to make any changes to the PSU, so it won't affect any guarantees or warranties. The main problem with supplying an answer to this particular problem is that the photograph of the back panel is slightly blurred which makes all the legends and labels difficult to read to say the least. I don't know what the 9-way 'D' connector is for, nor do I know what the rectangular connector underneath the ratings table is for, the one that looks like an old-fashioned printer input socket. A close-up clear photo of the ratings table would be very useful, as would one of all the wording above and to the right of the yellow 'danger' label.