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iPad Mini Retina Display Teardown

14 Nov

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While its big brother slimmed down, the iPad Mini put on a thin layer of winter fat to make room for its impressive new tech:

  • 7.9-inch, in-plane switching LCD with 2048 x 1536 resolution at 326 ppi

  • Dual-core A7 CPU with 64-bit architecture and 1 GB RAM

  • M7 motion-tracking coprocessor

  • 5-megapixel rear iSight camera with 1080p video; 1.2-megapixel 720p front-facing camera

  • 802.11n dual-channel MIMO Wi-Fi

  • 16, 32, 64, or 128 GB storage

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  • We like to start things off with a model number. Today’s contestant: A1489.

    • A unique model number for a unique device. Handy.

  • Apple’s high-end handhelds come in a fancy new color option, “Space Gray.”

  • We confirm Apple’s claim that the iPad Mini is (still) small enough to fit in one hand. Yep. What a handful.

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    Our Opening Kit ought to offer oodles of optimism to fearless fixers; iOpeners impart inroads into iPads. (Who doesn’t love a little alliteration?)

        We’ve never opened a iPad Mini with Retina Display before, but we’re confident this kit is up to the challenge.

    In this teardown staredown, the Mini blinks first: after offering up the usual gluey resistance, it succumbs and releases its front panel.

    The ridiculous amount of glue holding iPads together is no longer any surprise—but that doesn’t make it okay. Glue inhibits repair, and that is bad. Really bad.

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    We begin removing the titular update to this Mini: the Retina Display.

        All the pixels in the world couldn’t keep our Pro Tech Screwdriver Set at bay.

    Powering all those extra pixels comes at the price of 0.3 mm of added thickness in comparison to last year’s Mini.

        It just so happens that an extra 0.3 mm is also the difference between an iPad and the Kindle Fire HDX 8.9″, which, at just 7.8 mm thick, features an incredibly easy opening procedure, and a repairability score of 7 out of 10.

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    It looks like Apple has been doing some pruning. The 16 screws in the previous iPad Mini’s LCD shield plate must have been deemed excessive; we’re now down to seven screws.

        “Waste not, want not.” The same shields appear to be popped into the new Minis—they’re just missing some (now obsolete) screw holes.

    These LCD and digitizer cable connectors aren’t fooling anybody—tweeze away that bracket and pop off the connectors, and the LCD is home free.

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    Rumors abounded about problems sourcing the pixel-dense Retina display, slowing iPad Mini Retina production. That makes us extra-curious to get a look inside ours.

        Our little Retina has an LG display, powered by a Parade DP675 LCD driver, similar to the DP655 found in the iPad Air.

        Also present at the party, a TI TPS65143A and a pair of TI TPS65195, all likely LCD power supply ICs.

    While “mini” tends to denote added cuteness with compromised functionality, this Mini packs a resolution of 2048 x 1536—just like the Air.

        The same resolution in a smaller screen means enhanced pixel density—326 ppi on the Mini versus 264 ppi on the Air.

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  • With its worldly ties severed, the front glass/digitizer assembly practically floats away.

  • To the surprise of no one, we find affixed dual Broadcom BCM5976 touchscreen controllers—much like we’ve seen in a host of recent Apple products including the iPad Air and iPhones 5 and 5s.

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    • 3.75 V, 24.3 Whr, 6471 mAh—a huge bump over the 16.3 Whr battery seen in the previous Mini. It seems we’ve found the source of the Retina’s thicker skin.

    • In spite of those specs, Apple still pegs the battery life at 10 hours. We suspect the extra juice is being funneled into the swanky new display.

  • To fight the dark magics (well, adhesives) binding this battery, we call upon the awesome powers of the iOpener once more.

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  • If at first you don’t succeed, (heat and) pry, pry again.

    • The new dual-cell battery design means more edges with more glue, and requires more muscle to remove.

  • After quite a bit of said prying, we flip the grilled battery out of the case like a shrimp on the barbie.

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    While the new battery cools its jets, we work our way down the hit list of remaining components.

    First to go is the front-facing camera. This little bit of face-to-FaceTime is still rated at 1.2 MP, 720p, and is marked 821-1752-A.

    On the flip side, the usual 5 MP rear-facing camera.

        iPad camera specs seem to have plateaued for the time being. That’s fine by us, but it could prove disappointing for the dozens of people who enjoy tablet photography.

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  • Holy holes, Batman! What’s this? Wi-Fi-only Minis of yesteryear featured a blank expanse at the end of the logic board—just a flat space where the cellular chips would be in a CDMA/GSM version. This Retina Mini’s board has a nifty cutout instead.

    • Hopefully, this is a cool weight-saving maneuver by Apple, because the alternatives are scary.

  • Also making an appearance, the USI 339S0213 Wi-Fi Module, as seen in the iPad Air.

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    Who’s got the dip? We’ve got chips! Tasty, tasty, silicon chips (Disclaimer—Please do not consume microchips):

        Apple A7 APL0698 SoC—This is the same part number as seen on the iPhone 5s, as opposed to the iPad Air’s hotrod 1.4 GHz version

            Within the A7 package is Elpida F8164A1PD 1 GB LPDDR3 DRAM

        NXP LPC18A1 (Apple M7 Motion Co-Processor)

        Toshiba THGBX2G7B2JLA01 16 GB NAND flash

        B334 STMicro MEMS accelerometer/gyroscope, the same as seen in the iPad Air

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    More chips, because we love chips.

        Apple 338S1213 Cirrus Audio Codec

        Apple 338S1199—likely a pair of audio amplifiers, similar to the Apple 338S1077 found in the previous iPad mini

        Apple 343S0656-A1

            Per our good friends at Chipworks, this is likely a variant of the Dialog Power Management IC from the iPad Air

        Fairchild Semiconductor FDMC6676BZ and FDCM6683 MOSFETs

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    • iPad Mini Retina Display Repairability: 2 out of 10 (10 is easiest to repair).

      • The LCD and glass are not fused together and can be replaced independently.

      • The battery is not soldered to the logic board or other components.

      • Teeny-tiny screws can be easily misplaced if you’re not careful. Don’t sneeze too hard while taking them off.

      • Copious amounts of adhesive hold many components in place—front glass, battery, front camera, back camera, ribbon cables—making repair extremely difficult.

      • The Lightning connector is soldered to the logic board, so don’t bend its pins.

      • Hidden screws mean you’ll need to be very diligent when trying to remove internal components.

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    by ifixit

     
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    Posted by on 14/11/2013 in IT

     

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