Ah yes... My old friend the FP-149DP.

Great receiver -- but very unique in many ways (2.5V signal levels to the servos, < 20ma drive capability, and outputs all servo pulses at the same time, a very long time after reset until servo signals come out)... I have found lots of interesting things about this receiver that have required special treatment. As a mater of fact the only updates to the Twinsync the last 12 months were all because of this receiver.

The first 25 or 50 version 2.0 boards that shipped had a pull up resistor on the aux channel that was too strong for this receiver. You simply need to cut a trace on the back of the board with an exacto knife to fix it that removes this pull up. I can not post a pdf file to this forum so I will email it to you. All boards shipped since then already have this trace cut. When you get the drawing see if this trace is cut on the back of your board. If it is already cut then you have another problem. The only down side to doing this is the aux channel must be connected if it is in a mode that uses the aux channel. Otherwise it will get erroneous readings for the AUX channel.

I will email you the drawing of the cut to make.