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Editado por Kyle Wiens —

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[* black] Logic board with shielding removed ([http://s2.guide-images.ifixit.com/igi/gOYCqydNCNKY2EPY|high res]).
[* black] Chip markings:
[* black] Texas Instruments TWL5030B 8CA28MWC
- [* black] Marvell chip under the silver EMI cover, marked W8686B12. It's a combo WiFi + Bluetooth package on a daughterboard soldered to the logic board.
+ [* black] Marvell WiFi chip under the silver EMI cover, marked W8686B12. Directly above it is the CSR bluetooth chip. They're both on a daughterboard soldered to the logic board.
[* black] Samsung SDRAM KMCMG0000M-B998
[* black] ELPIDA K2132C1PB-60-F 08510N060. There is clearly another BGA chip underneath this one, but we don't yet know what it is.
[* black] Unbrandedchips: 3335A ADJ RNX, 89A8 850
[* black] The top of the board is labeled 888-3 94V0 1 309 - F3. The bottom of the board is bereft of chips or markings, something Apple has never done.