What is this part on mainboard?
Xperia c6603
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Xperia c6603
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it is a small shield that covers some small resistors/capacitors.
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you can see in the picture that on this one it is missing
Thanks, this is very helpful for me. Is this piece necessary for the efficient work?
Head phone jack flex cable connector.
Probably this part:
https://www.amazon.com/Cable-Headphone-C...
See step#15 of this guide: Sony Xperia Z Motherboard Replacement
and #18 of this guide:
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