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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: pinouts.ru/Slots/USB_pinout.shtml - It could be something like you see here: pinoutsguide.com/DigitalCameras/olympus-c70z_pinout.shtml - SH could stand for shell, which is a GND connection. –  MaQleod Oct 18 '12 at 20:36
    
This could probably be migrated to electronics.stackexchange.com for better results. –  ioSamurai Oct 18 '12 at 20:39
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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 electronics.stackexchange.com. –  Francesco Zanini Oct 18 '12 at 20:47

1 Answer 1

up vote 2 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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