TK40 gives a strange SOS

CZ · Jan 15, 2010

Hi All,

I recently bough a TK40 and when using the SOS function it gives 3 flashes and 1 normal flash and 2 very bright flashes and then again 3 fast flashes.

The slow flashes are different, 1 normal flash and 2 very bright flashes. I think it's not correct. All the flashes should be of the same brightness, right?

Are there more users that have this problem with their Fenix TK40? What can I do to resolve this "problem" ?

Overall it's a fantastic light!!

CZ

Locoboy5150 · Jan 15, 2010

Hmmm, that is strange. My TK40's SOS flashes are all at the same brightness, or at least as far as I can tell with my eyes. I don't know how to fix that aside from maybe cleaning the threads on the tail cap and head.

HKJ · Jan 15, 2010

CZ said:
Hi All,

I recently bough a TK40 and when using the SOS function it gives 3 flashes and 1 normal flash and 2 very bright flashes and then again 3 fast flashes.

The slow flashes are different, 1 normal flash and 2 very bright flashes. I think it's not correct. All the flashes should be of the same brightness, right?

Are there more users that have this problem with their Fenix TK40? What can I do to resolve this "problem" ?

Overall it's a fantastic light!!

CZ

Nice catch, I believe that all TK40 has it. It found it on my (early) model and documented it in my Danish review.

It looks like this when recorded with an optic sensor (The red bars are the normal levels):

was.lost.but.now.found · Jan 15, 2010

Yes, mine does it as well. It has been documented all over CPF so it likely is all of them. I just can't see how this was missed during testing.

CZ · Jan 15, 2010

HKJ,

That is exactly what I'm experiencing!! The 2 last flashes of the "O" look like a strobe flash that dies out to normal level.......

Anyway thanks for clearing this up, I thought I had a lemon....... Looks like most of the TK40s have this "special feature".......

I wasn't able to find this on CPF.......I must have missed it in my searches....

CZ

TK40 gives a strange SOS

CZ

Newly Enlightened

Locoboy5150

Flashlight Enthusiast

HKJ

Flashaholic

was.lost.but.now.found

Enlightened

CZ

Newly Enlightened

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