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Giiker Cube Repair for Repeated Out of Sync Issues

The Giiker Supercube Smart Speed Cube Goes by many names and brands. You have probably seen “Supercube” (APP), “Xiaomi”, “Mijia” and other names associated with it. It is a bluetooth enabled cube that connects to an app to allow all sorts of cool features for cube solvers. One issue we found after spending a few weeks with ours (the “i3” version of it that comes with the orange headphones) was that it started to develop “out of sync” issues. It got to the point where it couldn’t get through a single solve without becoming “unsynced”. It’s not difficult to “reset” the cube in the app, but when it is happening mid-solve, it makes many of the cool functions of the app enabled cube useless.

So, the following is how we fixed ours. It is now back in sync and not having issues “for the time being”. We drew from information available by u/EQMOD here but also found our cube had issues that were not addressed there.

DISLAIMER: We are not electronics professional and only have basic proficiency with soldering and electronics repair. This is for your information only and swiftcubing.com will not be held responsible for any damage you cause to your giiker cube whilst attempting repairs. In saying all that, we were able to repair our cube and do hope you find these steps useful if you do choose to take your own risk in attempting a repair.

Stuff you will need.

  • Methelated Spirits / Rubbing Alcohol
  • Some cotton buds on a stick.
  • A soldering iron & a small amount of solder
  • A pair of tweezers or something similar to hold quite small wires during the soldering / de-soldering process.

Step 1 – Disassemble the Giiker Cube

This includes removing the little caps on the center pieces, which will expose the small sensor board mechanism underneath.

Each Center Cap needs to be removed to access the sensor electronics for cleaning.
This is what your core should look like once disassembled

Step 2 – Work out which sides are having issues

You can do this by twisting them while the cube is synced with the app. Twist each side and where it doesn’t turn in the app you know there is an issue. Once I found which sides were having issues I put a small mark on the white core of the cube so that I could quickly find them for repairing. You may like to skip this step and just work on every side of the cube if you are looking to give it a “service” of types.

Using the core to discover which sides

Note: When trying to find sides that are not working correctly we found that there were 2 different issues causing them not to work.

  1. The Sensor pad needing cleaning
  2. The Spring / sensor fingers are sliding on each other rather than turning as one as they are designed to do.

The way to tell which is the problem for the side you are investigating is the way that it feels as the site is rotated. If it feels like it is spinning without much resistance at all, then it is probably the spring issue. If you can feel a bit of resistance (like a friction / scratching feeling a bit) then the mechanics are all still in check, and it is probably just the sensor board needs cleaning.

Our cube had 2 needing sensor cleans and one where the spring wasn’t tight enough in the black center housing and so was sliding instead of letting the sensor spin.

We will show a basic possible fix for those two issues in the steps below.

Step 3 – De-solder the 2 wires from the sides you want to fix / service.

When de-soldering it is good to have a way to mark the position that you have de-soldered the wire from, and the wire you just de-soldered. This is to ensure you get it back to the right place. We started using a very small amount of white acrylic paint on a pin tip to mark the wire and the place I de-soldered it from. We only marked one wire of a two wire set so we knew which was which.

The Two Wires – desoldered so that the sensor board can come off for cleaning.

Note that the centre pieces that charge the Giiker Cube have extra desoldering to do. It has a metal disk that goes over the whole center piece that needs to be desoldered (We only removed one edge and very gently bent it upwards (it did feel like it would be quite easy to snap off doing it this way, so it may just be better to desolder both edges. It also has an additional wire to desolder.

This is the sensor board setup for the charging center pieces. One side has been unsoldered and bent up to expose the 3 wires underneath which also need desoldering to detach the sensor board.

Step 4 – Unclip the Sensor Board from the Core

In order to get the sensor board off for cleaning, we needed to unclip it from the core by turning it 90 degrees and applying light upward pressure to get it off once rotated. The small white round bit in the center is the very top of the core plastic, and the larger white rounded corner rectangle is part of the sensor board that needs to be rotated before it will come up.

The sensor board and sensor fingers pieces are what will come up when the center pieces are desoldered and uncliped correctly.

It is also a good idea to place the pieces taken from each side in batches together to avoid mixing up the parts of various sides.

Step 5a – Repair : Clean the Sensor Board

For the sides that need a sensor clean. We used a cotton bud with some mentholated spirits (or rubbing alcohol would also work) to gently rub over the copper tracks.

Methylated Spirits
Note the dark / discolored bands on the copper tracks here that needed cleaning.
This is a half cleaned one to show the difference between a cleaned (the bottom) and uncleaned section (the top).

Step 5b – Repair : Adjust Spring

The way the cube functions is for the black centre pieces and the white pieces with the sensor fingers on it to form one connected piece via a connecting spring. That whole unit (the black center piece, the white piece with the fingers and the spring) all then spin together on the long thin white plastic core.

If the spring is spinning inside the black center piece housing or the white piece with the fingers on it, the sensor fingers wont rotate as the center piece rotates and the rotation wont register in the app.

In order to stop the spring from slipping we used a very small pair of needle nosed pliers to very very slightly bend out the very bottom of the spring metal and very top spring metal. This meant that when it is pushed back into its housing on the black and white pieces it stopped sliding and allowed it to form one unit and rotate on the white spindle instead.

These are the three parts that are meant to form one rotating unit but sometimes due to the spring being too loose in the black housing or the white housing, they don’t and the spring needs to be made to fit more tightly.

Step 6 – Reassemble and Resolder Pieces

Once you have cleaned or adjusted the springs for each of the sides that needed it, it is time to reconstruct each of the center pieces back together the way they came off. This will involve threading the black center piece on the white spindle, (making sure to be gentle as you feed the wires through), putting the spring and white sensor fingers back on, then following the reverse procedure for the clipping mechanism but pushing it through and rotating it back the 90 degrees to lock it back in place.

We made sure we followed our markings to solder the same wires back to the spots where they were soldered initially.

Step 7 – Test within App

Open the Supercube app back up and test to see if you have fixed each center piece by turning it 90 degrees, it should register as turned in the app if you have cleaned, fixed springs and soldered everything back together correctly.

Step 8 – Put Cube Pieces back together

While you are in the app, take note of where each of the colored caps should go back on the cube and put them back on.

Make sure you put the caps back on the correct sides. Use the cube state in the app to help you.

Put all the other pieces back together around the core The magnets help it stay together nicely, but starting from the bottom and working your way up is probably best.

Step 9 – Resync App to solved cube and test again.

Also while you are in the app, reset the cube back to a solved state so that it is all synced up ready to use.

Hopefully it will stay in sync as you mess it up like ours does now!

A synced up GIIKER cube after we messed ours up again.

I hope that has been helpful information for you in potentially getting your Giiker cube working correctly again.

Swift Cubing everyone!

Don’t have a Giiker Cube or want another one? Why not purchase from Amazon using the link below.

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