Question about Parkzone Pkz1155 Receiver 390-j-3 Channel-5 Slow/slo-v

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Servo jittering without transmitter turned ON

When I plug in the main battery the servo keep jittering sometimes if I move the receiver aound the servo travel alone to the stop and make gear skipping noises

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My problem is that when I turn on the truck my steering servo puches the tires to the right and they stay there. I have tried to reset it, but it dosent seem to work. I took the servo apart and turned...

sounds to me to be a faulty servo but it could also be a fault on the transmitter you need to check both does it move at all when you try to steer left? try it without the connecting rod on the servo good luck

Aug 14, 2011 | Traxxas 110 Slash Truck Mike Jenkins

1 Answer

When, I am walking around with either a guitar plugged in or a lavaliere microphone. I continue to get pops and static surging sounds. Is there a way to fix this.

Although it has 2 antennae the AT201 is a single channel transmitter and receiver. As you move the transmitter about in relation to the receiver you are finding 'dead spots' in the room where the signal is reduced or even drops out completely. You can reduce the impact of this somewhat by doing the following things.
  1. Make sure there is a clear line of sight between transmitter and receiver.
  2. Move transmitter and receiver closer together
  3. Do not locate the receiver near large pieces of metal or near other electrical equipment, particularly things that have strong magnetic fields like transformers (including amplifier power-supplies) CD or DVD players, hearing loop amplifiers and loop cables.
  4. Turn off mobile phones and any other radio operated equipment that is not needed
  5. Turn the trim control on the transmitter to the maximum output that you can without causing distortion. The stronger the original signal from the transmitter the lower the related noise will appear to be (called signal - noise ratio)
  6. Turn the squelch control on the receiver up a bit to suppress noise - however doing so will reduce the strength of the output signal a bit so don't over do it.
  7. Use good quality screened cable between the receiver and your amplifier. Unfortunately the AT201 only has an un-balanced mono jack socket so this cable will be more prone to pick up radio interference than a twin core plus screen (balanced) cable.
  8. Make sure that your signal cable does not run parallel to, and close to, any mains electricity cables. If the signal cable needs to cross any mains cables it should do so at 90 degrees and the cables router well away from each other.
However the only real solution to this sort of problem is to use a full duplex (2 channel) transmitter / receiver system which will automatically switch to whichever channel is carrying the stronger signal. Typically these cost about 70% more than single channel units but they often use balanced cable outputs (stereo jack or xlr) which further reduce the propensity for noise due to interference.

Feb 02, 2011 | Audio Technica (ATW-T201-T2) Microphone

2 Answers


I have exactly the same problem. It used to work fine for a long time but all of a suffen i got this problem. Do not yet know how to solve it.

Carl C

Jan 09, 2011 | Esky Toys

1 Answer

Why does the steering servo jitter when turned on?, eventhough i have put fresh batteries,and the tire alignement turns to the right side.

The servo may be damaged. I would take it to a hobby shop and have them look at it. You can get cheap servos on amazon.

Nov 30, 2010 | Traxxas T Maxx 3.3 Monster Truck

2 Answers

When i start my tmaxx it tries to take off by itself wide open i cant stop it just keeps going

Assuming the transmitter is still set correctly then the problem is either your receiver is defective or your throttle servo is defective and/or both. Don't start the engine but switch the servo wires. If the switched servo now doesn't work then your receiver is bad, if it does work then the other servo is bad. Good luck

May 03, 2010 | Traxxas T Maxx 3.3 Monster Truck

1 Answer

Steering servo makes hard rt turn without turning steering wheel. batteries are fully charged and all connections appear secure. can temporarily eliminate prob by turning transmitter off/on.

2 possible problems:
transmitter-The variable resistor inside your transmitter is stuck fully on. Take apart the transmitter - look for the part under the wheel. It should have a 3 wire variable resistor under there - check for broken wires shorting to the other side or simply broken solder joints.

2nd possible answer is the car has a shorted output drivers on the motor controller board.

hard to fix without a schematic.

the guaranteed seo services provider

Apr 13, 2010 | Futaba 3pm-fs Pro 3-ch Synthesized...

1 Answer

It appears the steering locked up. What do I do?

Make sure that no debris (stones, sticks, etc.) have gotten jammed in tie rods or steering servo. Check to see if servo is trying to move, you should be able to hear it when you turn the wheel on the transmitter. If the servo is not working at all, it could be faulty, came disconnected at the receiver, or receiver pack has too low of voltage. If the servo is trying to turn, check the servo saver to make sure it has not loosened or has been damaged.

Jan 05, 2010 | Traxxas Rc Revo Nitro Monster Truck

1 Answer

I just bought a t-maxx off of ebay, didn't come with the original instruction manual for the transmission. it does'nt seem 2 go foward.

The red thumbswitch on the transmitter controls the forward/reverse servo. With the body off of the truck, flip the switch up and down and see if the servo is moving. The servo moves a linkage back and forth in the transmission. This linkage could be out of adjustment. If the servo is not moving remove the receiver box and make sure that the servo is plugged into the receiver. Manuals are available from Traxxas, you can check on their website. You might even be able to download a copy from the web site. If not you can purchase a hard copy from them.

Oct 24, 2009 | Traxxas 4910 T-Maxx RC Monster Truck

1 Answer

How do you change the throttle servo on a revo 3.3

Disconnect the servo at the receiver, remove the servo horn and linkage from the servo. Remove the four screws that hold the servo to the chassis. Replace with new servo, plug new servo into receiver and turn on transmitter and receiver. With transmitter and receiver on reattach servo horn and linkage. This will make sure that the servo is centered at neutral throttle.

Sep 25, 2009 | Traxxas Rc Revo Nitro Monster Truck

1 Answer


I found this on a search:
"I have the full set of instructions, contact me at
Not a very reliable system, transmitter keeps resetting to 17:25; locks up. Whole system then requires setting up from scratch. Had a replacement transmitter, no change, and same faults.
Perhaps this can help.

Mar 15, 2008 | Computers & Internet

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