Received 4 lights with batteries installed. Checked retaining rings and all were tight. One light would get stuck in the low level strobe and no other modes available when the switch was pressed. This was intermittent and only happened a few times.
Took time to investigate the problem today and I could create the problem by very slightly loosen the head.
I finally cleaned threads and lubed with nyogel. Now I could not create the problem again.
Did not clean contact pads on the board yet but all seems well for now.
Tail was tightened first very tight and problem still there. Somehow cleaning threads fixed and I could not recreate the problem by loosening the head very slightly as before.
I’ve posted before about my fw3a stepping down to soon @40-50*C. , well I undid the bezel & took the optics out & noticed a discoloured led ,when the light is on moonlight it was showing a blue tinge , & I’ve been noticing it getting extremely hot to the touch whilst on turbo but also only reading 45*C when cold & about 54-55*C when warm when the thermal regulation turns the light down sharply ,now I have the optics off I can now see the FW smoking quite badly , I’ve emailed neal & told him. I thought I would take a video of it to show him & whilst I was videoing it I managed to catch it stop working ,it’s actually melted the solder on the black wire. Here’s the video
On turbo it will get very hot, very fast. Mine steps down after 15 seconds with a 30Q. It stepped down after 12 seconds when the stock ambient calibration was off.
You never want to run a light (any light) at high power with nothing pressing the mcpcb to the head. The pressure is needed to transfer the heat and prevents the leds from burning up.
The smoke in your video is probably the flux or maybe the wire insulation burning because the mcpcb over heated due to insufficient pressure to the head.
Your original issue of a blueish led on moonlight is quite odd. It might have been due to that led not being reflowed properly, but it’s hard to say for sure.
I was just looking at a bmw motorcyle (F750GS Adventure Tourer) and the dang thing has push button preload adjust on the rear spring. Push the handle bar joystick and the darn bike raises and lowers hydraulically! Crazy! Not to mention the big lcd screen with all it’s fancy features. Geez, my bike is from 1986. Lol
It helps that computronium has recently become relatively small and cheap, and so has circuit printing. Many tasks don’t need more than a few MHz on the control chip, or more than a few KB of instructions, so all it needs for a brain is a fifty-cent chip the size of a small toenail.
Yes it was turbo but you can see it was only on for a few seconds before smoking & the light was cold at startup , it’s actually melted the solder on the black wire , mine will ( would have ) always step down when it reached 45*C from cold & 55 when warm whatever thermal limit I put it on , out of the box the step down was almost instant. The dodgy led has only been happening since 24 hours ago ,since the dodgy led ,although it still did work you could clearly see that only two of them works on full power ( like car head beams)
Very interesting, my flashlight lives his own life, it can turn on an off without me. Happend a few minutes ago, it stood on the table near me and suddenly swithed on. It’s kind of…disturbing.