1. Arduino YUN Schematic (PDF)
2. Arduino YUN Layout (PDF)
3. Arduino YUN Gerber (RAR)
How can I trust these documents ? There are several noticeable differences between what they show and what I see on my Yun boards (see image).
You can't :0
The schematic doesn't contain a meaningful version number (only Rev. 010 in the frame) and is dated "Friday, August 30, 2013", this appears to be the same as the one provided on the Yùn product page (http://arduino.cc/en/uploads/Main/arduino-Yun-schematic.pdf.
However, the PDF containing the layout and the gerber files are consistent: they have the same date "2013-08-30" in their frames, additionally giving a hint on the board revision number with the layout file name "dogStick-01-V03.PCB".
My guess is that these files are related to Arduino Yùn R3, but my Yùn board (which contains the same changes as yours) has "R4" silkscreened (EDIT: actually in the bottom copper layer) on the bottom side near the bottom right corner of the PCB, so it looks like revisions don't match :(
There is also a ZIP file on the Yùn product page (http://arduino.cc/en/uploads/Main/arduino-Yun-DSN.zip) containing what appears to be the Orcad design file "DOGSTICK-V05(20140224).DSN", but I don't have Orcad and I can't import it in either Altium or PADS (f someone has Orcad and can generate a PDF out of it, thanks :grin:). So it looks like it is V05?!? Not so easy! The same file (zipped under a different name!) is available on the Linino Arduino Yùn product page http://www.linino.org/wordpress/wp-content/uploads/2014/02/Arduino_YUN-R4.DSN_.zip with a label "Arduino Yun R4 (ORCAD)" in front of it!
Even better, on the same Linino Arduino Yùn page (http://www.linino.org/modules/yun/), there is a PDF file http://www.linino.org/wordpress/wp-content/uploads/2014/02/Arduino-Yun-V4-Schematic.pdf with the label "Arduino Yun R4 Schematic (pdf)". Its frame contains a date "Friday, February 28, 2014", so it looks like it is newer indeed and corresponds to the Arduino Yùn R4 design. There is an item "Arduino Yun R4 Gerber (pdf)", but no link to download :relaxed:
And you can't trust this schematic anyway, as my board has 3 buttons ("32U4 RST", "YUN RST" and "WLAN RST"), but I only see 2 in the schematic ("32U4 Reset" and "USER BUTTON")!
My conclusion is that Arduino/Dog Hunter is providing outdated or incomplete versions of the design files, be it on purpose or not.
Actually, the Yùn is selling like hot cakes with a comfortable margin, and they surely don't want to see cheap Chinese clone appearing soon ]:D