I have a TN32 that has had very little use. Apart from testing and night shots the light has not been used. On going to use the light quite awhile ago it would not work. Swapping the battery carrier, tube and tailcap from a working TN35 the light still would not work. It has only ever had Soshine 3100 mAh protected batteries in it.
I have just pulled the driver out of it and was surprised to find broken plastic parts which were originally from around the coil. The following pictures are from this light.
Has anyone got any suggestions for me about fixing this light if this is the problem. All other components appear to be fine. Thanks.
looks like the coil got extremely hot, maybe do to a short in the curcuit, or did something contact the coil to break it? ( as in a part of the magnetic control ring turning & hitting it and breaking the coil’s casing)
I cant see anything that can come into contact with it and theres no smell of anything that is burnt. I've just removed the drivere and it appears that there may of been a dry solder on the pad under the coil. I'm not sure if this a heat or electrical path.
No…cheap Chinese ferrite coils…I have a 470 coil in a “tail light” that I put in my riding mower as a headlight and one didn’t work…so I ended up opening it up and sure nuff…the coil was split in two
That pad is a surface mount power inductor
Need a measurement of the size of the inductor, the distance between the pads, and the size of the pads
The inductor is about 9.5mm square but the pad that is not attached sticks out making it about 9.5 x 11.5mm. The pads on the driver are large being about 7x3mm. A smaller inductor would make it a lot easier to solder on as theres no room on the side that is not attached due to a yellowish block being in the way to get a soldering iron tip down there.
Have you tried going to thrunite? That’s no doubt a cold solder joint, the pic clearly shows that, ask for a replacement or to buy a whole new driver for parts.
Exactly. This should be covered under warranty and they should fix you up with no issues or hassle. If you get nowhere with their customer service let me know and I will speak with the owner.
Bump. Just wondering how this faired for you after contacting Thrunite. I have this exact same issue with my TN32 except mine still works as normal. Heard something rattling in the head so I took the driver out and the coil was cracked and broken pieces of metal went everywhere.
Interesting. I never heard back from them though I did not go out of my way to chase it up. I wonder how many others out there have the same issue and dont now? The light I had stopped working all together.
Um thats not good. I guess since mine is working right now I wont worry too much. If it stops then Ill have to see what I can do to get them to fix it.
