Short circuit on XBOX controller - Model 1914.

[MarkC1970]

We have a XBOX 1914 controller that has shorted the 3V3 to J2 (aerial connector). If you unplug the aerial, the controller boots and connects. It seems stable without the aerial plugged in but it is not ideal.

The schematic is on https://www.acidmods.com/RDC/XB1/Sch...OME_VALUES.pdf

I have little to no understanding of these RF transmitters and so I am unsure what has failed. Currently, T2 is short on Pins 1 to 2 and RFF2 is also short on Pins 1 to 2. This is how the 3V3 is getting connected to J2, clearly one or both of these components are faulty. Any idea how this circuit is designed to work and therefore where the fault is?

I could order them both from AliExpress but I would like to know what is what with this little thing. Thanks.

[stj]

that may be normal,
check if the related ceramic caps are o.k. and none are shorted

[R_J]

I found this which refers to T2 (Balun) XBOX Series Controller 1914 SOC Board Marking T2 SMD Bluetooth Antenna Filter 2.4G – kasynparts maybe it is the cause of your problem?

This may be a part number LDM182G4510CC001 or LDM182G5005CC001
I have not tried these parts myself

[MarkC1970]

I found this which refers to T2 (Balun) XBOX Series Controller 1914 SOC Board Marking T2 SMD Bluetooth Antenna Filter 2.4G – kasynparts maybe it is the cause of your problem?

This may be a part number LDM182G4510CC001 or LDM182G5005CC001
I have not tried these parts myself

That site does further suggest that T2 is the problem here. I will track down a replacement and update this post later. Many thanks.