Question
how to find sprinklers vaules. I have 7 zones, but
i found 3 values. one of my zone just stay on all the time. so i think one of value must be bad. so how do find that value.

Answer
It just takes a lot of investigation and dectective work.  There are devices that can be used to locate valves, but they require some training and experiance to use.  Get a probe of some kind, or even a shovel, and just start poking around in areas that look a little greener or just a little different than others.