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Changes to Step #21

Edit by Geoff Wacker

Edit approved by Geoff Wacker

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[* black] After removing the S1, we circle back to the display panel and find a lonesome chip:
[* red] Analog Devices [http://www.analog.com/media/en/Other/Support/Customer-Service/ADI_Export_and_Import_Classifications.pdf|AD7166|new_window=true] ARM Cortex M3-based Touchscreen Controller
[* black] With some careful tweezing, we pull up what appears to be an ambient light sensor.
[* icon_note] We're betting that this is one of Apple's new [http://www.google.com/patents/US20140152632|solar cell ambient light sensors|new_window=true]. This allows for the sensor to be '''behind''' the display panel, as opposed to the traditional surface-mounted design seen on the majority ofmost smartphones and tablets.
[* icon_note] We're betting that this is one of Apple's new [http://www.google.com/patents/US20140152632|solar cell ambient light sensors|new_window=true]. This allows for the sensor to be '''behind''' the display panel, as opposed to the traditional surface-mounted design seen on the majority ofmost smartphones and tablets.