Inside Nexus One

Today I fell on my Nexux One Android Google-phone. Before I cry myself a f*cking river, I’ll show you what’s inside.

I fell pretty bad, on a small rock, and my leg hurts like a bitch. Looks like I was lucky that the phone got in between me and the environment.

This is where the rock went:

Nexus One Dent

And this is how it affected the display:

Nexus One with a cracked display

Needless to say, the device didn’t boot. Step by step I started to strip it.

Back of Nexus One

This is nothing fancy, just the back cover and battery removed. You can however make out the shapes of some of the components underneath, which was not the case before the accident.

Back of Nexus One, part two

Here I removed the thin foil in the middle and the top cover. You can see the camera, white LED (flash), audio jack receptacle, also some quartz crystals. On the other side of the top module:

Top reverse of Nexus One

there’s two-color LED (charge state and so on, cool thing that I miss on Nexus S), light sensor (display brightness) and kind of proximity sensor as well (used for detecting when you hold the phone to your ear, to dim the display and turn of the touch screen).

There’s lots of the shielding, as you’d expect for such amount of sensors and radios (WiFi, Bluetooth, GPS, multiband GSM radio, not to mention the good old 480MHz of USB 2.0 and 1GHz CPU):

Back copper shield of Nexus One

The lower part looked like this:

Lower back side of Nexus One

Nothing much, apart from the micro-usb receptacle, part of the SIM socket. With the shells removed we finally have some guts:

Mainboard of Nexus One, RAM side

That’s a 512MB Samsung RAM (KA1000015M-AJTT) right there, and if you’ll look closer you will notice the lower right part corner deflects light at a different angle than the rest – it’s cracked. That’s first of two fatal injuries I was able to find. On the other side of the board is the CPU:

Mainboard of Nexus One, CPU side

1 GHz Qualcomm QSD 8250 Snapdragon ARM. A closer reveals the other fatal injury:

1 GHz Qualcomm QSD 8250 Snapdragon ARM of Nexus One, cracked

Also the lower right part is chipped. At least I know it did not suffer long. A vigilant observer will also notice an Atmel Atmega88V, in QFN version. It probably serves as a GPIO and serial buses (I2C, SPI) interface for the bigger CPU next to it, or perhaps as an external watchdog.

Last thing is the track ball:

Nexus One Trackball

Interestingly enough it looks like it’s readout is magnetic – I would expect these four little things to be Hall-effect sensors. The shiny metal in the middle is a push-button for “selecting” when the track ball pushed down. To give you an idea of where it fits, here is an under-view from before the disassembly:

Under the Nexus One

Well, I guess this sums it all up. One Android phone less.

Nexus One mixed nuts

I was going to name this blog “bits and pieces” and I guess it’s the right caption for the last photo.