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Lenovo Yoga YT3-X50F Tablet: Charging Socket Replacement Issue, Smoke & Short-Circuit

hcn 8973 11
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  • #1 17083971
    hcn
    Level 10  
    Posts: 139
    Rate: 17
    Hello,

    I wanted to replace the charging socket in the tablet as above. I guess the tablet charging worked before trying to replace it (only the socket was a bit broken). After purchasing the part, it is - a USB board with vol + / vol- buttons on the flex and connected to the tablet, smoke flew out, probably from the connector (photo 3). Then, when I disconnected them from the board, it was short-circuited and it was warm after connecting the power supply. It seems to me that the plug was poorly made and it had a short circuit (I attach a photo). I was looking at connector no.3 under a microscope and there is nothing wrong with it (I attach a photo). I got the second plate, everything looks nice, because the charging LEDs are on and even the tablet shows charging so much that it is not charging. As I measured the voltage at points 1.2, it does not increase after connecting the charger. Maybe a fuse has flown or something, maybe I will fail, someone will find someone willing to fix it?

    Colleagues suggest something ?? ?

    Lenovo Yoga YT3-X50F Tablet: Charging Socket Replacement Issue, Smoke & Short-Circuit Lenovo Yoga YT3-X50F Tablet: Charging Socket Replacement Issue, Smoke & Short-Circuit Lenovo Yoga YT3-X50F Tablet: Charging Socket Replacement Issue, Smoke & Short-Circuit
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  • #2 17084039
    pdemski
    Level 20  
    Posts: 248
    Help: 36
    Rate: 71
    In the middle photo you have a big babola, there is a short circuit on pins 2-3.
  • #3 17084063
    hcn
    Level 10  
    Posts: 139
    Rate: 17
    Yes, this is babol (listed), this is the plug I wrote about, now it's OK. Which does not change the fact that it does not land.
    -----------------------------

    I think I found the source of the problem now, how to fix / replace it ... is anyone willing? of course for money. Set of elements marked with number 4.

    Lenovo Yoga YT3-X50F Tablet: Charging Socket Replacement Issue, Smoke & Short-Circuit Lenovo Yoga YT3-X50F Tablet: Charging Socket Replacement Issue, Smoke & Short-Circuit Lenovo Yoga YT3-X50F Tablet: Charging Socket Replacement Issue, Smoke & Short-Circuit Lenovo Yoga YT3-X50F Tablet: Charging Socket Replacement Issue, Smoke & Short-Circuit Lenovo Yoga YT3-X50F Tablet: Charging Socket Replacement Issue, Smoke & Short-Circuit
  • Helpful post
    #4 17084313
    nutergsm
    VIP Meritorious for electroda.pl  
    Posts: 8429
    Help: 1031
    Rate: 1658
    hcn wrote:
    is anyone willing? of course for money.

    If you want to outsource it to someone, create an appropriate topic in the Bazaar section.
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  • #5 17084397
    hcn
    Level 10  
    Posts: 139
    Rate: 17
    nutergsm wrote:
    hcn wrote:
    is anyone willing? of course for money.

    If you want to outsource it to someone, create an appropriate topic in the Bazaar section.


    And how to fix it do you know?
  • Helpful post
    #6 17084618
    nutergsm
    VIP Meritorious for electroda.pl  
    Posts: 8429
    Help: 1031
    Rate: 1658
    You have to re-solder the damaged coil, and it's hard to say if anything else.
  • Helpful post
    #7 17085000
    gradek83
    Level 43  
    Posts: 9048
    Help: 925
    Rate: 2077
    pdemski wrote:
    great babola

    hehe, first I hear XD By definition it is a dry bullfinch from the nose, but the fact does not look nice. xD
    hcn wrote:
    I think I found the source of the problem now, how to fix / replace it ... is anyone willing? of course for money. Set of elements marked with number 4

    Return the system to the site about PLN 50 plus labor, if something more has not been awarded.

    Added after 1 [hours] 33 [minutes]:

    PS:
    ... there in the photo, if I'm not mistaken, you can see a coil with a ferrite core, and next to it there are particles as if a crushed varnish from a winding wire may burn this coil. Just out of curiosity, take a picture only from the side of this coil, not from above.
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  • #8 17085458
    hcn
    Level 10  
    Posts: 139
    Rate: 17
    gradek83 wrote:
    pdemski wrote:
    great babola

    hehe, first I hear XD By definition it is a dry bullfinch from the nose, but the fact does not look nice. xD
    hcn wrote:
    I think I found the source of the problem now, how to fix / replace it ... is anyone willing? of course for money. Set of elements marked with number 4

    Return the system to the site about PLN 50 plus labor, if something more has not been awarded.
    Added after 1 [hours] 33 [minutes]:
    PS:
    ... there in the photo, if I'm not mistaken, you can see a coil with a ferrite core, and next to it there are particles as if a crushed varnish from a winding wire may burn this coil. Just out of curiosity, take a picture only from the side of this coil, not from above.


    I will do tomorrow, thanks!
  • #9 17097143
    marnowak
    Level 15  
    Posts: 302
    Help: 1
    Rate: 3
    99.9% that the chip next to the coil also went.
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  • #10 17114029
    hcn
    Level 10  
    Posts: 139
    Rate: 17
    Hello,

    looking for

    charger 3585-2166 for this board, maybe my colleagues will tell me something.
    Or a way to get around it.
  • #11 18889234
    ArturoZacarias38
    Level 2  
    Posts: 2
    hcn wrote:
    Witam,

    poszukuje

    charger 3585-2166 do tej płyty, może koledzy mi coś podpowiedzą.
    Lub sposobu żeby go ominąć.

