Rokuhan RC-02 Controller Problem

Michael Levy Apr 10, 2022

  1. Michael Levy

    Michael Levy TrainBoard Member

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    Hello. I bought a Rokuhan RC-02 Controller last August. The problem I am having is that the controller is stuck in the "full-throttle" speed no matter how the dial on the controller is set. Additionally, when I turn the dial to the slowest position (off position), the trains keep running full speed. Any idea what is wrong or if it can be fixed. Thanks in advance for any suggestions.
    ~Michael
     
  2. CNE1899

    CNE1899 TrainBoard Member

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    Micheal,
    I can't help you right now, but I may know in the near future. I bought an RC-02 this winter and need to hook it up.
    I'll try to get to it this week.

    Scott
     
  3. rray

    rray Staff Member

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    I used DCC, but that sounds like the controller went bad. Everything can be fixed, but you have to take it apart and inspect inside first.
     
  4. husafreak

    husafreak TrainBoard Member

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    Good luck. I accidentally reversed polarity and burned an RC-02 (got my Rokuhan and Snail Speed controller wall warts mixed up) and the CB in that is very tiny and densely packed.
     
  5. CNE1899

    CNE1899 TrainBoard Member

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    Well,
    I finally set up a test track and hooked up the Rohukan RC-02 with an adapter to an MTL starter oval, to test some locomotives.
    The power light comes on, but nothing happens. The locomotive does not run.
    I then put a nine volt battery on the locomotive wheels, and it runs.
    Touched the battery to the tracks, and the loco runs.
    I took the controller to work where my co-worker tested it on a oscilloscope, the power came on, the forward/reverse switch worked, but the speed dial did not work. No change in the wave.
    I contacted the vendor, so I'll wait and see what he says.

    Scott
     
  6. ztrack

    ztrack TrainBoard Supporter Advertiser

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    Scott hello! Sorry for the issue. Question, are you using batteries or the A028 wall adapter? If you are trying with batteries, you may want to try with the A028. Either way, if you purchased through one of our authorized Rokuhan dealers, then you are covered under warranty. We are the North American distributor for Rokuhan and cover all products purchased through our channels. You can also contact us offline. - Rob
     
  7. CNE1899

    CNE1899 TrainBoard Member

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    Rob,
    I was using the A028 adapter.

    Scott
     
  8. SJ Z-man

    SJ Z-man TrainBoard Member

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    The MTL older open armature motors draw far more current than the Controller can deliver. The later GP9/35 has a corellas motor but still marginal current. Once any pulse from Controller detects higher current, it can shut it down. They are designed for Rokuhan low power loco motors, just sooo close.

    #1 Does the Power LED come on? (even tho you see on the ‘scope, I have ask)
    #2 Does the Short LED come on? ( I assume not)

    If the ‘scope showed no Pulses or level DC or, ‘keep-alive’ lighting pulses, it’s toast.
     
  9. CNE1899

    CNE1899 TrainBoard Member

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    Jeff,
    Yes to #1.
    No to #2.
    I am going to ship it to Rob at ZTrack.

    Thanks,
    Scott
     
    Kez likes this.
  10. SJ Z-man

    SJ Z-man TrainBoard Member

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    Did you get it repaired/replaced yet?
     
  11. CNE1899

    CNE1899 TrainBoard Member

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    Jeff,
    Yes , I got the repaired controller back from Rob, and it works great!
    To quote Rob about why it was not working, "I found one of the pins for the A028 was slightly bent
    preventing the A028 for connecting all of the way. I also found the constant lighting circuit was turned up.
    I set this back to 0. After those two corrections, all worked great."
    I am now testing and enjoying my locos! Thanks Rob!

    Scott
     
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  12. ztrack

    ztrack TrainBoard Supporter Advertiser

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    Excellent!!!
     
    CNE1899 likes this.

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