Teardown of the Acer / Microsoft “Mixed Reality” VR headset

I wanted to see whats inside the new Acer VR headset that my company (Packet39) received a few days ago. So I took it apart and documented the process.

IMG_20170804_161531

Velcro comes off, then 6 small screws. Then the plastic “face cover” detaches, and the headband with it.

 

 

 

The two lens holders (or maybe protectors, as they don’t actually hold anything) pop off. Four more screws and then another plastic cover comes off (not easily though).

 

 

 

Now the IR proximity sensor and audio jack are exposed.

 

 

 

One more screw and the audio jack comes out.

 

 

 

Four additional screws and the LCD+lenses module comes off. I didn’t open that one, because they are usually hermetically sealed and I don’t have a clean room to put it back together. The LCD module is connected to the main board by two ribbon cables, and the IR sensor is the third.

 

 

 

Back side of the main board, and the QR code / serial number.

 

 

 

 

The two cameras, each have their own ribbon cable and a fancy cable protector. I peel off the shielding but there is no label on the camera itself. Sadly, I still have no idea what kind of cameras these are. Each camera has a flat and flexible heatsink glued to the back, that extends to the sides of the headset.

 

 

 

There is nothing else in the headset, no additional sensors or emitters.

 

IMG_20170804_163813

 

Here is the front side of the main board, with some closeups on the chip numbers. I haven’t looked these up yet, if you know what they do please comment on this blog post.

IMG_20170804_163911

 

 

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Everything was put back together in reverse order without much difficulty. Headset still works, so great success. I hope you find this useful.

13 thoughts on “Teardown of the Acer / Microsoft “Mixed Reality” VR headset

  1. Thanks for the teardown! I’ve tracked down the main chips on the front side of the board. I’m pretty sure the back side of the board is mostly incidental power circuitry, but I’m only an armchair electrical engineer.

    CYUSB3304
    Cypress USB 3.0 hub.
    http://www.cypress.com/documentation/datasheets/cyusb330xcyusb331xcyusb332xcyusb230x-hx3-usb-30-hub

    STM32F103C8
    ST ARM Cortex-M3 74MHz microcontroller (includes USB capabilities)
    http://www.st.com/en/microcontrollers/stm32f103c8.html

    LIFMD6K
    Lattice LIF-MD6000 FPGA Probably used to combine the stereo cameras into one CSI-2 image stream but it could also do some image processing.
    http://www.latticesemi.com/Products/FPGAandCPLD/CrossLink.aspx

    CYUSB3064
    Cypress CSI-2 to USB bridge controller.
    http://www.cypress.com/documentation/datasheets/cyusb306x-ez-usb-cx3-mipi-csi-2-superspeed-usb-bridge-controller

    ALC4040
    Realtek USB audio chip.
    Not listed on Realtek’s site

    ANX7678
    Analogix SlimPort Probably an hdmi to display port converter.
    Not listed on the Analogix site

    ANX7530
    Analogix SlimPort Display port receiver. Analogix made this chip for VR. It outputs to two displays.
    http://www.analogix.com/en/products/dp-mipi-converters/anx7530

    25Q80DVSIG
    Winbond 8Mbit serial flash memory.
    http://www.winbond.com/resource-files/w25q80dv_revf_02112015.pdf

  2. This headset uses Cypress CX3 Programmable MIPI CSI-2 to USB 3.0 Camera Controller IC (CYUSB3064) and Cypress HX3 USB3.0 Hub controller (CYUSB3304) .

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