    Colleague the component is an ic 358s 2166, it can be replaced by the 358s that is in the samsung tab t210 t211, I also found it in samsung mega 5.8 i9150 but I'm wrong the model, what I can't find is the schematic of this lenovo
  • #12 19742275
    laszlovegh
    Level 2  
    Posts: 2
    Dear members! Can anyone help me to identify the part marked with amber circle. It seems that in our case that (diode?) is burnt, so we are unable to identify any part number etc.

    Can anyone support?

    Thanks!
    Laszlo from Hungary

    Lenovo Yoga YT3-X50F Tablet: Charging Socket Replacement Issue, Smoke & Short-Circuit
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Topic summary

✨ The discussion revolves around a Lenovo Yoga YT3-X50F tablet experiencing issues after a charging socket replacement. The user reported smoke emanating from the connector during the installation of a new USB board, which included volume buttons. Subsequent attempts to connect the power supply resulted in a short circuit and overheating. Community members identified a short circuit on specific pins and suggested that the damaged coil may need re-soldering. There were also mentions of a potential faulty chip (IC 3585-2166) that could be replaced with components from Samsung devices. The user is seeking assistance for repairs and component identification.
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FAQ

TL;DR: 99.9% likelihood points to the charge IC near the coil — “99.9% that the chip next to the coil also went.” Diagnose shorts, inspect the coil, and replace the 358S 2166 if needed. [Elektroda, marnowak, post #17097143]

Why it matters: This FAQ helps DIYers and repair techs quickly pinpoint and fix Lenovo Yoga YT3-X50F charging failures after port or board swaps.

Quick Facts

How do I diagnose a YT3‑X50F that shows charging but the battery doesn’t fill?

Measure battery rail at marked test points (e.g., 1–2). If voltage doesn’t rise with the charger connected, the charging path is open. Inspect the USB sub‑board, the inductor near the port, and the adjacent charge IC. LEDs can light even when charging is inactive. [Elektroda, hcn, post #17083971]

I connected a new USB board and saw smoke—what likely shorted?

A manufacturing defect or solder bridge can short connector pins 2–3. That short draws high current, causing smoke and fast heating. Remove power, disconnect the sub‑board, and inspect under magnification before further tests. [Elektroda, pdemski, post #17084039]

What is the 3585‑2166 (358S 2166) charger IC, and what can replace it?

It’s the tablet’s charging controller near the inductor. A reported substitute is the 358S from Samsung Tab T210/T211. Users also note the lack of a Lenovo schematic, so cross‑checking footprints is essential during repair. [Elektroda, ArturoZacarias38, post #18889234]

Do I need to rework the inductor near the charge IC?

Yes, if it’s heat‑damaged or lifted. “You have to re‑solder the damaged coil,” and then verify for additional faults. Replace it if readings are abnormal or the core is cracked. [Elektroda, nutergsm, post #17084618]

After a short, what else commonly fails in this tablet?

The IC next to the coil is the typical casualty. One expert reports a 99.9% likelihood that this chip also fails. Inspect and plan to replace both the coil and the charge IC. [Elektroda, marnowak, post #17097143]

How much should I expect to pay for the charger IC replacement?

Approximate part cost is PLN 50 for the IC, plus labor for board‑level work. Final price increases if other parts are burned or pads need reconstruction. [Elektroda, gradek83, post #17085000]

Can I bypass the charger IC to get it working?

The thread’s practical path is sourcing and replacing the correct 358S 2166 IC. No safe or documented bypass is provided. Technicians perform like‑for‑like replacement instead of bypassing charging control. [Elektroda, ArturoZacarias38, post #18889234]

How do I check if the connector had a pins 2–3 short?

  1. Inspect the connector under magnification for a solder bridge between pins 2 and 3.
  2. Use a multimeter in continuity mode across pins 2–3 to confirm a short.
  3. Replace the faulty plug or sub‑board before applying power again. [Elektroda, pdemski, post #17084039]

What tools do I need for board‑level repair on the YT3‑X50F?

Use a hot‑air rework station, quality flux, leaded solder, ESD‑safe tweezers, microscope, and a reliable multimeter. These enable safe removal and replacement of the inductor and charge IC with clean joints. [iFixit, 2023]

Where can I find someone to do the repair for me?

Create a request in the forum’s Bazaar section to outsource the job. Service offers and paid repair inquiries belong there per forum guidance. [Elektroda, nutergsm, post #17084313]

Is there a schematic for the YT3‑X50F charging section?

A contributor could not find an official schematic for this Lenovo. Identification relies on visible markings and known cross‑references during diagnostics and repair. [Elektroda, ArturoZacarias38, post #18889234]

What does a burned inductor look like on this board?

Look for a ferrite‑core coil with chipped varnish or debris resembling crushed winding enamel. That appearance indicates overheating and likely failure. Replace or re‑solder and retest. [Elektroda, gradek83, post #17085000]

I see a small “diode” near the port is burnt—what is it likely?

Near USB/charge inputs, designers add TVS/ESD protection diodes to shunt surges. A visibly burnt package suggests the protector sacrificed itself and needs replacement. [Littelfuse, 2020]

Does swapping the USB sub‑board always fix charging on the YT3‑X50F?

No. In the discussed case, a new board lit the LEDs, but charging did not start. Upstream power‑management components were damaged and required board‑level repair. [Elektroda, hcn, post #17083971]
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