标签: ipad平板电脑

  Step 1 — iPad Mini Teardown  ¶  What do you get when you cram an iPad into a smaller and lighter frame? 7.9" 1024 x 768 pixel (163 ppi) multi-touch display Dual-core A5 processor 5 megapixel rear-facing and 1.2 megapixel front-facing cameras Bluetooth 4.0 Lightning connector 16, 32, or 64 GB capacity  Step 2   Comparison time! With the introduction of the Mini, Apple now offers iDevices fit for any budget. Let's take a look at how they stack up. From bottom to top: iPad (3rd Generation) iPad Mini Slightly smaller iPad Mini—aka iPod Touch The iPad Mini has not one, but two speaker grilles to pump out mini beats. Don't let the iPhone 5's dual grilles fool you; the Mini is the first handheld iDevice to house stereo speakers.  Step 3  ¶  Few things get us more excited than finding a new model number on an Apple device. Though the new model number is only two off from the last iPad we tore down, we quite literally could not be more thrilled. Model Number: A1432. Fun fact: the year 1432 was a leap year! Apple's kerning on our iPad's serial number seems a little questionable. Did they have to squeeze in an extra digit at the last minute?  Step 4  ¶  No, it's not an iPad Halloween costume; it's the iOpener! The iOpener is our new iPad opening tool that softens pesky adhesive, allowing you to get inside without having to resort to our other iPad opening tool. Thanks to our trusty iOpener, a microwave, and half an hour's worth of time, the adhesive is warmed to the perfect temperature for us to free the glass/digitizer assembly to the spooky tune of our iFixit guitar picks. The iPad Mini continues Apple's repair-impeding practice of keeping iPads together with copious amounts of adhesive. This is one area in which the friendly-to-open Nexus 7 and Kindle Fire HD are clear winners.  Step 5  ¶  The touchscreen still functions with the glass separated from the LCD. We were pleasantly surprised that this round of glass removal was easier than previous ones, requiring less patience and a near-zero fear-factor. With the glass removed, we are ready to get at the guts of this pint-sized iPad (or gallon-sized iPod, depending on how you look at it.)  Step 6  ¶  So far it looks like Apple has more tricks than treats for us with a hidden screw securing the display. After dispatching two hidden screws and two exposed screws with our 54 Bit Driver Kit, we are able to lift the LCD. Pulling up the display reveals a large metal plate, held in with no fewer than 16 screws. We found similar plates in the iPod Touch 5th Generation, and the iPhone 5, so this seems to be a new iDevice design convention.  Step 7  ¶  Time to remove some metal. With the inner frame and the connector covers, there is enough metal here to forge at least two—maybe three—paperclips. All this prying and disconnecting is reminding us a lot of our recent iPod Touch teardown. But remember, the Mini and the Touch are, in fact, different devices.   Step 8  ¶  Our first exposed IC is one we've seen before, in the iPhone 5. In fact, you might say we've got a pretty close relationship with the Murata 339S0171 Wi-Fi module. More tricks, fewer treats! With plastic opening tool in hand, we disconnect the display connector, but there's still something holding the LCD in… Step 9  ¶  …and the culprit is found. Insulating tape holds the display to the rear case and protects the Lightning connector cable. With the tape peeled up, we remove the display assembly and can turn our attention to the interior. Bad news: due to the placement of connectors, you'll need to remove the LCD prior to removing the digitizer. Great news: the LCD and front glass are two separate components. This contrasts the fused glass-LCD assemblies in both the Kindle Fire HD and Nexus 7. Thanks for the repairability, Apple! Step 10  ¶  Peeling the tape and EMI shield off the display reveals the ICs controlling the 1024x768 unit: Samsung W1235 S6TNMR1X01 Display Driver Silicon Mitus SM4031 DA1232 SMCP043, Display PMIC 416R 8227 HDU 2YC 34 Though the markings on the back of the LCD don't turn up much information, the Samsung display driver IC reveals that Apple once again went with Samsung in its display manufacturing. Apple has reportedly been working to move away from Samsung as a primary supplier, so it's somewhat surprising to see a Samsung LCD inside. With that said, Apple often relies on multiple suppliers for a single component, meaning there's quite likely other LCD manufacturers lurking inside other iPad Minis.  