I've recently had a breakage with one of my PF medium motors. i can plug it in, but no matter what i do it won't turn, the wire is not damaged in any way, nor is anything on the exterior of the motor or connector.
Has anybody had this problem before, and if so how did you fix it? Permalink
Sofar I've had only had an older non-PF motor fail on me. The axle would turn but very slowly and it took more energy to turn the motor spindle. When I opened up the motor I found the failure was caused by the motor's brush contacts had worn out - the brush contact was within this assembly so the entire assembly had to be replaced ( of course there's no way to get a replacement part). I ended up buying a replacement motor over bricklink. The motor was part of my 1st gen mindstorm kit(RIS). BTW If you have PF LED you can test your pf m-motor by connecting the PF LED to your m-motor electrical connectors and then mechanically turn the m-motor's axle at +300 rpm - if your motor still is working then the LEDs will light up. Permalink
I've had this issue happen not only to a medium PF, but also to an XL. Very frustrating and no good way to open either. I have tried the PF light idea, and neither of them work. Looks like the recycle bin is the best place for them... Permalink
Quoting Jarren H.
I've had this issue happen not only to a medium PF, but also to an XL. Very frustrating and no good way to open either. I have tried the PF light idea, and neither of them work. Looks like the recycle bin is the best place for them...
yeah, i tried the lights, but it didn't work, i geuss the connector's gone... Permalink
The PF connectors that are attached on top of each other run the power line parallel to each PF function - so if two M motors are connected to the same line - both draw the same power equally. LED have a lower power requirement than motors - so an LED light will stay on while a m-motor will start to slow down or stop. The IR receiver requires even more power and it will shunt off due to low power before the train motor or the m-motor shuts down.
If a working m-motor axle is mechanically rotated faster than 300 rpm then the m-motor will generate enough electricity via its power connector to light up a Lego 9v LED unit. I've been able to to make a 9v LED dynamo flashlight units that take advantage of this feature.