Originally Posted by Admin
Heya Domingo:
When I get the projector in I verify all the diodes are functional and not weak by lighting the array for 15 or so seconds and then looking for dim spots on the wall through an ND filter. Thats one of the benefits of buying 140's - I've never seen a dead or weak diode, quite to the contrary - depending on the binning, some are quite hot. And no, I don't make a special pile for preferential A binned arrays, they go in the pull bin like all the others. No sense in playing favorites.
After that I clear the ESD mat, put on the wristband and heat up the iron which also has the tip tied to ground. So... Pretty safe. The brick is pulled and disassembled then I heat up the solder and pull it off with an ESD safe "Soldapult" thing. If I end up having to heat up a lead longer than 3 seconds I mark the diode to check that it's still functional after its fully extracted. I am exceptionally paranoid when dealing with these things so I desolder one lead on each diode before going back and taking the other lead to give it time to cool down. Problematic diodes that just wont let go of the flex circuit are marked and tested before bagging. Haven't had a dead one yet so I must be doing something right.
Each diode gets the pink spacer removed mostly because its annoying to work around and really makes installation annoying down the road. Most everyone takes them off anyways so I figure I might as well do it in a controlled electrical environment and then I place a .1 wingtip jumper on the leads and put them in individual ESD pink ziplock bags. When shipped They are all bagged up inside another ESD pink bag and shipped with a couple inches of ESD pink shipping foam in whatever shipping box is usable. For US buyers it's a 6x4x3 white cardboard box and for international I use the small flat rate priority box and make a cardboard wedge to hold everything securely. In the event the buyer requests "ultra paranoid" packing I add a Al foil perimeter shield and pack all that in a metalized static bag before putting it in the box.
I have yet to hear of one arriving dead and I'd like to keep it that way., now that is what I call a proper answer to my question. Thank's for the detailed explanation.
If I hadn't just recieved a nasty surprise this morning in the form of a payment I knew nothing about, I would be asking you to send one over , but I'll have to give it some thought. Still, totally worth buying if you ask me.
Domingo.
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Vidal Wolf