Step 11  ¶  Fortunately, the iPad Mini inherited the connector-fastened battery from its larger sibling, not the soldered-in battery found in the iPod Touch. A plastic card makes a nice tool to pry the battery up from the rear panel, but it's still a very difficult task to break through all of the adhesive securing it to the rear case without puncturing the cells. A close-up of the battery connector exposes the numbers 821-1564-04 C 3312. Step 12  ¶  We get a good look at the battery, and find ourselves scratching our heads a bit. This is a 3.72 V, 16.5 Whr, 4440 mAh battery. Or maybe it's a 3.78 V, 16.9 Whr, 4400 mAh battery? Or maybe it's a 3.72 V, 4400 mAh battery? Or maybe, according to Apple's tech specs, it's only 16.3 Whr. Whatever the capacity, it's decidedly mini when compared to the massive 43 Whr battery in the iPad 3. Even the venerable iPad 2 sports a 25 Whr package, 50% more than the iPad Mini.  Step 13  ¶  Next off is the digitizer. Hiding on the connector are a couple of Broadcom touch controller ICs marked BCM5976C0KUB6G. This chip looks familiar…oh yeah, we saw them in the MacBook Air.  Step 14  ¶  An antenna sits on top of each speaker, presumably Wi-Fi and Bluetooth. Apple wasn't joking about "mini"; these are some of the smallest screws we have ever seen! For comparison, the screw on the right is from the bottom of an iPhone 5, where the screw on the left is from the Mini.  Step 15  ¶  The folks at Amazon doubted, but we can confirm the Mini does indeed sport stereo speakers. In this one regard, the Mini outdoes the still-mono Retina iPad. The reduction of connector size (30-pin to Lightning) has left just enough space to squeeze a second speaker into the device, allowing for sound quality that is anything but mini.  Step 16  ¶  Two hidden screws secure the Lightning connector to the rear case. They've been around less than two months, but Lightning ports are spreading like wildfire across nearly the entire iOS lineup. However, the iPad 2, iPhone 4/4S, and iPod Shuffle are still Lightning-less…for now. As badly as we want to completely remove the Lightning port ribbon cable, we will have to wait, as it appears to be soldered to the logic board. Step 17  ¶  We're getting ready to examine the brains of this device, but not before clearing out the rest of the surrounding peripherals. Several screws secure the power/volume buttons ribbon cable assembly to the rear case.  Step 18  ¶  The endless battle with adhesive rages on as we heat the backside of the rear case in hopes of loosening the adhesive securing the logic board to the rear case. Applying heat to an aluminum frame like this makes it too hot to touch—luckily we keep a silicone pot holder on hand just for this sort of thing. Once the adhesive is loose, we arm ourselves with a spudger to dislodge the logic board from the rear case.  Step 19  ¶  Unlike the iPad 3's dock connector, the Mini's lightning port is permanently soldered to the logic board. That design decision will make certain repairs very expensive.  Step 20  ¶  The A5 processor has 512 MB RAM, just like the processor in the latest iPod Touch. How do we know? The package markings E4064P3PM-8D-5 indicate the A5 has two 2 Gb, LP DDR2 RAM dies inside, according to Chipworks. These die photos from Chipworks shows the inner workings of the A5. Care to see the die in all its gory glory? Check out the high-res version.  Step 21  ¶  The top side of the logic board houses all of the ICs: Hynix H2JTDG8UD2MBR 16 GB NAND Flash Apple 343S0593-A5 Apple 338S1116 Cirrus Logic Audio Codec Fairchild PCHPS FDMC 6676BZ Fairchild BC7BE F0MC 6683 Apple 338S1077, aka Cirrus Logic Class D Amplifier (thanks Chipworks!)  Step 22  ¶  Strong adhesive continues to slow our advance, so another hit with the heat gun is prescribed to pry the headphone jack and front facing camera assembly out of the rear case. The iPad Mini does well in the camera department. While most hardware specs closely match the aging iPad 2, its cameras match those found in the the Retina iPad. Its front-facing FaceTime HD camera delivers 1.2 MP photos, and the rear-facing iSight camera delivers 5 MP resolution and HD video.  Step 23  ¶  iPad Mini 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, logic board, 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.