I have now received some OPB607A sensors and have wired one as the diagram using R1 = 150 ohm and R2 = 10K ohm. I supply 5v and measured the voltage between earth and "signal out" to 1,3v with no reflector. The sensor do not react to a reflector at all,- no change on the reading.
Have I used wrong resistors, or have I blown the sensor?