Tools Featured in this Teardown

Introduction

Welcome to the future of watch evolution. The Pebble E-Paper Watch is the "first watch built for the 21st century." It can track your bikerides, display your text messages, and even tell the time! We had no choice but to bust the Pebble open and see what made it tick.

Update: We did not initially find hardware evidence of Bluetooth Low Energy support, but the engineers at Pebble got in touch to clarify things. Their RF module does in fact support BLE, and they assure us that a firmware update to support this feature is forthcoming.

Waste no time! Head on over to Twitter to follow us for the latest teardown news.

This teardown is not a repair guide. To repair your Pebble, use our service manual.

Image 1/2: The watch will connect to your smartphone (iPhone or Android) via Bluetooth, bringing alerts of incoming calls, emails, and texts to your wrist. Image 2/2: But what type of hardware is responsible for powering the Pebble? These are the tech specs listed:
  • A pebble is a small rock often thrown into ponds or lakes. The Pebble, on the other hand, is a smartwatch fueled by internet-connected apps and unlimited innovation.

  • The watch will connect to your smartphone (iPhone or Android) via Bluetooth, bringing alerts of incoming calls, emails, and texts to your wrist.

  • But what type of hardware is responsible for powering the Pebble? These are the tech specs listed:

    • 144 x 168 pixel display black and white e-paper

    • Bluetooth 2.1+ EDR and 4.0 (Low Energy)

    • Vibrating motor

    • 3-axis accelerometer with gesture detection

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Image 1/2: It is waterproof up to 5 ATM (50 meters or 165 feet), making it wearable while washing dishes, playing sports, and swimming in shallow water. 'Where is it not wearable?' you ask. Image 2/2: Probably not [http://www.youtube.com/watch?v=LTCSgMFdZEM|here|new_window=true]. Certainly not [http://www.youtube.com/watch?v=CrFMyXMa3aw|here|new_window=true]. And most assuredly not [http://www.youtube.com/watch?v=_-wS6mqQzMs|here|new_window=true].
  • The rear side of the Pebble is adorned by lovely, gold-colored writing.

  • It is waterproof up to 5 ATM (50 meters or 165 feet), making it wearable while washing dishes, playing sports, and swimming in shallow water. 'Where is it not wearable?' you ask.

    • Probably not here. Certainly not here. And most assuredly not here.

  • To protect the Pebble from water damage, the front portion is tightly fitted with a clear plastic frame and sealed tight.

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  • For a watch with no visible outer screws, your first question is probably something along the lines of, 'Hey iFixit, how do you open that which cannot be opened?'

    • Our response: 'With the help of our iOpener, of course!'

  • With more than a little heat and some clever prying, we hope to outsmart the world's smartest watch.

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  • Pebble employs tons of adhesive to keep water—and tinkerers—out. Add in a bezel around the screen, and it's impossible to separate the cases without compromising the display.

    • Update: Pebble changed to a screw-down watch back toward the end of 2013, simplifying DIY repair.

  • With plenty of elbow grease and our iSesamo, we get our proverbial foot in the door and start prying this Pebble open.

  • We manage to part the cases, leaving the stubborn smartwatch in only slightly better condition than if we had bombarded it with actual pebbles until it popped open.

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Image 1/3: It may seem like we just added this step to play with our HexBright (another Kickstarter project we're big fans of). If you thought this, you were correct. Image 2/3: It may seem like we just added this step to play with our HexBright (another Kickstarter project we're big fans of). If you thought this, you were correct. Image 3/3: It may seem like we just added this step to play with our HexBright (another Kickstarter project we're big fans of). If you thought this, you were correct.
  • The screen may be busted, but it still makes a pretty rad display with the help of some HexBright backlighting.

  • It may seem like we just added this step to play with our HexBright (another Kickstarter project we're big fans of). If you thought this, you were correct.

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Image 1/2: The display is capable of maintaining its current image with very low power draw (less than 15 μW for a static image, according to the manufacturer). Image 2/2: Peeling up the Pebble's e-paper display film reveals backlight LEDs. The small display only requires three LEDs (controllable by a wrist gesture) to light its face.
  • While there is no exact definition for what makes a display technology e-paper, it essentially entails paper-like readability in ambient light and very low power draw. The Pebble makes use of a new Sharp Memory LCD that puts it in the realm of e-ink and e-paper.

  • The display is capable of maintaining its current image with very low power draw (less than 15 μW for a static image, according to the manufacturer).

  • Peeling up the Pebble's e-paper display film reveals backlight LEDs. The small display only requires three LEDs (controllable by a wrist gesture) to light its face.

As they stated in their press conference, you are referring here to e-Ink, which is NOT the same as e-Paper!

Ryan Adler - Reply

Image 1/2: So much for the tech gore you've come to expect from our teardowns. There's not much here to eviscerate: the Pebble innards are housed in a single simple assembly, boxed within a light plastic frame. Image 2/2: So much for the tech gore you've come to expect from our teardowns. There's not much here to eviscerate: the Pebble innards are housed in a single simple assembly, boxed within a light plastic frame.
  • Now, we eviscerate the Pebble.

