Anyone having a weird issue where the light begins pulsing then will shut of, goes moon, goes turbo, start pulsing again, then shut off?
It’s about 75F here and the light is cool to the touch, was about about 5 seconds then started doing this.
ToyKeeper:
That sounds like a physical connection issue. You might have a cold solder joint or some other part “flapping”, connecting and disconnecting on its own. Probably the switch or a weak connection somewhere.
From chouster: Simple thing you could do, is check if both retaining rings (driver retaining ring and switch pcb retaining ring) are screwed in properly. These can cause contact issues as well, and you don't have to disassemble much to check them. To make sure it's not the switch itself that's causing the issues, you could try bypassing the tailcap and see if problems still occur. If not, the cause of that issue is located in the tailcap (retaining ring/switch) or the tube is just a tad too short to make proper contact. Easy fix for that would be to put some solder on the retaining ring to make it a little thicker...
ME: I tightened the rings in the tailcap and in to the pill and the problem is still persisting.
I'm going to contact BG before messing with soldering anything, I'm not very good at it and would probably cause more damage than anything.
I'll see what they say before I risk damaging the light any further.
Thank you for the suggestions.
I contact BangGood and this is the reply I got:
Dear Sir:
We are sorry for the inconvenience and I am the professional guy.For the problem the supplier told us that you can use a metal tool to press the battery just like the picture.Or use a metal ring on this part to see the light condition.Some guys told me it might be the body tube is short so that the light can not turn on.
Plase just try and hope to hear from you.
I bypassed the tail cap and the light did the same thing, switching modes and pulsing.
Take the switch tail cap off. Then take a piece of wire and touch one end to the bottom on the battery (on the metal portion) and the other end to the top part of the battery tube. And make sure to touch the bare metal of the tube.
Ok, so I by passed the tailcap and did a basic talcap amp reading.
Got 2.1A on turbo then the voltage began to drop, then started pulsing, then went moon again.
I don't think the tail cap is the issue. :-/
Edit: I placed a piece of conductive metal on the positive end of my battery to ensure better contact and that didn't help either.
I’m not sure if you saw my post but I say it’s highly recommended you send your results and issues with a video of it. Neal or the professional guy or BG cs should send you a replacement or replacement parts. For yours, I just think a brand new one should be sent to you since its multiple issues. Sorry no technical info from me but my experience and 2 cents.
CircaM - Thank you for this thread. Makes things easier, especially if everyone keeps the posts to problems and solutions :)
If your light does not power on at all
Take a screwdriver and with the tailcap removed touch the bottom side (NEGATIVE) of the battery and the battery tube. If teh light reacts and lights up then your tube is too short.
If you are having mode issues
In the darkness or low light point the light to your palm and if you do not get 7 modes then there is a problem with the 7135 or solder on the driver
If possible...make a video with your cell phone and email that to them. The reference to the "professional guy" translates to "I am your point of contact and the person that will be responsible to help". The language barrier can be rough at times and often Chinese employees are forced to do so even of they have English deficiency. Hang in there ;)
From the testing that you’ve done and reported, it’s obvious that the problem is either in the head or in the contacts between the head, driver and emitter board somewhere (ok, I DID say that it was obvious :)!). Have you opened up the head (there’s a retaining ring so I guess it should come apart easily) and maybe post some pics of both sides of the driver and the emitter board. I can attest that there are some pretty sharp-eyed people on here that can spot something wrong from just pics :)…
One out of my 6 was doing something very similar, but then it stopped flickering and seems to be working fine. The other now has no moonlight mode. I assume this is the 7135?
OK so I just put in a battery to see if the other one flickers, now its going modes 1-7 short press but after 7 it goes into the backward modes of turbo-strobe-battcheck-bike mode. Turn it off and its the same. Replace battery and its so far so good “normal”. Hrmm, ideas?
Unless it’s blocked by the great firewall of China. It should be good business practice to have a vpn to get passed that and a professional guy should have one.
