Hi Erhard,
There may be two problems happening here.
First, the power source may not be working properly. The X10 manuals (both v1 and v2) both say that when the power supply goes from 4.01 to 4.5 volts the led will turn yellow.
Second, are you using S-FHSS in your 4in1 module? If you were using FrSky D8 or D16 then the frame rates with those protocols are incompatible with SBUS and servo operation will be erratic.
There may be two problems happening here.
First, the power source may not be working properly. The X10 manuals (both v1 and v2) both say that when the power supply goes from 4.01 to 4.5 volts the led will turn yellow.
Second, are you using S-FHSS in your 4in1 module? If you were using FrSky D8 or D16 then the frame rates with those protocols are incompatible with SBUS and servo operation will be erratic.