Universal audio jack pinout

Question

I just acquired a Latitude 7400. I want to use its audio LINE input, Can anyone please tell me the exact pinout for its Universal audio jack (Headset Jack + microphone-in + line-in, it says in the 7400 manual+specs)? Or where to find it (I already spent hours trying to find this info).

ejn63 · Answer

It's a standard TRRS jack. Schematics here and elsewhere. https://www.cablechick.com.au/blog/understanding-trrs-and-audio-jacks/?srsltid=AfmBOorFlTGyuo7SXecXR0HK8fGyFRr2vWQVTVWCfVoN_qNwQ_viss6A

petervw · Answer

Thanks, I looked at it. But none of the drawings there showed a line input connection. I suspect my Universal Audio Jack is a 5-pole one, so TRRRS, maybe like this

as suggested in the 7400 manual. But even there no explanation of what contact is what function. Where can I find how to wire my plug?

Latitude

Universal audio jack pinout

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