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l/c electrical gremlin (FIXED)

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  • l/c electrical gremlin (FIXED)

    Ok without going into a lot of backstory this is the Pro-x l/c for my pitlane. Worked great in testing and a couple of times hooked up on the track and then it stopped working. Took the back off and the motor was super hot. Checked the connections and everything was fine. Let the motor cool down and as soon as power was put to it the changer activated without any car near it. Motor got hot again like it's keeping the power on to the l/c. I have another l/c I can steal the motor from but the wires on the motor are not color coded so I don't know which one goes where on the board or if it matters. There is continuity on the board where the motor attaches.
    Dave

    Before anyone suggests a return it can't be exchanged as the sensor was moved and painting the track. 20210209_151500.jpg
    Last edited by dw5555; 02-18-2021, 10:18 AM.

  • #2
    Do I remember correctly that you are using this backwards as an exit from a garage area?

    Just a random wonder is a rail polarity issue? I think I read MrFlippant and Bruce explaining in a different thread about how the pit lane rails are powered from the circuit board.

    Can there be a "backwards" for sending power to the circuit board?

    Maybe check with a volt meter and see if the polarity is different anywhere.
    Last edited by Elektrobot; 02-09-2021, 03:22 PM.

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    • #3
      Hey Dave, just want to be sure the little rods are routed properly. When you say the solenoid is hot it makes me think it's trying to pull but it's getting stuck on something. Be sure it's in the proper position and everything moves freely.

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      • #4
        Too bad Carrera does not offer replacement parts for lane changers.( Solenoids,chips,) We have 12 lane changers in our lay-out and 6 of them don't work. (chips go bad) This is over a 8 year period. Carlos is also correct as the gates come out of their brackets sometimes! (Hi Carlos)

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        • #5
          Originally posted by anthonyalonso View Post
          Too bad Carrera does not offer replacement parts for lane changers.( Solenoids,chips,) We have 12 lane changers in our lay-out and 6 of them don't work. (chips go bad) This is over a 8 year period. Carlos is also correct as the gates come out of their brackets sometimes! (Hi Carlos)
          Hi Tom, how's it going?? Good to see you back on the forum and driving your slot cars again

          I've had 2 LC's go bad through the years, one just happened and I don't know why. The other was due to me trying to modify it and the chip received reverse polarity at some pretty high voltage.

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          • #6
            Originally posted by dw5555 View Post
            Ok without going into a lot of backstory this is the Pro-x l/c for my pitlane. Worked great in testing and a couple of times hooked up on the track and then it stopped working. Took the back off and the motor was super hot. Checked the connections and everything was fine. ..........
            Dave

            Before anyone suggests a return it can't be exchanged as the sensor was moved and painting the track. ...
            Hey Dave, if you take it out of the pit lane and does it work like normal?? I assume you're using it to alternatively divert traffic in your pitlane. If you can take it out and try it elsewhere it might provide some clues...or maybe not.
            Last edited by carlosinseattle; 02-09-2021, 05:45 PM. Reason: Removed pic

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            • #7
              If that solenoid is getting power for more than a few seconds it will get hot. Even hotter if it can't travel its full stroke. It should only briefly operate to open the lane gate and shut off. Should only be getting a pulse of power.

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              • #8
                These are simple, electromagnetic solenoids. There is no polarity for the wires, and they only pull when charged. If it's heating up, then it's stuck on for some reason. Generally, that means there's a failure somewhere in the electronics. Maybe a short was created somewhere?
                I would expect that if you swap out the "motor" from another LC, that the same thing will happen. I don't know about polarity to the board, but Carlos indicates that it matters.
                Do you have any other Pro-X LCs you can pull the guts from, or use in place of that one?

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                • #9
                  Originally posted by carlosinseattle View Post

                  Hey Dave, if you take it out of the pit lane and does it work like normal?? I assume you're using it to alternatively divert traffic in your pitlane. If you can take it out and try it elsewhere it might provide some clues...or maybe not.
                  No after it sopped working I pulled it from the track. All testing is done using just a cu and the l/c. Everything is free, nothing is stuck. Does it's normal snap open when activated, just not shutting off. Unfortunately I don't have another Pro-x to swap boards.

                  The only thing that I can't figure out if WHY is it activated as soon as soon as the power to the track is turned on.
                  Last edited by dw5555; 02-10-2021, 06:58 AM.

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                  • #10
                    Anyone else notice how crappy the solder leads are on the board from the motor. Almost looks like they have been resoldered.

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                    • #11
                      Sure looks like someone has been there before..... could this lane changer be second hand to you? Maybe this problem was already there, smoked a solenoid, was replaced and passed along.

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                      • #12
                        Wow. I didn't see that before. I'm with Rokon... that's a repair job. Whatever is causing it to overheat was probably happening before you got it.

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                        • #13
                          Yeah it was bought and sold as new from hobby store on ebay.

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                          • #14
                            Well I guess this goes on the back burner for now. I could swap solenoids with another one but I kinda agree with Greg, I don't think it will make a difference. I think the problem is the board which I don't have. I never thought I would say this but it sure would have been nice to have a defective part from the start rather than work for a short time and then stop.

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                            • #15
                              If any of you guys are still reading this tell me if my thinking is right.

                              There are only 3 parts that can go bad in the L/C.
                              A: The Solenoid
                              B: The Sensor
                              C: The Computer board.

                              On startup there is constant power to the board. When the car crosses the sensor and you hit the button the sensor sends an electrical signal to the board to power the solenoid which opens the lane gate. In my case since the gate opens automatically on power up is it possible the sensor is bad and is sending a constant signal to the board causing the solenoid to heat up. Or doesn't it work like that? Just spit balling here.

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