Xiaomi Mijia 1C Robot Vacuum Cleaner - PART 1 - Complete Fix for Sudden Shutdown Issue - Disassembly
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- Опубликовано: 29 сен 2024
- This is the first part of fixing the Xiaomi Robot Vacuum Mijia 1C (STYTJ01ZHM), which with a fully charged battery turns off within a few seconds after starting cleaning if it is in Strong or Turbo mode. This video contains the total disassembly of the vacuum cleaner and the removal of the motherboard, on which it will be necessary to replace the electronic component causing the mentioned problem.
... In the following days (when I find free time for it), I will replace the problematic electronic component, reassemble the vacuum cleaner and of course document it all ... and hope that the problem will be solved. ;-)
Thank you! I made it too. Now it’s better then ever. I used the 4A PTC and it’s good enough. The original smd part was 3.3A rated.
I'm glad it helped you ;)
So the original part is a pptc 3.3A Hold and 5.5A trip? I want to replace the fuse to an as close as possible to the original, so i would like to know for sure before ordering.
A weak battery is not causing this problem. I bought a new battery before I replaced the fuse and that didn't help. In the event of a low battery, the robotic vacuum cleaner can return to the charging station in time. A faulty fuse will cause a very rapid voltage drop, so that the vacuum cleaner does not have time to return to the base and immediately switches off.
In my case it was the internal dust filter! But help me dissamble! Thanks
Isn't this problem caused by a weak battery?
And
Will it continue to work when we do this even if our battery is low? Because my battery life is at 70%
I changed my battery. It still shuts down. Now im ordering a new mainboard and hope it will work.
Dude you forgot to clean the engine and it's filters. That solved the problem for me. Maybe xiaomi was clever and calculated the fuse exactly to the point, where the engine needs to much ampere course it's full of dust but not overheating. So the fuse protect the engine damaging it's self by to much dust inside.
The dust filter was clean and so was the engine. That wasn't the problem. After replacing the fuse, the vacuum cleaner works as before.
Hi Tomás:
First of all congratulations for the video, very clear and easy to follow.
I came here to watch your video and comment because I have the same problem as you. After a few minutes the vacuum suddenly shut down.
I couldn't find any error or message coming out of the machine (as a voice error) either in the app.
I was afraid of open it, so I bring it to a technical support near by my place. The guy told me that he connected the vacuum to a computer and it showed up an error message related to a wheel engine. He tried to order the piece, but he couldn't (but I'm afraid that he wasn't sure enough about the problem and he doesn't want to spend his time on it). Also he told me that the battery was already very used and it needs to be changed. The final solution that he gave to me was to send it directly to the Xiaomi official technical support service by mail (because is in another town). The main inconvenience was that I would never know how much it's gonna cost.
So after this "introduction" here they come my questions:
-Could you tell me if any message related with a wheel engine appears in your case?
-What do think about the idea of changing the fuse that you changed and it doesn't works, will this affect if I found the real problem in the future?
- Would you be so kind to order the next solutions in terms of priority: change the wheel engine, change the fuse, change the battery?
Thanks a lot for spend your time not only repairing things but showing to the world how to do it.
Best wishes,
Juan.
Hi Juan, in my case I changed the batteries first (I took apart the original one and replaced the original 18650 type batteries with new ones), but the problem with the vacuum cleaner suddenly turning off continued. Then I started measuring the voltage away from the battery connector and found a large voltage drop right at the fuse (which means a large fuse resistance). After replacing it, the vacuum cleaner works without problems as before. It is possible to find out if the problem is in the fuse by bridging it without having to dismantle it (using soldering to connect both ends of the fuse with a piece of wire). But this cannot be done without disassembling the vacuum cleaner.
I would like to add that bridging the fuse is only for a short-term fuse test, and in case of confirmation of a defective fuse, it must be replaced with a new one. It is dangerous to use the vacuum cleaner without a functional fuse due to the risk of fire!!!