DX AMC7135 1400mA soldering

[Tedfs]

I'm currently in the process of trying to mod a Surefire LX2 with an XM-L. After killing two emitters trying direct drive, I'm thinking a modded AMC7135 1400mA board may be in order. Not clear why the emitters are burning up as I've modded two seperate Surefire x300 lights with direct drive XM-L
emitters and have had no issues. Might be the LX2 double mode tailcap..

I've got plenty of PCB to rob one and stack the AMC chips to get 8 total. However, I have no idea where to solder
positive and negative leads. I do see the - symbol but am unclear which section to solder for negative
and where to solder for positive.

Could someone please point out the correct locations ? Mine are similar to the one below save for the
Q1, Q2, Q3 and Q4 being printed differently.

 

[Flucero28]

Ted, the negative lead gets soldered to the sliver pad just right of the - symbol. Positive lead can be soldered to the small silver pad located next to the via or hole in the center of the board.

 

[Tedfs]

Thank you very much !

[Edit]

That did the trick. One of those boards with 4 extra chips sandwiched on and soldered to the locations you pointed out resulted in successfully modding an LX2 to run an XM-L and not kill the emitter. The original functionality of the tailcap works as was designed.

[/Edit]

 

[Flucero28]

No problem bud, glad to hear you had success! If you get a chance, post a pic or two of that bad boy. I would love to see the result!