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Futaba 3PL - no steering

Old 12-03-2018, 12:27 PM
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triver525
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Default Futaba 3PL - no steering

I just bought a used Futaba 3PL that came with two R2004GF receivers. I plugged everything in and I was able to bind the receiver to the transmitter no problem and the throttle controls the ESC perfectly. The problem comes in when I plug the servo into CH2. The servo runs all the way to one end and sits there and buzzes.

I tried pulling down the end points on the transmitter, turning the wheel fully, etc etc. It even does it with the transmitter off.

Servo is a Trackstar TS-P12S. It is just a small digital servo which worked perfectly with the Spektrum radio that was stock.

Any ideas?
Old 12-03-2018, 01:14 PM
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[QUOTE The problem comes in when I plug the servo into CH2.[/QUOTE]

Steering goes on channel 1... Manual https://www.manualslib.com/manual/378255/Futaba-3pl-2-4g.html
Old 12-03-2018, 05:10 PM
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triver525
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So I checked the position I plugged it into and it was channel 1. When I turn the wheel full left I can get the servo to center and stop buzzing. Anything off of full left drives the servo to the end.
Old 12-03-2018, 05:12 PM
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triver525
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Also, when I turn the transmitter off it stops.
Old 12-03-2018, 11:51 PM
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Have you tried a different servo to see how it act in there? That'd probably be the next step. Does it act the same way using the other receiver?
Old 12-04-2018, 04:20 AM
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+1 ^^^ on checking other receiver.

Since channel two (throttle) works fine, I would also swap channel inputs on the receiver to use the transmitter's trigger to send signals to the servo.
Old 12-04-2018, 04:58 AM
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Originally Posted by triver525 View Post
So I checked the position I plugged it into and it was channel 1. When I turn the wheel full left I can get the servo to center and stop buzzing. Anything off of full left drives the servo to the end.
It's quite normal for digital servos to "buzz" , or make noise even when steering is in neutral position.
Old 12-04-2018, 12:52 PM
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Another thing to check is the wiring orientation in the plug. They're pretty standardized now days but it could be different. I've had that problem with KO Propo servos in the past. I'm not up on all the digital stuff but it's something else to check.
Old 12-05-2018, 09:55 AM
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Originally Posted by triver525 View Post
I just bought a used Futaba 3PL that came with two R2004GF receivers. I plugged everything in and I was able to bind the receiver to the transmitter no problem and the throttle controls the ESC perfectly. The problem comes in when I plug the servo into CH2. The servo runs all the way to one end and sits there and buzzes.

I tried pulling down the end points on the transmitter, turning the wheel fully, etc etc. It even does it with the transmitter off.

Servo is a Trackstar TS-P12S. It is just a small digital servo which worked perfectly with the Spektrum radio that was stock.

Any ideas?
I'm not quite sure what you mean by pulling down, but the steering EPAs (both Left and Right) are set to 100%? My thinking is the right EPA is somehow set to 0%. I
'am out of ideas.

Good luck!
Old 12-06-2018, 08:49 AM
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Futaba Radios Direct support forum
Old 12-06-2018, 04:13 PM
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RC Chan
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Thumbs up Futaba 7PX for Sale

Hello All,

I have a Futaba 7PX that I can't use with my Traxxas XMAX, long story short, it'll take away some of the control options that are on the original controller. It's brand new, I only opened it to check the contents. Will to let it go for $500. Please contact Chan @ 310-703-6706 or [email protected] for more details.

Happy RCing!

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