|
DC/DC replacement switching power supply
Is there a pinout available for the internal power supply? or does a DC/DC version of the internal Apple TV 2 power supply exist?
ANSWERS:
"This Teardown has some info on the PSU - refer step 13 The sticker on the power supply has this rating: 3.4V @ 1.75A.
I see in the photo there are 8 pins on the PSU socket. Probably 2 sets of 4 pins all joined together for increased current capacity.
Also look at THIS post about replacing the PSU on the earlier version - you may be able to do something similar.
HIH"
"If you want to convert Apple TV 3 from AC to DC...
There are a total of 8 pins on the connector from the power supply. 3 are positive, 3 negative and two leave not connected. I think the unused (at least one) pin is some kind of a temperature sensor - found that out by trial and error, if you ground that pin, Apple TV shows a message about temperature being too high and turns off.
So if you are looking from the top and the HDMI connector is towards you and power supply on the right then from left to right
Pins 1,2 - unused / don't connect
Pins 3,4,5 - ground / negative (connect together)
Pins 6,7,8 - positive (connect together)
I haven't used the ATV for too long of a time on DC yet, just tried it out seems to work fine. Used a ""DC/DC Converter Regulator 12V Step DOWN to 3.3V 10W 3A"" converter purchased from eBay. So now Apple TV 3 working from 12V DC
Now to get this into the car."
See image content:
Thank you worked great!!
Just an FYI for those interested. There is no reason to connect to pin 876 for ground and pin 345 for positive. They are common. meaning they are connected on the board. if you run a continuity check You will see they are internally connected already. What that means is you can simple connect to one of those pins and the same result is achieved. IF you know how to solder and your power supply is not dead You can solder a USB cable to the board and now it is both 5vdc as well as will still work in your house plugging it in a wall. However to use in your house Make sure you get a USB cap. just in case! You don't want to ground out the USB end when not in use.
Thanks heaps for the instructions guys. Yes it will work fine with any low powered USB cable and charger. Just cut the device charging end to expose the Red (+5V) and Black (GND) strands. You can cut away the data strands (Green and White) as they will not be used. The other end of the USB cable is of course connected to the USB charger so do not cut it.
| 