At the beginning of this year, the Macbook product line was updated with Force Touch. The touchpad with two-level pressure sensing has greatly improved the operating experience. The iPhone 6s/6s Plus released later also uses 3D Touch. In the process of looking forward to the stars and the moon, it is finally the turn of Magic Trackpad 2 to update the Force Touch function. In addition to Force Touch, the new Trackpad also adopts the design of rechargeable lithium battery. It uses Lightning interface for charging, and no need to replace the battery. Now let's follow in our footsteps to see how Magic Trackpad 2 is different from the previous generation.

The new Magic Trackpad 2 has a larger size than the previous generation. It is 6.3 4.52 0.43 inches (160.0 114.8 10.9) in three dimensions. Its width and height are higher than those of the new Magic Keyboard. The two can be used in harmony.

The back of the Magic Trackpad 2 has a power switch, a Lightning connector and an unknown plastic strip. In addition to charging, the Lightning interface also plays the role of pairing with the Mac.

Magic Trackpad 2 and the new Magic Keyboard can be used together perfectly.

Compare with the old model. The area is much larger than the old model, and the surface color is lighter.

Because the new lithium battery is used for power supply, the AA battery compartment does not need to be reserved, and the thickness is also reduced.

Magic Trackpad 2 adopts the design of glue bonding. First, we heat the surroundings of the Trackpad bottom plate to soften the glue for easy disassembly.

Use the blade to pry out the gap slowly along the side gap.

Then pry the bottom plate along the periphery of the panel with a pick. We can see a lot of glue.

After removing the bottom plate, you can see the internal structure. In addition to glue, there are several magnets inside to fix the base plate.

The Trackpad battery looks very similar to the iPhone battery at first. This is a 3.78V 7.65Whr, or 2024mAh lithium-ion polymer battery.

We began to disassemble the other parts. Remove the T3 screw that secures the Lightning connector.

Unplug the flat cable of the Lightning interface to take out the Lightning interface.

Lightning interface module.

The circuit board is also fixed by T3 screws. Unscrew the screws and pull out several flat wires to remove the main board.

Let's take a look at the chips on the motherboard:

• Red: Broadcom BCM20733 Bluetooth 3.0 single-chip solution

• Orange: STM32F103VB 72 MHz 32-bit RISC ARM Cortex-M3 microcontroller

• Yellow: NXP 1608A1 charging IC

• Green: TI BQ24250C single input I2C/Satandalone Switch Mode lithium ion charger

• Light blue: Intersil's ISL656A two-phase power supply controller

• Dark Blue: International Rectifier IRFH3702 N-channel HEXFET Power MOSFET

Use a crowbar to slowly pry off the Tapetic Engine module. Similar to the Force Touch function on Macbook, the panel of Magic Trackpad 2 cannot be pressed down. The touch feeling of clicking is derived from the vibration generated by the Taptic Engine, rather than the traditional contact switch.

The appearance of this Taptic Engine is very similar to that of Retina Macbook Pro.

The touch panel is glued to the four metal spring pieces on the middle frame. We use a blade to separate the glue.

Remove the touch panel.

There is only one chip on the back of the touch panel. The model is Broadcom BCM5976 touch control chip.

The four metal spring pieces on the aluminum alloy middle frame are installed with a pressure sensor (Chain gauge), which is connected to the main board by a flat cable.

When you press the touch control board hard, the metal spring will produce a deformation tension pressure sensor, which works together with the Taptic Engine through the mainboard. This is how the Force Touch function is realized.

Well, today we have finished the disassembly of Magic Trackpad 2, and finally we have a family photo. IFixit gave the Magic Trackpad Generation 2 3 points (10 points is the easiest to repair). Like other Apple products, Magic Trackpad 2 is also difficult to repair. A large amount of glue makes it very difficult to disassemble and repair it.

(Source: iFixit， Translation: 91 disassembly)

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