Xiaomi Air 12 Notebook - PennEngineering · PDF file Xiaomi Air 12 Notebook has ultra-thin,...

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Transcript of Xiaomi Air 12 Notebook - PennEngineering · PDF file Xiaomi Air 12 Notebook has ultra-thin,...

  • © 2017 www.pemnet.com 1 1

    Xiaomi Air 12 Notebook

    June 5th, 2017

    Xiaoming Chen

    PennEngineering®

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    Overview

    2

    Xiaomi Air 12 Notebook has ultra-thin, full-metal design, edge to edge glass coverage, a

    sleek appearance, lite up keyboard, and ultra-light weight design featuring the latest

    hardware. The Notebook is extremely portable and can be carried around effortlessly

    making it a perfect laptop to carry.

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    Details & Findings

    Pictures and Description of the

    Xiaomi Air 12 Notebook and the

    Disassembly Process.

    3

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    Xiaomi Air 12 Notebook Teardown

    Step 1: Power off Xiaomi Air 12 notebook.

    4

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    Xiaomi Air 12 Notebook Teardown Step 2: Removing bottom case

    Xiaomi Air 12 Notebook uses eight M2x3.3 (circled in Pink), CD finish with shoulder screws to secure

    the bottom case. In the middle of the bottom case on the right side, one screw is under the a rubber foot. We pry

    the bottom case with a pick or plastic card and then slide the pick by the edges until removing the bottom case

    completely.

    5

    The screw details are as below

    • M2 x 3.3 mm overall length

    • 3.65 mm head diameter

    • 0.3 mm head thickness

    • 2.3 mm shoulder diameter

    • 0.4 mm shoulder length

    • Nylon locking patch

    • #4 Phillips drive

    • CD finish

    • Flat head

    • 400 series S/S

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    Xiaomi Air 12 Notebook Teardown

    Step 2: Removing bottom case

    The below pictures show the CD finish, shoulder screw geometry.

    6

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    Xiaomi Air 12 Notebook Teardown

    Step 2: Removing bottom case

    The below picture and schematic diagram illustrate joining structure for the molded-in brass inserts.

    7

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    Xiaomi Air 12 Notebook Teardown Step 3: Separating speaker modules

    We disconnect the flex cable before removing the two speaker modules. Total four molded plastic

    tapered pins position the two speaker modules, two pins for each speaker module.

    In this step, no mechanical fasteners, adhesive involved in the joining.

    8

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    Xiaomi Air 12 Notebook Teardown Step 4: Removing battery

    Total four black oxided M1.8 screws used to hold the battery secure. The M1.8 screws (circled in Pink)

    on the left side go through the holes and then through the threads in the brass inserts illustrated on slide #11. The

    M1.8 screws circled in Red in the middle go through the holes in a stainless steel made battery cover and then

    through the threads of the standoffs illustrated in slide #12.

    9

    The screw details are as below

    • M1.8 x 2.75 mm overall length

    • 4.3 mm head diameter

    • 0.51 mm head thickness

    • Nylon locking patch

    • #0 Phillips drive

    • Flat head

    • Carbon Steel + Black Oxided

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    Xiaomi Air 12 Notebook Teardown Step 4: Removing battery

    Two flat head M1.4 screws with plastic washers are used to hold the battery. The screws (circled in

    Blue) attach on the standoffs illustrated on slide #13.

    10

    The screw details are as below

    • M1.4 x 1.9 mm overall length

    • 5.0 mm head diameter

    • 0.48 mm head thickness

    • Nylon locking patch

    • #0 Phillips drive

    • Flat head

    • Carbon Steel + Bright Nickel

    The washer details are as below

    • O.D.: 4.85mm

    • I.D.: 2.40mm

    • Thickness: 0.8mm

    • Plastic

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    Xiaomi Air 12 Notebook Teardown Step 4: Removing battery

    The below pictures illustrate joining structure for the two black oxided M1.8 screws used.

    11

    Black oxided screws on the left side

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    Xiaomi Air 12 Notebook Teardown Step 4: Removing keyboard cover

    The following designs represent the joining structure for the two black oxided M1.8 screws used. The

    standoff illustrated below is made of carbon steel with Bright Nickel plating.

    12

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    Xiaomi Air 12 Notebook Teardown Step 4: Removing keyboard cover

    The below pictures represent joining structure for the two flat head M1.4 screws with plastic washers.

    The standoff illustrated below is made of carbon steel with Bright Nickel plating.

    13

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    Xiaomi Air 12 Notebook Teardown

    Step 5: Removing battery cover

    The battery cover stamped with 0.2mm stainless steel panel and secured by eight snap fits with large

    clearance between the male and female snapping elements.

    In this step, no mechanical fasteners were used.

    14

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    Xiaomi Air 12 Notebook Teardown Step 6: Removing hard disc drive

    One M1.4 flat head screw secures the hard drive on the aluminum alloy chassis with the threads inside

    the standoff (circled in Pink) illustrated below.

    15

    The screw details are as below

    • M1.4 x 1.95 mm overall length

    • 5.1 mm head diameter

    • 0.45 mm head thickness

    • Nylon locking patch

    • Machined

    • #0 Phillips drive

    • Flat head

    • Carbon Steel + Bright Nickel

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    Xiaomi Air 12 Notebook Teardown

    Step 6: Removing hard disc drive

    The following picture and schematic diagram illustrates joining structure for the flat head M1.4 screw

    used. The standoff illustrated below is made of carbon steel with Bright Nickel plating.

    16

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    Xiaomi Air 12 Notebook Teardown Step 7: Removing the motherboard

    Total eight flat head M1.8 screws (circled in Pink) are used to secure the motherboard. Six of the

    screws go through the holes in the circuit board and then attach on the brass inserts illustrated on slide #18. The

    remaining screws (in the middle) go through the circuit board and then attach on the standoffs clinched into sheet

    metal beneath aluminum chassis as shown on slide #19.

    17

    The screw details are as below

    • M1.8 x 2.7 mm overall length

    • 4.3 mm head diameter

    • 0.5 mm head thickness

    • Nylon locking patch

    • Machined

    • #0 Phillips drive

    • Flat head

    • Carbon Steel + Black Oixded

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    Xiaomi Air 12 Notebook Teardown

    Step 7: Removing the motherboard

    The following pictures and schematic diagrams illustrate joining structures for the flat head M1.8 screw

    used. The insert illustrated below is made of brass with Silver coating.

    18

    6x Black oxided screws around the side

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    Xiaomi Air 12 Notebook Teardown

    Step 7: Removing motherboard

    The following pictures and schematic diagrams illustrate joining structures for the flat head M1.8 screw

    used. The standoff illustrated below is made of carbon steel with Bright Nickel plating.

    19

    2x Black oxided screws in the middle

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    Xiaomi Air 12 Notebook Teardown

    Step 8: Removing touchpad

    Three M1.8 flat head screws are used in the touchpad secure. The screws go through the holes itself and

    then into the threads inside the molded-in brass inserts illustrated on slide #21.

    20

    The screw details are as below

    • M1.8 x 2.65 mm overall length

    • 4.4 mm head diameter

    • 0.5 mm head thickness

    • Nylon locking patch

    • Machined

    • #0 Phillips drive

    • Flat head

    • Carbon Steel + Black Oixded

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    Xiaomi Air 12 Notebook Teardown

    Step 8: Removing touchpad

    The following picture and schematic diagrams illustrate joining structures for the flat head M1.8 screw

    used. The insert illustrated below is made of brass with Silver coating.

    21

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    Xiaomi Air 12 Notebook Teardown