Repairing / Fixing a Milwaukee M12 Multitool (M12-FMT) 

Thank you!

😂😂😂😂Thanks 👍

Thanks, at the time of making this one I don't think I was set up for multiple cameras or even knew how to do multiple cameras in the video editing software.. I am getting better at it 😂😂

Thanks. I was using heat on some other boards and have some acetone. So might give it another try.

Thank you! Got a few more milwaukee repairs and other stuff in the pipeline!

Thanks👍.. musical instrument 😂😂

@@BuyitFixit It kinda sounds like an electric Kazoo...🤣🤣

Thanks I've got a fair collection now. I'll fixed quite a few different tools, and I've got some other tools to look at soon 👍

Thanks Davieque👍

Thank you kindly sir.

Yes mate, hot air rework station.

Sorry but microcontrollers come unprogrammed. They are basically a computer on a chip that you can program to do whatever you like. If you bought one and just soldered it in. It would not know how to control the rest of the circuit. The pins can be programmed for input or output.

Hey how would you no what to program the microcontroller too? Thanks

I think the motor controller failed then blew the track, although the original chip wasn't getting hot or anything but it was giving weird output waveforms. I was a bit worried about the 10 packs from Aliexpress because I've had fake chips from that site before when fixing the Samsung washing machine about 3 years ago.

@@BuyitFixit could we get a shot of probing the chip for waveforms on your next encounter with a view of the oscilloscope. That's a tool I need to acquire at some point

@@ianhelsbyservices yes. I need to either work out if my scope saves video or just stills or set up another camera. That's why it didn't make the final edit as I didn't have another camera set up. I'll try to get stuff like that in shot next time I have a repair that requires it.

@@rayvalen249 Hi Ray. You can see the old and new chip with the numbers on the video at 12:10. It's a A4915METTR-T from Allegro MicroSystems. Hope that helps.

Hi Wayne, hope this helps.. www.aliexpress.com/item/1005001790711274.html

What do the battery indicator lights do? Do they flash in any type of pattern?

Hard to say as I think they do brushed and brushless versions. Really hard to diagnose something without seeing it or more information.

@@BuyitFixit it's the MILWAUKEE M18 FDG-0 FUEL 18V LI-ION REDLITHIUM BRUSHLESS CORDLESS DIE GRINDER, best way I can describe it is you can flick it on and off a dozen times and it won't work but if you twist the chuck end then try turning it on it will usually fire up, it's quite bizarre

@@Kaburn2000_YT it could possibly be one of the mosfets blown (the 6 chip type things you see me test near the start) if one had gone open circuit it may still run but not quite right. And you may need to turn it manually to start as you say.

It would be like a 3 cylinder running on 2 cylinders

@@BuyitFixit I'm with you, I'll have to take it apart and have a look, thanks

Thanks for that👍. I think it's just an error indicator that the motor isn't turning or 'something went wrong'

@@BuyitFixit I'd imagine a shorted mosfet could also do something similar?

@@procrastinator1842 yep, although om this one it was the motor driver chip that controls the mosfets that had failed.

@Buy it Fix it yeah I saw that. Just not sure how the brain box knows that the driver has sharted...

It's in the contact page on RU-vid

@@BuyitFixit Unfortunately, I can't see your contact

@@mikoajburzynski6651 it's on the main channel page next to the community tab but I'll post it here too. buyitfixit@outlook.con