  • So much for the tech gore you've come to expect from our teardowns. There's not much here to eviscerate: the Pebble innards are housed in a single simple assembly, boxed within a light plastic frame.

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Image 1/3: The cable's adhesive also secures the backlight guide, allowing the LEDs to [http://youtu.be/0SqFPNTBnv8|shine on|new_window=true], providing backlighting for the e-paper screen. Image 2/3: We learned in our [guide|9301|Nook Simple Touch with GlowLight|stepid=36033] teardown that light guides work by bouncing light shined in one end through a diffraction grating to provide an even glow—in this case beneath the e-paper display. Image 3/3: We learned in our [guide|9301|Nook Simple Touch with GlowLight|stepid=36033] teardown that light guides work by bouncing light shined in one end through a diffraction grating to provide an even glow—in this case beneath the e-paper display.
  • Just a swish and a flick of the spudger and the lone ribbon cable surrounding the whole assembly is freed.

  • The cable's adhesive also secures the backlight guide, allowing the LEDs to shine on, providing backlighting for the e-paper screen.

    • We learned in our Nook Simple Touch with GlowLight teardown that light guides work by bouncing light shined in one end through a diffraction grating to provide an even glow—in this case beneath the e-paper display.

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Image 1/3: Since the cable houses all 4 buttons, 3 LEDs, and the Bluetooth 2.1 antenna, replacing an individual component will be impossible (even if you can somehow get inside without compromising the display). Image 2/3: Since the cable houses all 4 buttons, 3 LEDs, and the Bluetooth 2.1 antenna, replacing an individual component will be impossible (even if you can somehow get inside without compromising the display). Image 3/3: Since the cable houses all 4 buttons, 3 LEDs, and the Bluetooth 2.1 antenna, replacing an individual component will be impossible (even if you can somehow get inside without compromising the display).
  • Removing the ribbon cable from the main assembly gives us a closer look at the buttons and Bluetooth antenna on one side, and the backlight LEDs on the reverse.

  • Since the cable houses all 4 buttons, 3 LEDs, and the Bluetooth 2.1 antenna, replacing an individual component will be impossible (even if you can somehow get inside without compromising the display).

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Image 1/3: Much like the ribbon cable, three components make up this assembly, held together by very delicate soldering. If any one of them fails (most significantly the battery), they will all need to be replaced as a single unit. Image 2/3: Much like the ribbon cable, three components make up this assembly, held together by very delicate soldering. If any one of them fails (most significantly the battery), they will all need to be replaced as a single unit. Image 3/3: Much like the ribbon cable, three components make up this assembly, held together by very delicate soldering. If any one of them fails (most significantly the battery), they will all need to be replaced as a single unit.
  • Removing the backlight guide panel from the device grants us access to the motherboard/battery/vibrator assembly.

  • Much like the ribbon cable, three components make up this assembly, held together by very delicate soldering. If any one of them fails (most significantly the battery), they will all need to be replaced as a single unit.

It seems that there is also some glue(hot melt?) to mechanically stabilize the connection in addition to the solder!?

Maltman - Reply

Does anyone where the light sensor is located?

Yiqian - Reply

The 'light sensor' is in fact the backlight LEDs, as LEDs can be used to generate small amounts of power when exposed to light. #TMYK

jordanagray93 -

Image 1/1: Micron [http://www.micron.com/~/media/Documents/Products/Data%20Sheet/NOR%20Flash/Serial%20NOR/N25Q/n25q_32mb_1_8v_65nm.pdf|N25Q032A11ESE40F|new_window=true] 32 Mb serial flash
  • The ICs of interest on the top side of the motherboard are as follows:

    • Micron N25Q032A11ESE40F 32 Mb serial flash

    • STMicroelectronics STM32F205RE high-performance ARM Cortex-M3 MCU, with a maximum speed of 120 MHz

    • STMicroelectronics LIS3DH 3-axis accelerometer

    • Oscillator

    • Texas Instruments BQ24040 1A Battery Charger

    • Xtrinsic MAG3110 3D Digital Magnetometer

The magnatometer chip is from Freescale Semiconductor : Xtrinsic MAG3110 Three-Axis, Digital Magnetometer

jiga - Reply

Do you know what the other chipsets are? The ones labeled NXE, NXT 26J PCL3, 343 3959, 2KR?

Ashwin Vijayakumar -

NXE is TEXAS INSTRUMENTS's CELL CHARGER bq24040.

Sam Chan - Reply

NXT 26J PCL3 = TI TPS62562 1.8V Buck Converter

mjdrake - Reply

Image 1/2: After some dainty desoldering, the module's EMI shield is removed to surprisingly reveal a slightly different  [http://www.ti.com/lit/ds/symlink/cc2560.pdf|Texas Instruments CC2560A|new_window=true], that [http://guide-images.ifixit.net/igi/LwajShMkmY1VprEK|appears to not include BLE support|new_window=true]. Image 2/2: The Bluetooth antenna printed into the flex circuit board connects to the pan1316 BT module here.
  • The back of the motherboard hosts a Panasonic pan1316 RF module, promising the Pebble's advertised Bluetooth and Bluetooth Low Energy (BLE) functionality, powered by a Texas Instruments CC2564 Bluetooth Controller.

