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Hello guys,i have a strange problem..... when i plug any antenna cable in connector of black circle then T2(in red circle) is getting shorted and hot so it stops working....Any idea how can i fix it? I suspect ARM....Controller is working with antenna's connector unplugged J2 but it cant be connected wirelessly....
It's an RF Transformer, and no idea on the specs. A donor board is the only place to get one that will work, as long as it's not bad as well.
Here's a good 20+ more, all with different specs, that also 'look' like it. Have to have more to go on than just the package to get the proper replacement. https://www.digikey.com/en/products/filter/balun/849?s=N4IgjCBcpgbFoDGUBmBDANgZwKYBoQB7KAbRACZYB2cmkAXQIAcAXKEAZRYCcBLAOwDmIAL4FYATgQhkkdNnxFSIACwAGCQGYtDZm0iceA4SLEgArNKZQwza5HLnTQA
Not a fix, that's just a test. The actual issue is still there. The trace from Q3 to R10 could be open, R10 could be bad, the trace from R10 to J3p6 could be open, bad solder joint at J3. Then if all of that is good, the issue is on the bottom board somewhere. J5p6 bad solder joint, then that goes to the SOC board pin 14, then on the SOC board it goes to a Resistor then to the MCU.
Already gave you advice on where to get the correct part from.Nowhere at all in either of your links does it say those are for the XB1 controller, so your logic ladder is already missing a few rungs there. Everything else is speculation and guessing based on where you found it, what it looks like and what you are assuming. I also never said it wouldn't fit, fact is there are over 20 parts that will 'fit' there, and plenty more that aren't even a Transformer or Balun that will also 'fit' there, doesn't mean they are the right part based on what it looks like and where you found it. @ Qball - Good deal.
All of those Resistor values are in the MCU Board schematic in the first post.
My Schematic* of the MCU Board - https://www.acidmods.com/RDC/XB1/Schematics/XB1_1914_BOTTOM_BOARD_NOVALUES.pdf...* Information will be updated when/if I get them scoped and/or figured out. NOTE: The MCU Board values are not currently in the schematic. The thing seems to be pretty similar to the 1708 and most of those values should match up.
C21 is on the 1.8v rail for decoupling, you can toss just about anything in there from 100nF to 1uF, or leave it off.
Not blind, that was on me, I thought this one here was up to date but I must have added those in and didn't update this one. They're in there now.