TK's Emisar D4 review

Wasnt able to reset password. New problem. The light had problem with switching off after got warm, and had been turning on often, but last time it just couldnt turn off so i had to twist head off. I contacted hank but he only said to take bezel off and look there for some screws, but i dont even know what bits to buy, are they philips or waht. This being asked, hank evaporated disappear. Very pity that i actually sent him the whole amount too fast.

Said:
Looks like there is short somewhere, would you please unscrew the bezel, take
the optic out, then try to take those two screws out, and see if it will work fine again.
But when the screws are not there, please use the low mode only, not the turbo mode.

If the light is stuck at a bright mode and won’t turn off, it generally indicates one of two problems:

  • There is an unintended connection somewhere, allowing power to bypass the driver entirely. If this is true, then the light should act like a 1-mode twisty — tightening the tailcap would turn the light on at a very high level, without even pressing the button.
  • A button wire is broken or shorted or disconnected. If tightening the tailcap causes the light to blink then turn off, but it doesn’t respond to button presses, this is probably the issue.

Yeah, but what now. I am not tecnically teached to repair this pos, and hank doesnt give a f.

There was a week long holiday in China. Everyone is just getting back to work.

Most flashlights are easy to take apart. I’m sure someone here can walk you through opening up a D4 if you ask. It is probably somewhere in this thread…

Username DOESN’T check out :person_facepalming:

Yeah, not sure who that is, but it seems the account was created just to complain about the guy who runs Emisar.

What Hank said was probably correct, and is likely a useful answer. Sounds like something broke, and it’s one of two types of electrical shorts. It should be relatively easy to fix.

To add to the list of possible reasons a light would fail to respond to clicks and exit turbo mode, my friends D4 did the same thing after I accidentally popped off the R5 and R4 resistors while disassembling for an Anduril flash. We managed to get R5 back on, and we thought we got R4 back on as well, but it only looked like a good connection, actually it was open circuit.

With R4 essentially unpopulated, the light seemed to run fine, except it would not enter any strobe modes, and once you entered turbo, the only way to exit was to disconnect power. Very strange. According to zeroflow, “R4: MOSFET current-limit”. So this would seem to make sense?
Who knows. I fixed the connection properly and it’s back to normal now. Just thought I’d chime in with my experience.

Well, i couldnt find. But were there any torx screw? U sure remember!

d4buyer. Ok? Cant remember password.
unintended connection somewhere, allowing power to bypass the driver entirely. - how is it easy to fix? I am just an office worker, so i am trying to get answer, as hank is silent for over two months. Just got tired of nokia as a light.

“just an office worker”, we all started somewhere, the first step is to realize you aren’t “just” anything… your potential is unlimited. :wink:

Its good but no time

Tint mixing is so hot right now :sunglasses:

SST20 3000K and 4000K both 90+CRI

Ooh nice! I’ve been thinking of doing this, but with 3 4000k nichias, and one 3000k Nichia, just to bring it down a little. Thoughts?

Yeah, nice. Do you like it X3? I really like this sst-20s. I was thinking of 2 3000k and a 4000k if the FW3A is ready someday.

Seems to me it was ToyKeeper that started the tint mixing thing with her Terminator. :wink:

I also did it years ago with a ridiculous Quad XHP-50 set up in a Lucky Sun D80. Very neat look, had to keep it reduced using 2 18350’s as with 2 18650’s it’d make the light too hot to hold in mere seconds.

This bothers my OCD :laughing:

It’s nice and even though! Lol I like it

This was one mighty fine little light. Got mine today and I’ve played some with it. Only problem I see is that it ramps very quickly down from high levels since it get hot.

I also read a thread on laser forum where a guy got a 1watt laser into his eye and got permanent damage. This sounds really scary and I got to think of dangers with powerful flashlights like this and kids. Is it safe to let my kiddo use this? She’s 4 and really liked this little light, told here to not touch the button on it and use it at the level I set for now and I’m watching all the time. Am I paranoid?

No you shouldn’t give this light to kids. My daughter is 7 and is not allowed to play with my D4 and other hot rods.