Schematics for Pi 2

I see your point and agree. Also I do believe there is some information, albeit unofficial, on PP27. From here it seems to be that PP27 is the VBUS (USB 5v Power) in which case should the voltage not be between 4.75v and 5.25v as the RPi's voltage range is  5.0V±5%?

Hi Ricardo,

Sorry for the testy reply but this is a long running sore spot with me as you can probably tell by my previous responses. AFAIK it is now and for the future the (stupid)

policy of the Raspberry Pi Foundation not to release schematics (full or otherwise) for the previously mentioned Pis or even to provide a reason as to why they won't.

I keep hoping that eventually enough pressure will be applied to change it but so far I have little hope this will actually happen because there doesn't appear to be

any real incentive (read competition) to do so. It has definitely cut down but not eliminated my incentive to buy Raspberry Pis.

@ Parker

Only if the "partial" part is where the problem is, otherwise you're SOL. This is especially true with the 5+ layer boards common today as there is no way to follow

traces in the inner layers. At that point it is use a multi-meter and a LOT of probing and guessing which is also problematic due to Ball Grid Array packaging (all

the leads are under the package and therefor invisible) and very, very (very) small leads on surface mount chips.

Parker, i have it too, but too many information misssing. What about points 41 trhu 57 , my problems is on usb ports .

As Shabaz and Gary have said, with only a partial schematic, these points have not been disclosed. I have not been able to find any suggestions on any other forums either, unfortunately. Can you explain more clearly what the problem  you are experiencing is? Maybe we can find more useful information from there that can lead to a solution rather than use the test points?

EDIT: Also you could have a look at RPi's USB Documentation

Parker, i don´t think is this the right place for the problem , but..

My problem is similar as this https://www.raspberrypi.org/forums/viewtopic.php?f=28&t=110164&p=760997

Make the sugestions with no result.

If anyone has any other information to complement, I'll updating the image.

Can someone confirm which version Pi they are trying to fix.

There are mixture of names and versions.

Does it have a 26 pin GPIO with two USB or the later version with 40 pins and 4 USB ports. (as per the images above).

Thanks

Mark

Not sure if these will help

The USB_LIMIT_1A2 is driven from the LAN9514 chip Pin 35.

Mark

Hi, mcb1

Many tx for your information, i´m try fix a rasp 2b.v1.1.

It´s exactly what  I need.

Thank You.