I recently got a new Cheetah 1.1b board. If I connect the Rasperry Pi or the notebook via USB the 5V drop to 4.4 and the brightness of the display is reduced and the characters are hard to read.
So what's going on there? Why is there no jumper to simply disconnect the 5VUSB power.
Unfortunately I could not find the correct schematics for that board too. So please be so kind and supply the 1.1b documentation.