Working on my son-in-law's Dremel today. It does nothing when switched on. Anybody have experience with one of these?
I have the (useless) owner's manual as well as a parts diagram, but it does not provide any details on the electronics. The switch and controller is sold as a replacement board for ~$20. I suspect that would fix it but of course I'd like to 1) be sure, and 2) find a cheaper fix if possible.
So far I've done a visual inspection and a little probing with the multimeter. Everything looks clean and mechanically in good shape. No burns. Brushes look good with little wear.
There is continuity across the thermal fuse. I'm not sure how to test the stator coil but I do see a few ohms across opposite terminals, from one brush holder to the opposite pole of the coil. I have not been able to show that the switch works. I get "open". It could be that I haven't made good contact yet, but I'm wondering if that switch could have failed. Is that a reasonable possibility? I thought a switch like that would work "forever".
Just two more questions: With the rotor out of the way, is it OK to briefly power up the device and look for power at the brush holders? What is that blue wire and clip for? I was unable to see where it was as I pulled the tool open.
I have the (useless) owner's manual as well as a parts diagram, but it does not provide any details on the electronics. The switch and controller is sold as a replacement board for ~$20. I suspect that would fix it but of course I'd like to 1) be sure, and 2) find a cheaper fix if possible.
So far I've done a visual inspection and a little probing with the multimeter. Everything looks clean and mechanically in good shape. No burns. Brushes look good with little wear.
There is continuity across the thermal fuse. I'm not sure how to test the stator coil but I do see a few ohms across opposite terminals, from one brush holder to the opposite pole of the coil. I have not been able to show that the switch works. I get "open". It could be that I haven't made good contact yet, but I'm wondering if that switch could have failed. Is that a reasonable possibility? I thought a switch like that would work "forever".
Just two more questions: With the rotor out of the way, is it OK to briefly power up the device and look for power at the brush holders? What is that blue wire and clip for? I was unable to see where it was as I pulled the tool open.