I agree 100% with Grumpy_Mike about the schematic PDF. That is by far one of the worst I've ever seen. All the capacitor values are "???" and every resistor is "0R".....It's like getting someone 90% of a solution, then giving them the finger on the last 10%. The layout is mediocre, not very well organized, some part #'s/values are missing, sheet info is missing, some symbols are hard to understand. This thing is crud.