> For the complete documentation index, see [llms.txt](https://open-rt.gitbook.io/open-surfacert/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://open-rt.gitbook.io/open-surfacert/surface-rt/hardware/j14-oem-debug-connector.md).

# J14 OEM Debug Connector

Inside the device is a OEM connector labeld J14 that probably served as development and debug access for components of the device.

## How to access J14

Open your device according to this IFIXIT Guide:

<https://de.ifixit.com/Teardown/Microsoft+Surface+Teardown/11275>

![https://www.techrepublic.com/pictures/cracking-open-the-microsoft-surface-with-windows-rt/26/](https://2395005476-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MJQb34R_xPz0ll0scbM%2F-MJRDGFsnXSDAflU2rec%2F-MJRDM1Lgs3bXoLED7FK%2Fsurface_windows_rt_teardown_027.png?alt=media\&token=458982a5-cc03-4dba-9848-84c1aeb49fd1)

The pads are coated with a solder mask. The solder mask can be removed carefully with a sharp object.

{% hint style="danger" %}
Be careful you don't want to cut any traces. This could damage and destroy your device!\
Pad size is **0.5mm**
{% endhint %}

![J14 Connector on Mainboard of SurfacRT - taken from https://arstechnica.com/gadgets/2012/10/under-the-surface-ifixit-breaks-down-microsofts-tablet/ and upscaled](https://2395005476-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MJQb34R_xPz0ll0scbM%2F-MJR81GQB3u6N95hSVcJ%2F-MJR9o2Ggzth2rkQBLCT%2FJ14.png?alt=media\&token=9c9e0f27-b12b-474f-bb23-323fc19d23fc)

## J14 Schematic

If you can identify some pins feel free to update this Schematic template

{% file src="/files/-MJRFOXooqWtC4V3mXJh" %}
SurfaceRT-J14-Schematic
{% endfile %}

![](https://2395005476-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MJQb34R_xPz0ll0scbM%2F-MR1Dm9Eig0kocRb5kdO%2F-MR1z54-3Qo6D1gdfG3b%2Fimage.png?alt=media\&token=59dee952-ba52-4f86-92e3-5df504e35dff)