Introduction
Ding-dong, le dongle est là ! Google sait que les vidéos de chats sont plus divertissantes lorsqu'elles sont visionnées sur un écran HD de 72 pouces. La société américaine a donc intégré Chrome dans un dongle compact, l'a doté d'une sortie HDMI et a fourni au monde les vidéos de chats que nous méritons ! Rejoignez-nous pour décortiquer le Chromecast et découvrir comment Google a réussi à faire tenir autant de chats dans un si petit boîtier.
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Ce dont vous avez besoin
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Après avoir ouvert la boîte du Chromecast, nous sommes accueillis par bien plus qu'un simple dongle.
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Spécifications et caractéristiques du dongle :
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Sortie HDMI 1080p
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2.4 GHz Wi-Fi 802.11 b/g/n
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Résolution vidéo de sortie maximale de 1080P
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Alimentation par USB
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Compatible avec une multitude d'appareils, y compris les appareils iOS et Android
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Le seul port du Chromecast est le port de charge USB. Comme si les téléviseurs n'avaient pas déjà assez de fils, votre nouveau dongle préféré nécessite une alimentation externe via USB.
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Au moins, Google l'a mentionné en quelque sorte...
No, the USB is only required if your HDMI input will not supply enough power over the HDMI 5v line, see http://www.hdmi.org/learningcenter/kb.as...
HDMI Sink Devices (like TV's) aren't the one's providing 50mA power, it's the source device. In this case, the source device is the Chromecast. Sorry but you likely need the USB power unless your TV is not following the HDMI spec.
I would like to make a costum case with better heatsick for that fun diy project
What's the current rating on the power adapter? Regulation?
What's the current draw when idling, and when streaming?
Thanks
At 4.8 volts I'm showing 315ma streaming and 240ma (when the background picture changes
it peaks closer to the 300ma figure in standby.
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À notre grand soulagement (et peut-être un peu à notre grande déception), il semble que nous n'aurons pas besoin de sortir l'artillerie lourde pour ouvrir ce petit bonhomme.
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Un outil pour ouvrir en plastique exploite la jointure de notre dongle, et c'est ainsi que nous pouvons commencer à extraire des composants.
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La première chose à sortir est, eh bien, tout. En retirant la carte mère du Chromecast, nous nous retrouvons avec une coquille vide.
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Presque vide, à l'exception de quelques restes thermiques excessifs et d'un gros morceau de dissipateur thermique en aluminium.
I managed to bend the HDMI plug. The device has stopped working. Any advice in how to realign it please ?
Mine also got bent, and thus the metal housing broke off. It still worked, but eventually one of the pins housed inside of the Female HDMI Jack Socket (the black plastic part) got bent. Now when connected it still works, but seems to abort the streaming due to that pin being bent all the way back. I wish there was a full teardown guide, because contrary to the author’s opinion, the HDMI Jack socket can definitely be repaired, and thus it can be brought back to life.
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Le système nerveux central :
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Module combiné AzureWave AW-NH387 802.11 b/g/n WLAN, Bluetooth et FM
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Système sur puce (SoC) Marvell DE3005-A1
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Mémoire flash NAND Micron MT29F16G08MAA 16 Gb (2 Go)
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SDRAM DDR3L Micron D9PXV 512 Mo
The USB connector dismounted (aka "broke off") on mine. Appreciate the teardown photos. About to perform surface mount surgery under a stereo microscope. "No user serviceable parts inside" is really just a suggestion... LOL
Hi there how did it go with this fix?
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Une fois la carte mère retirée, il ne reste plus qu'un seul composant : un dissipateur thermique (relativement) énorme. Fabriqué en aluminium massif et s'étendant sur toute la longueur de l'appareil, il repose dans un minuscule cercueil.
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Nous ne pouvons pas dire que nous sommes surpris, car les informations sur le produit indiquent que "le Chromecast peut chauffer au toucher ; c'est normal".
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C'est un peu déconcertant, du même genre que "les effets secondaires peuvent aller jusqu'à la mort".
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Nous avons décidé de ne pas attribuer de note de réparabilité au Chromecast.
