EUCMania Posted January 6, 2016 Share Posted January 6, 2016 My TG T3 does not work now. The problem: After turning on the power, the beep does not stop and self-balancing is not working. The battery is fully charged as the indicator lights says. I contacted the seller and I am still waiting for the reply. The unit is still under warranty. I also looked at the thread in this forum http://forum.electricunicycle.org/topic/1805-need-help-in-diagnosing-the-problem-tg-t3/ I wonder if replacing the mainboard can solve the problem. Did anyone has the same problem before? Please advise. Link to comment Share on other sites More sharing options...
electric_vehicle_lover Posted January 6, 2016 Share Posted January 6, 2016 I think the board do some auto-tests and find some error. I would say that can be some wrong motor phase wire - but it is unconnected... Open it and post pictures of inside, including the board and the wires. Link to comment Share on other sites More sharing options...
EUCMania Posted January 8, 2016 Author Share Posted January 8, 2016 OK, I opened the cover for the circuit board. I found a loose connector, to which my finger points. I pushed the connector, hoping to get a better connection, but the problem still persists. Please help. Link to comment Share on other sites More sharing options...
esaj Posted January 8, 2016 Share Posted January 8, 2016 Looks like that's one of the motor phase-wires, the mainboard cannot drive the motor if the three wires aren't connected. Link to comment Share on other sites More sharing options...
EUCMania Posted January 8, 2016 Author Share Posted January 8, 2016 I wonder what is looks like on the side of the board at the connector, maybe that side is loose? If that is the case, I guess I just have to solder the connector? I guess the screws for fixing the board on the machine is covered under those black glue. How to get rid of it to take the board out? Link to comment Share on other sites More sharing options...
SuperSport Posted January 8, 2016 Share Posted January 8, 2016 If the pin is broken on the back side, you can solder it. But be sure you disconnect/unplug the battery before attempting any repairs. You can also use pliers to carefully smash the connector to make it tighter on the pin if it's just a loose plug. Don't over smash as it can deform the plug, just enough to make a tight connection. You might also ask your seller if they can send you a replacement motherboard just in case that one does not stay working. Link to comment Share on other sites More sharing options...
electric_vehicle_lover Posted January 8, 2016 Share Posted January 8, 2016 I verified that connection sequence are correct with my own generic EUC: blue, green and yellow wires. I would say that the firmware tries to run the motor and it detects the motor do not run. When I turn on my generic EUC, with it flat on the ground, the motor runs turns just a few and finally the boards hangs beeping (it detects the EUC is on the ground). The firmware detects if the motor runs thanks to the 3 hall sensors signals - maybe the connector is not ok - can you please try to unconnect and connect again? Other thing you could do is the calibration process!! Link to comment Share on other sites More sharing options...
EUCMania Posted January 9, 2016 Author Share Posted January 9, 2016 The screws fixing the board on the body are covered with hot glue. How do you unscrew? Link to comment Share on other sites More sharing options...
SuperSport Posted January 9, 2016 Share Posted January 9, 2016 I use a small pair of needle nosed pliers to pick off as much as possible without touching the motherboard. The motherboard can be scraped easily. Link to comment Share on other sites More sharing options...
EUCMania Posted January 9, 2016 Author Share Posted January 9, 2016 I googled about removing hot glue. The solution I found is to use rubbing alcohol! And it indeed loosen the hot glue. After I soldered the connector back, reconnected the battery etc. ( I only disconnected the battery cable before unscrew the board. ). Yurn the power on. The problem is still the same: Constant beeping and no self-balancing. Link to comment Share on other sites More sharing options...
EUCMania Posted January 15, 2016 Author Share Posted January 15, 2016 The seller of this TG-T3 asked me to make a video showing the problem. It requires this: " Please notes: 1.the video should display the products security code, " But, I cannot find any security code on the machine. Anyone knows where the security code is on TG T3? Link to comment Share on other sites More sharing options...
dmethvin Posted January 15, 2016 Share Posted January 15, 2016 57 minutes ago, ECUMania said: The seller of this TG-T3 asked me to make a video showing the problem. It requires this: " Please notes: 1.the video should display the products security code, " But, I cannot find any security code on the machine. Anyone knows where the security code is on TG T3? Maybe they meant "serial number"? I am not sure where that would be, maybe there is one in the compartment with the control board? Instructions for opening it are in the link below, and in the video you can see a sticker. Maybe that has the number. You can always email them back and ask for more information, maybe they have a video or picture. http://forum.electricunicycle.org/topic/275-disable-alarm-tg-t3/ Link to comment Share on other sites More sharing options...
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