First off, this fix or work around is not for the faint of heart. It requires very finite soldering skills. You will void your warranty and I will not be held responsible if you end up shorting something out by improperly doing this.
This fix also applies to converting the JB-DVB-S2 into a JB-DVB-S2B
Basically all you have to do is de-solder the R27 resistor and move it to the R26 position.
Here's what I mean
And here's the JB-DVBS2 tuner as you can see they have the same resistors in the same location. but they are named differently. Resistor R22 has to go into the R21 position.