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I have a replacement of the internal USB camera for the laptop Acer Aspire 5750G. AFAIK USB has only 4 connections (5V, D+, D-, GND). On the PCB of the camera I noticed there are 5. They are labeled: 3.3V, D+, D-, GND and SH. Does anyone know what is "SH" connection for? It seems that it's just connected to GND but I'm not sure. Can anyone help me? Thank you.

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Not sure, SH is not in the USB specs: - It could be something like you see here: - SH could stand for shell, which is a GND connection. – MaQleod Oct 18 '12 at 20:36
This could probably be migrated to for better results. – ioSamurai Oct 18 '12 at 20:39
Cut open any USB cable you have lying around. You will find five connections. – David Schwartz Oct 18 '12 at 20:46
I think it's shield (or shell) ground connection, it makes sense. Thank's for the answers. I didn't know about – Francesco Zanini Oct 18 '12 at 20:47
up vote 3 down vote accepted

Most likely it is a shield ground.

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Thanks for the answer. – Francesco Zanini Oct 18 '12 at 20:47

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