How to change the voltage on a FLSUN QQ


I just bought a FLSUN QQ and the instructions say I need to change the voltage from 220 to 110. Sadly the instructions don't say how to do that. Can anyone tell me how to do it?


Posted 2018-04-24T05:03:01.530

Reputation: 1 169

@Linuxdan Are you saying you had to unscrew the bottom to get to the switch? I have a Sunlu and the manual is horrible. I thought this was a switch to push in to move left to right.picture 1picture 2picture 3

– Danny Blaq – 2020-05-31T13:45:37.323

@DannyBlaq yes, the switch in this case was on the side of the PSU which is in the base of the printer. – linuxdan – 2020-06-01T15:18:10.750

What is your problem? some power source has an auto detect to switch from 220v to 110v. – Fernando Baltazar – 2018-04-24T06:07:14.810

please attach a photo - that will help to help you – profesor79 – 2018-04-24T11:29:32.960

@profesor79 what would you like a photo of? – linuxdan – 2018-04-24T20:15:55.887

1the best will be the psu label – profesor79 – 2018-04-24T22:28:29.607

1@linuxdan the psu is the power source, is the part that is connected to the wall socket. may be is inside the bottom of your printer. – Fernando Baltazar – 2018-04-24T23:42:36.037

I took some pictures last night of the components near the plug, but the main one I got decent pictures of was the power board for the heated bed. Will try again tonight. After researching online, it seems like I'm looking for a big metal box similar to a desktop computer power supply... – linuxdan – 2018-04-25T21:05:28.120



I don't know if this is the case with all FLSUN QQ printers, but mine was indeed set to 220v as the instructions/user manual indicated. First I needed to remove the bottom of the printer. Then there was a switch on the side of the power supply with the following label:

voltage switch label

I know the picture is terrible, but the lighting inside the base of the printer was less than optimal. It should be pretty easy to find once you know what you're looking for.


Posted 2018-04-24T05:03:01.530

Reputation: 1 169

My FLSUN QQ 2020 was exactly what linduxdan said, except it was 115v / 230v printed on the power supply. Thanks! – ZStoneDPM – 2020-07-09T22:23:20.807

1Thanks to @professor79 and Fernando Baltazar for their comments that got me looking in the right place. – linuxdan – 2018-04-26T06:39:39.097

Very nice to come back and answer your own question. Please accept your own answer after the waiting period. From Help Center: "You can also accept your own answer, but you must wait 48 hours to do so. After all, someone else may come along with an even better solution to your problem!" I doubt there will be a better answer as you investigated yourself. – 0scar – 2018-04-26T06:52:57.433

@linuxdan well done!, mostly power supply has this kind of switch. – Fernando Baltazar – 2018-04-27T21:31:05.967