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Il n'y a tout simplement rien à réparer. Le Chromecast est essentiellement un objet de luxe dont l'utilisation est limitée.
I want to repair the HDMI port
You can buy or source HDMI ports from old cables and carefully solder them on!
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27 commentaires
Thanks, that's great to know..
This is incorrect, people have tested this and it doesn't work.
Dongle, dongle, dongle... yes, it is a fun word to type.
Any warning which includes the phrase "this is normal", clearly indicates something which any normal person would realize is not normal.
Next teardown a Galaxy Minstrel .... or was that just a British thing? They don't melt in your hand (according to the advert anyhow) www.youtube.com/watch?v=R8ggWmC_Cpg
Bees -
Very very interesting design. Lots of somewhat surprising things! In particular, TSSOP flash was a little unexpected... I don't suppose you guys still have one around to try ripping the flash off of to see if there are BGA landings under there?
Other aggressively cost-reduced NAND consumers (i.e., USB thumb drives and SD cards) often have landings for both BGA and TSSOP flashes so that they can quickly change to whatever the cheapest source of NAND flash is that day without having to spin a new SKU of their board... would be interesting to know if Google did the same here.
All HDMI 1.4 is HDMI 1.3c but listed on the HDMI web site. So tell me just how that makes it capable of powering devices? Magic perhaps? :)
P.S. H2G2 is not a reference to Hitch-Hikers Guide to the Galaxy. HHGTTG is.
This is a fantastic device.
Imagine being able to wakk up to any TV and watch your content or display map/location.
Add a touch sensitive display and you've got one heck of a tablet!
H2G2 is a reference to the Hitch Hiker's Guide The Galaxy, see http://www.h2g2.com
Doesn't the AzureWave AW-NH387 use the Marvell 8787 WiFi device?
Would like to see an analysis of the WiFi antenna used.
The antenna is a PIFA integrated as part of the copper on the PCB. You can see it just above the AzureWave chip where there is cutout from the metal shield. PIFA antenna general have best performance by pushing against the ground plane, thus the bigger the ground plane the better. The HDMI ground should provide a ground plane to the entire TV.
Tat Huen -
Does anyone know who makes the two power regulator chips they are using on this design? I believe this would be the two small square chips marked WRVL-686B-311GAE and WRVL-21AA3-246GAO?
It is my understanding that HDMI1.x sink ports will not supply power out of the HDMI port, only MHL enabled HDMI sink ports can do this. If someone has a pointer in the HDMI spec that says anything about sinks putting out power then please share the reference.
Perhaps these are MRVL instead of WRVL, which would make them Marvell chips?
Marvell does make switchers:
The nerd humor continues if you look at the model number of the power adapter it comes with - "MST3K-US".
I just stumbled on a feature that I have not seen mentioned anywhere. I have a Logitech Revue attached to my TV and to my network. When I play a YouTube video and hit the chromecast icon, I get the choice to cast to my chromecast dongle, my own device (laptop) or my Google TV. I just disconnected my googlecast dongle from my TV and still get the option to cast to my Google TV and it works just like I was broadcasting to the Chromecast dongle. At least some of the required drivers must be present in my Revue. Cool! Maybe I will be able to use the Revue instead of a dongle on this TV.
It's too bad the author denied two edits that state that the device can be powered by the 5v line on the HDMI 1.4 input instead of via USB. Even Google states this.
A per numerology, the word CHROMECAST is 42. (3 8 18 15 13 5 3 1 19 20) -> (3+8+9+6+4+5+3+1+1+2=42)
Does the Marvell chip drive out HDMI ?? The AW-NH387 does not seem to have a HDMI output. I wonder what component drives out the video/audio on HDMI.
No, the AW-NH384 is a WiFi module.
The Marvell DE3005-A1, otherwise known as the ARMADA 1500-mini, drives out the HDMI.
Verk -
Hello, somebody know thr part number of the U13?. is the yellow one at the left near the usb
How to fix the charger port
good day,
someone could facilitate logical circuit plane Chromecast Teardown?
I have bought a used Chromecast key and the gold metallic part where we insert the key is missing. Any possibility to find one and put it back on it?
