Question Need help identifiying components on Wii Motion Plus

[Part Time Commie]

Hello,
I got a lot of wii remote to repair and usually it's just a case of cleaning the corrosion, but I have this one Motion Plus remote that had so much corrosion on it that some resistances seems to have fell off.

I often check the LEDs' voltage on the positive side to see if the correct voltage is received and it's only getting 1.2V out of 3.2V. I assume it has some to do with the missing components but it's hard to tell with the little info I could find about those controllers. Best I got was some scans by a very helpful user here of the different layers.

I don't have another model to compare and figure out what's the value for the resistor I should use, so if anyone has some idea or another Motion Plus controller to compare.

I'd like to know the Ohm value for R15 which seems to link the sync switch to the positive rail and R61 which links that big capacitor and the chip under the black foam block to the positive rail.

If anyone has more info about Wii Remote repair and trouble shooting, I would gladly take it.

 

[Fidget Designs]

I went ahead and popped open a few of my controllers that I have laying around to see if I could grab those values for you, but none of them matched the layout of your controller. Do you know the RVL number of this particular controller?

 

[JamesPi]

I went ahead and popped open a few of my controllers that I have laying around to see if I could grab those values for you, but none of them matched the layout of your controller. Do you know the RVL number of this particular controller?

I believe the RVL number on all WiiMotes are the same. From my understanding, it is the "C/WR-40" that matters and changes for each layout revision.

 

[Part Time Commie]

Thanks a lot for taking the time to even crack one open (those tabs are quite annoying). I can't seem to find anything that could be a board revision number. Here are pictures of both sides of the board. The back of the controller says RVL-036

It might be possible to determine those if you can find that sync switch and the pin of that chip with a piece of foam on top that goes into a big positive rail.

 

[Fidget Designs]

Here are some images of my motion plus controller.
It looks like even parts have changed between the revisions of these two controllers. If you see any sections that you would like the value of, or just a closer picture I can go ahead and send that to you, but other than that I'm not sure if I can help you any further.

 

[Part Time Commie]

Damn, it is quite wildly different. It looks more like one of the many normal wii remote I have seen. I can't point out to another that could help, some chips seems to not even be present on your board. In any case, thanks a lot for taking the time to break one open.
I'll have to wait until I see a more similar one. Shouldn't be too hard, so many people forgeting batteries in their remote.

 

[Aurora]

Hey, just created an account as I've been searching for an answer myself. R15 measures (in-circuit) at 50k ohm.

Would be better to have taken the resistor out to measure, but it's my only good controller and I don't have a hot air rework station to reinstall. Too risky for me with just a soldering iron!

Hope it helps

 

[Part Time Commie]

Thanks for the info! So since it had been sitting on my desk for so long, I decided to wing it and be done with it. I got a 47k ohm for R15 and 30k something for the other. I got no life out of it. It was probably already dead due to the amount of battery corrosion.

 

[Ignominya]

I just ran into the realization that i have those exact same wiimotes, wich are different to the original wiimote circuit board im used to.

I bought a pair of these wiimotes from a Chilean game store store back in 2015-2016 for my Wii U, i bought them sealed. Yesterday I decided to open one of them because the gyro stopped working completely and i came to discover a very different board from the more familiar yellow PCB, the difference that struck me the most is the CSR bluetooth chip in the center, instead of a BROADCOM one (its way bigger), the layout is different too and mine had marker stains inside.

Since the outer shell is original, now I'm not sure if they were refurbished and swapped with generics or its just an official (cheaper) revision? With the marker stains and all... I'm not sure, either way it's the same one as your wiimote.

 

[Part Time Commie]

It does seem to be the exact same, thanks. The stain might be some signature from QA from the factory?

I personally have given up on this but I think @Aurora wanted to know some values. R61 I think?

 

[Aurora]

Right now I'm actually looking for what IC is located under the foam cube. I assume it is some sort of 10-pin qfn buck converter / voltage regulator, but the markings dont come up on google. Hoping it isnt proprietary.