KD SSC P7 Driver

[JoelSim]

Hi all,

Looking for some advice/trouble shooting ideas regarding the driver I am using for my light mod.


I know that at least Packhorse has used these drivers (as I got the idea from him), but I'll guess others here will have some input also.


I have previously had this set-up running and working fine, but then after a necessary re-build of the canister and light head I've come across some strange issues with the drivers. Upon connecting everything up I have had a couple of different things happen.


1. Nothing at all. But then upon testing with multi meter I discover that somewhere between the - supply attaching to the driver and the - going to the LED I guess I loose connection. That is if I test + & - going to the LED I get nothing, but if I keep multi meter on the + on LED and ground further back down the line I then get a reading (sorry for my bad explanation).


2. All was actually working properly (with another driver), then it sat for a couple of days and then upon re-connecting the light flashed on and cut off. This has now left me with the same scenario as point 1.


All of this leaving me rather confused and frustrated, especially since it has worked previously.


Below is the link to the drivers and also some pics.


Link to driver:

http://www.kaidomain.com/product/details.S006371




Above: + & - from battery and switch, etc.....


Below: + & - to LED (XM-L). (Orange and ? is a resistor(I think) that mine don't have. Not sure if that's important or not though)

Does any of this make any sense to anyone??


Cheers,
Joel.

 

[lucca brassi]

in orange circle is capacitor , resistor are mostly black with white numbers

 

[JoelSim]

in orange circle is capacitor , resistor are mostly black with white numbers

Fair enough. Resistor was just a guess :)

 

[DIWdiver]

The larger capacitor (below the one you circled) looks like it may be off the pads, and shorted to the resistor further below.

 

[JoelSim]

The larger capacitor (below the one you circled) looks like it may be off the pads, and shorted to the resistor further below.

Yeah ok I'll check that out on mine. The pics above I took from the KD website, just for illustration purposes.

Cheers.

 

[b-bassett]

just to let you know, all the recent drivers iv had (both 3 + 5 modes) seem to have a problem running at medium,

they will only work for about 5 secs befor cutting down to low, almost as if they are overheating.

i think there might be a dodgy batch floating around

also, im not sure yours will work without that capacitor, looks like its between the led -ve (fet drain) and the batt -ve

sounds to me like the fet isnt switching on, thus the led -ve isnt connecting to the bat -ve.
can you test to see if you get a volt drop directly across the fet? (drain to source) or alternativly, test from led -ve to ground.

hope that makes sum sense

 

[JoelSim]

just to let you know, all the recent drivers iv had (both 3 + 5 modes) seem to have a problem running at medium,

they will only work for about 5 secs befor cutting down to low, almost as if they are overheating.

i think there might be a dodgy batch floating around

also, im not sure yours will work without that capacitor, looks like its between the led -ve (fet drain) and the batt -ve

sounds to me like the fet isnt switching on, thus the led -ve isnt connecting to the bat -ve.
can you test to see if you get a volt drop directly across the fet? (drain to source) or alternativly, test from led -ve to ground.

hope that makes sum sense

Thanks for your reply and the heads-up.


Ok....so I'm not sure I understood completley as I am a little electronically impaired, but I'll explain what i've tested and supply a picture and see where we end up.


In the pic I have circled in yellow what I am assuming you were refering to as the 'fet'. Please correct me if I am wrong.


In green circles you will see where I tested from - on LED and ground back to where green circles are. Got a voltage reading (pretty much that of the battery).


Red circles indicate where reading was 0 while testing from - on LED and back to those places.


Is this the type of test you were meaning?


I've also e-mailed Kaidomain with the pictures of the drivers with missing capacitors and we'll see what sort of response comes from that.

Here's the pic:

Cheers,
Joel.