|iPad Wi-fi Teardown|
|Step 1 — iPad Wi-fi Teardown|
It's here! We got our hands on Apple's newest toy, the iPad, and we can't wait to see what's in it. So we won't— let's do this!
Contents of the box:
Dock Connector to USB Cable
10W USB Power Adapter
The iPad measures in at 242.8 x 189.7 x 13.4 mm and weighs in at 1.5 lbs.
The significantly improved 9.7 inch LED-backlit glossy widescreen with Multi-touch is perfect for all your movie watching, e-book reading needs.
The iPad's model number is A1219, which doesn't mean much. But the 3G iPad is A1337, which is rather geeky, even for Apple.
Yes, we did turn it on—how could we not? But then we turned it right back off and started figuring out how to pry this beautiful machine apart.
iPad, meet iPod original.
More like: Flying saucer, meet horse & buggy.
The iPad stacked upon a MacBook Pro, stacked upon a Dell laptop.
Insert a metal spudger between the display and the rear case to pry the iPad open.
What an environmentally friendly device!
Arsenic-free display glass
Mercury-free LCD display
Recyclable aluminum and glass enclosure
Lift the display assembly away from the rear case.
A first peek under the hood reveals two huge Li-ion Polymer batteries taking up most of the space in this device.
Aaaand it's off. You have no idea how glad we are that this didn't require a heat gun.
Words from the wise: You might break some tabs getting the display assembly off.
Wow, what gorgeous symmetry.
The display assembly and rear case assembly are each 350g. Talk about 50/50 weight distribution.
The empty void in the upper right corner is where the cellular communications board will go in the 3G iPad.
The display has a marking referencing Honeywell patent #5280371.
It looks pretty barren, mostly because all the 3G equipment is missing.
The 3.75V, 24.8 watt-hour battery provides the juice for an advertised 10 hours of use. In contrast, the iPhone 3GS has a 4.51 watt-hour battery and the MacBook Air has a 40 watt-hour battery.
The USB power supply had to be enhanced specifically for the iPad. It's a 10W unit manufactured by Foxlink Technology, Ltd., part #A1357 W010A051.
Disconnecting the display data cable.
Removing these connectors is a two step process. You first have to flip up the locking bar (pictured) and can then slide the cable out of the socket.
The display data cable connector is the same style used in all of the new Unibody MacBooks.
Disconnecting the volume, power, and screen rotation lock buttons connector.
The main board is secured to the back panel by T4 Torx screws.
We have never seen Apple use screws with a bit this small before.
Top and bottom of logic board with the EMI shield on.
It looks like this board was made by AT&S. We haven't seen Apple's PCB manufacturers brand their boards before.
The logic board is about 4.5" wide, spanning about 60% of the iPad's width.
Remove the EMI shield from the logic board, and presto!
This board is markedly different than the pre-production board we uncovered.
Markings on the A4:
N26CGM0T 1007 APL0398 33950084 YNL184A2 1004 K4X2G643GE
Yes, the K4X2 is a Samsung DRAM part number!
Decoding the part number shows there is 2Gb of memory inside. This translates into ~128MB of memory per die, for 256 MB total. (NOT 512MB, as we previously reported.)
This means the A4 processor is probably being manufactured by Samsung.
The DRAM was stamped at the end of January, while the processor die was likely manufactured the third week of February.
A shot of the logic board minus the steel EMI shield.
The manufacturer of the memory has switched from Toshiba on the FCC teardown to Samsung on this device.
Samsung K9LCG08U1M 8 GB NAND flash.
We love how much easier Samsung's chip numbers are to interpret.
Broadcom BCM5973 I/O controller.
The Apple A4 is marked up much nicer than the part in the FCC photos from yesterday.
Texas Instruments CD3240A1 touch screen controller.
NXP: L061 01 4 ZSD950
A reverse shot of the logic board.
The gold strip on the curved edge most likely helps ground the board against the "steps" cut into the aluminum rear case.
Apple part #820-2740-A.
The Apple-branded IC on this side of the board is labeled 338S0805.
Removing the single screw securing the dock connector cable to the rear case.
Notably lacking from this RF/data cable is anything GPS related. Check out the FCC iPad teardown to see where the GPS will be in the 3G device.
The 802.11n WiFi/Bluetooth card is integrated into the dock connector cable.
Hiding under the case:
Broadcom BCM4329XKUBG 802.11n WiFi + Bluetooth 2.1 + EDR and FM
Dont worry, the capacitor near the lower right corner of the Broadcom chip didn't come that way. The solder melted and it moved when we heated the steel casing to remove it.
|Step 20 |
The speaker assembly is larger than we expected:
|Step 21 |
That's a hulk of a battery: it weighs 148g with the casing.
|Step 22 |
The iPad battery is a lot bigger than an iPhone 3G battery. The iPhone battery has about 1/5th the capacity provided by the iPad battery.
|Step 23 |
The bare rear case. The antenna behind the apple logo looks just like the antenna on the new iMacs.
|Step 24 |
Here's a detail shot of both WiFi antennas. The wireless reception should be decent with such dense antennas.
|Step 25 |
Remove a couple screws and pull the headphone jack out of the rear case.
|Step 26 |
Ants on parade? Nope, just the T4 Torx screws holding each tab to the display assembly.
|Step 27 |
Disassembling the display assembly.
|Step 28 |
The ambient light sensor lives in a compartment that a camera would love to call home.
|Step 29 |
The display seems to be glued around its perimeter but can still be removed from the plastic framework.
|Step 30 |
Some front glass/digitizer part numbers.
|Step 31 |
Peel back the sticker, and more part numbers can be seen near the bottom of the LCD.
|Step 32 |
As always, the final layout shot.