Fenix TK20 Advice needed please. Not working.

[MTHall]

This light has its battle scars but has proven dependable for years. A few months ago it started to get dimmer no matter what batteries I used until it just stopped working. My questions are what is it possible to do to fix it, and is there a drop in LED replacement for the lens?
I'm including some images in hopes that it will make it more clear what it is I have to work with.
Thanks in advance for any thoughts.

 

[thermal guy]

One of the toughest lights I have. Can you see if it's a tailcap issue by bypassing the switch?

 

[MTHall]

One of the toughest lights I have. Can you see if it's a tailcap issue by bypassing the switch?

I don't know how to do that. The tail cap makes the usual clicking sound though.

 

[MTHall]

This is what it looks like inside that tail cap

 

[thermal guy]

Take the tailcap off and use a nail or knife blade and touch the back of the battery and the bare metal of the light body. The light body.

 

[thermal guy]

Also see them two holes in the switch? put a pair of needle nose pliers in them and see if the switch is lose. if It's lose that could be it. Mine has done that before

 

[MTHall]

thanks will do that

 

[MTHall]

Just tried that and can't tell but doesn't seem loose to me. Also tried bypassing switch but light doesn't come on. to be honest I don't know the correct term to use but if it is the part that contains the lens, is their a good source for a new one? I would love to know if the Fenix TK20 comes in a bright LED version.

 

[thermal guy]

Not really no. I looked around for someone to modify mine to pump up the output and had no luck. Not that's it's not possible but not really easy to do. It's a shame yours is not working because they are great outdoor lights. The tint is fantastic and it throws well. there old school but great lights.

 

[MTHall]

Not really no. I looked around for someone to modify mine to pump up the output and had no luck. Not that's it's not possible but not really easy to do. It's a shame yours is not working because they are great outdoor lights. The tint is fantastic and it throws well. there old school but great lights.

Thank you for the suggestions. I so agree that they are great lights.

 

[bykfixer]

Fenix made an incan light?

 

[thermal guy]

No this was the really warm LED that came out 12-15 years ago. Forget the name. It's very close to incandescent

 

[thermal guy]

Oh why is this is the. Incandescent Section?😂😂

 

[lightfooted]

It's a TK20.

Bypassing the switch should have lit it up like normal, soo...there's is probably an issue with the driver. It would probably be easier to replace the whole light than to find someone to repair it. You could try a brand new cell, because hey, there is still a chance that all of your cells are old and need to be replaced. A slight chance I guess.

 

[MTHall]

Fenix made an incan light?

Mine is incan

 

[thermal guy]

actually it's not. It's a v warm led that looks like incandescent but she's led a Q4 I think.

 

[yellow]

Of course it is a led

unfortunately "Q4" has no meaning whatsoever (here) - but admitted that comes from all those (cheapo) shops, starting with giving these "infos".
"Q4" for identifying a led is the same, as when someone says "6.2 L" and thus thinks everyone knows he is talking of an early Ford Raptor, color black, with the big V8 engine ...

"needed" info:
led model: Cree XR-E
tint, (actual color temperature): would be anything "W" + another letter, or 1 digit number + one letter (for warm white XR-E models)
and last the
luminous flux group (= output power) .. which could be Q4 (PS: Q4 being good/bright for an xr-e)

 

[Owen]

^^^Right. Though it may be something like a Q4-5A or B(A was rosier, B had more yellow). There weren't a lot of choices back then. Those tints were the first "neutrals", though often referred to as "warm". Warm whites had significantly lower flux rating at the time, as I recall(though my memory is questionable of late!).



Hate to say it, but if you've eliminated the switch, cleaned all the contacts, and tried it with fresh batteries, you may be out of options with that light.

 

[bykfixer]

Give it a few whacks with a mallet.
What the heck, it's already busted, right?

 

[thermal guy]

Easy to spot the incandescent guys on here😂😂