  • After some dainty desoldering, the module's EMI shield is removed to surprisingly reveal a slightly different Texas Instruments CC2560A, that appears to not include BLE support.

  • The Bluetooth antenna printed into the flex circuit board connects to the pan1316 BT module here.

  • Word on the street was that Pebble had BLE functionality just waiting to be activated with a firmware update, but we can't find evidence of the hardware to back up this hidden potential.

  • Update: Pebble assures us that the update will be forthcoming, and explained that TI uses the same silicon for both the CC2560 and CC2564 parts—so despite the label on the chip, the update will make this a CC2564 with BLE support.

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Image 1/1: This seems like a challenge to us, but with the use of e-paper, we believe that even heavy use would allow for such long battery life.
  • The Fullriver battery is rated at 3.7 Volts and 130 mAh. According to the GetPebble website, the battery is rechargeable via included USB charger, and lasts for over 7 days on a single charge.

    • This seems like a challenge to us, but with the use of e-paper, we believe that even heavy use would allow for such long battery life.

Hi. Heavy-usage Guy here. Two day battery life. :(

Tom Loiacono - Reply

That section in the lower left of the board looks like a component was removed from the production design. My guess it was another sensor type that didn't work out.

filderhoff - Reply

2KR = TI TXB0104RUTR ( Link : http://www.ti.com/product/txb0104 )

N9t Recker - Reply

343 3959 1225 :- AC chip ( Authentication Chip )

N9t Recker - Reply

The 1225 marking is the package type (SOT1225)

InverseSandwich -

Thanks, I agree with you InverseSandwich

N9t Recker - Reply

I didn't get any information on IC marked "CKT" ..... Any iDEA ????

N9t Recker - Reply

Image 1/2: In keeping with the über tight waterproofing, the buttons have gaskets to allow for motion without leakage. Image 2/2: If you break one of the buttons, it can be replaced individually from the others; however, you still need to get into the watch in the first place, a feat we have not yet mastered.
  • Just to be thorough, we go ahead and pop out a couple of the Pebble's spring-loaded buttons.

  • In keeping with the über tight waterproofing, the buttons have gaskets to allow for motion without leakage.

  • If you break one of the buttons, it can be replaced individually from the others; however, you still need to get into the watch in the first place, a feat we have not yet mastered.

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Image 1/1: In lieu of a numeric score, we'd like to list a few of our repairability and durability findings:
  • Smartwatches might be the next big thing, but—right now—the Pebble is a unique device. We don't have a repairability metric for a watch…yet.

  • In lieu of a numeric score, we'd like to list a few of our repairability and durability findings:

    • Low power consumption decreases the frequency of charges, increasing the battery life.

    • Watch band is a standard size and easily replaceable.

    • Inaccessible battery limits life of the device to 6-10 years (by our estimates).

    • It is impossible to open the device without destroying it or at least compromising its waterproofing, making internal repairs infeasible.

  • We got in touch with Pebble's design team and voiced some concerns about end-of-life recycling. We were happy to learn that they currently have a plan in the works for a responsible recycling program for dead Pebbles.

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9 Comments

Anybody knows what are the other ICs on the "Step 11" screenshot?

Alex Rahlis - Reply

you need to redo the guide, the new pebble are much easier to open

https://www.dropbox.com/s/agan4tgr1j58tw...

Fabio - Reply

hye fabio.. can the screen take out easily on your open pebble

fadzliezsix -

I got a replacement Pebble due to screen problems, and the device that's arrived (May 2014) says in the "About" section that it's "Hardware V3R2" and what's more it has 4 torx screws on the back, that the original did not have. Has anyone tried to take this model apart (I'm not going to as it's my only working one)?

Oh, sorry Fabio, just seen your image!

BenS - Reply

does anybody know where to buy Vibration Motor Replacement for Pebble?

birkoffkeren - Reply

Does anyone know whether the current Pebble CPU has an LQFG64 package or an WLCSP64+2 package ?

Boo - Reply

i already FIX Ver2 pebble with screw.. Replace The Screen inside watch the photo in my Facebook here .. Some how got a liltle bit crack when i wanna remove the old screen ..

https://www.facebook.com/media/set/?set=...

fadzliezsix - Reply

What is the battery composition? Ni-Ca or Li-Ion

bhavin7827 - Reply

The pic of the board connecting to the battery in Step 13 has a glaring unused section of board shown in the lower left. This is not common board layout practices. My guess is that an IC was removed from their DVT units before this PVT shipped and they didn't bother to re-route. My guess is that it was either a wireless chip or additional sensor that did not work out with the DVT step.

filderhoff - Reply

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