Maybe you can check one thing first: does the rangefinder agrees with film plane? You can put a small ground glass or matte plastic on the film plane to check. Sometimes it could be just the focus wheel/scale is not properly attached.
Those fujica rangefinders from the similar era are very similar in construction. I have worked on my 35EE/SE and 35ML, although not the V2. Removing the top should be very similar. Once the top is removed, you can check the rangefinder adjustment screw. Also check if the half silver mirror is loose or not, but don't clean it other than air blower.
You might search youtube for the other models, if you cannot find a good repair video on the V2.