Issue with a2/wiz2-520/17500/mce2s

[xochi]

Hey McGizmo,
Please excuse me if this has been answered elsewhere, I wasn't sure what to search for. I've got an A2 that , for some reason, no longer wants to light with the LE in the in the appropriate position at the base of the reflector. It lights fine if I back out the LE a bit but this causes a ring to appear in the beam since the led is now below the reflector a bit. I've checked for battery compression (even added a solder blob to the 17500 cell) and this doesn't seem to be the problem. My best guess is that the reflector has moved into a higher position in the head OR the light engine has been slightly shortened somehow.

Any suggestions on how to get the light back to working the way it did before?
/ubbthreads/images/graemlins/icon23.gif

 

[Darell]

xochi -

I'm not Don, but I can pretend for this answer...

The reflector has most likely moved forward. The appropriate position for the LE is when the back of it is flush with the back of the head. With the LE out of that position, the power cannot be passed from the battery tube to the LE. (To demonstrate this for yourself, take the LE out of the head, and place it on the top of a battery tube. It needs to be fully seated in there to light.) If that isn't also at the base of the reflector (which seems to be true since you say you can back it out and make it work), then the reflector needs to be moved back down to where it should be. For this very reason, I now epoxy the reflectors into the A2's that I build.

So here's what you do: Remove the bezel ring, the window, the o-ring and the reflector. Position the LE where it is flush with the back of the head (confirm it is in the correct location by screwing the head onto the body and making sure it lights. Now drop the reflector into the head, down onto the LE. Put the O-ring in place, and cinch down on the bezel ring until everything is held in place. Presto.

 

[McGizmo]

What Darell said! /ubbthreads/images/graemlins/grin.gif

Compression of the window O-ring around the lip of the reflector will keep it from dropping forward but the reflector can be forced forward and out of proper position by driving the LE too far nto the head. There reflector will then remain out of proper position. In making allowance for 5W LE's the system has this achilles heel. Sorry. /ubbthreads/images/graemlins/icon15.gif

 

[Kiessling]

So .... my beloved LuxV LED causes these traumatic experienes? Oh my ... I feel so bad ....... NOT /ubbthreads/images/graemlins/grin.gif /ubbthreads/images/graemlins/grin.gif
bernie

 

[Darell]

Yup - Bernie's fault! Fixing the reflector at the precise Lux3 position would have been dreamy... but no. /ubbthreads/images/graemlins/frown.gif

 

[mut]

You can also put the LE into the head where you want it then put a ring of wire around and inside the bottom lip to make good contact.


mut

 

[xochi]

Excellent! Thanks Darell/McGizmo/mut for the help. I haven't tried the repositioning of the reflector yet but the advice sounds right on the money. I'll let you know....

I did what you recommended Darell and the light is good as new. Thanks!