Hi good morning, I am a decent electronic repairman myself, and have had to get even better with modern electronics and kids. Have replaced numerous parts on my switch-lites for my kids but looks like this repair (and probably the same on 3 other affected units) is definitely more technical.
Some back story, we own 4 switch-lites, and one by one they started going down because the kids wouldn’t stop using a certain charger(yes i took it away, if you have kids you’ll understand this one). Normal troubleshooting produced no results so after sitting for a few months i finally got around to opening one up, did some poking around on the charging circuit and while plugged in and 5v at the plug, no voltage present on the battery, i assumed the internals of the battery were toast so i purchased a new battery(larger mAh as well), got it hooked up today and viola! The unit powered up…only to be met with 2101-0001. So after a deep dive into what all that means, i have a short at M32T36 pin/capacitor 38&29 only. I have looked and looked and cannot seem to find what these capacitors control? Also, i came across a video where the tech guy said that the unit would run without these capacitors installed…not saying thats a good idea but is that true?
The usb-c port looks fine, no bent pins from what i can see, so i’m just wanting to make sure all of my bases are covered before i go through purchasing the stuff required to replace the M92(chip, flux, heatgun)
They dont control anything, caps there do inductance decoupling or noise filtering.
Are you sure the short caused by the capacitor, have you remove the cap or m92t36 finding out what exactly caused short on the pins? FYI, caps are required from design but you could temporally test new chip without the cap present.
Best way to make sure port and pins are good is measuring continuity of each pin with type-c port breakout board. In some case, eyes tell different story from the reality of internal short on the port
I have not removed either the capacitors or the M92 chip, I’m just at the testing phase now, trying to get a better understanding of the components and their function before just doing stuff.
Since M92T36 is custom made no public release datasheet, you could learn more details from M92T30 chip instead, most design and feature are same
Okay i’ll keep that in mind. Any ideas or common issues that would cause these two to go bad?
Is there any way to force the boot past the 2101 error screen?
I thought your 1st post story has been self-explained. Any uncontrolled surged voltage/current from VCCIN would lead to internal circuit misbehavior/short. There are only few connections from charge port into M92T36, so I could only image LDO pins internal short caused from charge port