light problem diagnosis help please.

spear 'clone' was working normally 6 months ago, has just sat unused for months.

went to use it today and it comes on but.

when i put it into 'high' mode, it drops into low mode after 2 seconds and then blinks slowly?

ive tried good batteries and it does this same behaviour with them all?

when i short the back of the light (bypassing the switch) it does the same thing?

light engine and all looks normal?


new driver?

Bad contact somewhere in the head maybe, or dirty / corroded battery contacts?

I'm not familiar with this light, but I'm guessing it thinks the battery is low for some reason - as you've tried it with fresh batteries, my money's on the contact points.

Clean all the thread.

i gave it a good clean all over with electrical contact cleaner,

problem is still there.

the l.e.d. seems to be sitting on a white round piece of plastic/cardboard ??

and is held in place by the rear of the reflector (pressure/clamped), when i remove the reflector the l.e.d. can be easily moved away from the heat sink.

is this normal?

drops out of high mode in about 2 seconds, then blinks in low?

ill just make it direct drive if the driver has failed, but the low is quite useable if i can get the light to work normally again.

is the driver board meant to be soldered/attached to the rear of the heatsink

or is it meant to be loose?


73 views and almost no one has even an idea what the issue is?

Any chance of pictures?

i killed it :mecry:

bottom line is, i couldnt get the light to work normally,

so

i connected the l.e.d. straight to the 3.7v freshly charged battery.... the l.e.d. was bright for about half a second and then dim...very dim, i could see it producing about 1/4 of 1 lumen but almost nothing.( i thought the l.e.d would handle 3.7v?)

im glad its only a $40 light.

but id like to get her working again if anyone has any ideas?

i could mail the heat sink and driver to someone and have them instal a new l.e.d and solder if anyone is interested?


pm me if you have an l.e.d. that will work and are good at soldering.:candle:

Freshly charged LiIon means ~4.2v, not 3.7v. LEDs come in many different voltages - direct-driving it without researching your particular LED wasn't a smart idea. Note also that they can't limit their own current consumption at all well; if you don't have at least a resistor in the way...

Erayd said:

Freshly charged LiIon means ~4.2v, not 3.7v. LEDs come in many different voltages - direct-driving it without researching your particular LED wasn't a smart idea. Note also that they can't limit their own current consumption at all well; if you don't have at least a resistor in the way...

Click to expand...

so can you recc a new LED to direct drive?

waddup said:

so can you recc a new LED to direct drive?

Click to expand...

I have no idea what recc means, can you clarify please?

Erayd said:

I have no idea what recc means, can you clarify please?

Click to expand...

recommend.

waddup said:

recommend.

Click to expand...

Aaah - I can't help you there unfortunately, I don't know enough - you'll need to wait for someone else to jump into the thread.

Erayd said:

you'll need to wait for someone else to jump into the thread.

Click to expand...

already had 180+ views, i think im on my own :candle:

Maybe your light is nothing wrong.
Try new battery, after you charge the battery, it should be 4.2 volt.

glockboy said:

Maybe your light is nothing wrong.
Try new battery, after you charge the battery, it should be 4.2 volt.

Click to expand...

waddup said:

i killed it :mecry:

bottom line is, i couldnt get the light to work normally,

so

i connected the l.e.d. straight to the 3.7v freshly charged battery.... the l.e.d. was bright for about half a second and then dim...very dim, i could see it producing about 1/4 of 1 lumen but almost nothing.( i thought the l.e.d would handle 3.7v?)

im glad its only a $40 light.

Click to expand...

now im looking for a new LED.

"3.7v freshly charged battery" is a dead battery.

glockboy said:

"3.7v freshly charged battery" is a dead battery.

Click to expand...

it reads 4.2. with my DMM. but sais 3.7 on the side

moment.


:nana:

"The tank was over flowing, but the gauge still read empty!"

Do you have any other battery?

His LED is dead now mate...