Help identifying current sensing resistor on driver board

[thinmint]

Hello all :)

I recently purchased a flashlight off of DX as it was on sale and has some nice specs.
It is running an XML T6 diode at 2.5A, resulting a 2.5hr - infinite run time before heat becomes an issue. I don't plan on using the flashlight for greater than 1 minute intervals, and as a result I would like to increase the current to 3.5 or 3.6A.
I believe I should be able to accomplish this by finding and replacing (or adding resistors in parallel to) the current sensing resistor, however I can't seem to identify it and I felt as though I should ask before I start soldering.

The driver board is a ' CX-423B PCB'. Its a 5 mode so Im assuming the modes increases the complexity making it harder to find the current sensor.
Here is a picture of the board; if anyone could identify the current sensing resistor I would be very grateful :)

Image link repaired

You should really crop your photo leaving just the item of interest - Norm

 

[hiuintahs]

Hi thinmint, the picture doesn't show up. See if you can fix that and we can go from there.

 

[thinmint]

Hi thinmint, the picture doesn't show up. See if you can fix that and we can go from there.

That would help wouldnt it.... Fixed :)

 

[hiuintahs]

As Norm mentioned above, see if you can zoom in to the board. Once I see the resistor values, we will be able to tell. Also be sure not to have the resolution no bigger than 800x600 or else......:)

 

[thinmint]

Top right resistor is labeled '103' so 10k ohm, to the left of that is a resistor labeled '101' so 100 ohm, and the bottom right is a 470 so 47 ohms.

 

[hiuintahs]

What's on the other side of the board? Any resistors that have an 'R' on them? I see on this side of the board that you have no inductor. If no inductor on the bottom, then the circuit is not a switching type power supply and the topology would be different than what I am familiar with. And then I'd have to know what those IC's are to know how they are doing the current regulation.

 

[thinmint]

Nothing on the other side of the board - only a metal spring for the battery.

 

[kosPap]

this is not a switching cuurent supply.

these type of boards are DirectDrive and make the modes by PWM (I believe one of the chips is the power one, that uses a sens resistor to define output) and the other one sets the modes.
in that sense - and using a fellow flashaholics experiece with the same boards- it should be the single resistor in the 4 places above the left chip (R6-R9)

BTW it is not certain that will go that high on your target output even with IMR batteries. My buddy did not even get that even when he bridged the resistors trace. 3.2 is realistic by my experiences... My "rantanpla" flashlight almost does that on an IMR 16340