Hi Roy
Actually PCB removal is a doddle. At least it is on any Sten with a user-swappable cable. All you need to do is:
- Remove the front bezel ring, polycarb screen and gasket.
- Remove rear panel and switch ring, take care with ball bearing and tiny o-ring, disconnect the cable.
- Place the lamp body on a warm radiator for a while to soften the thermal tape that holds the PCB to the body.
- Gently poke the PCB through the cable hole, don't use anything sharp or metal, a wooden chopstick is ideal. Don't apply large force, if it won't budge pop the lamp body back on the warm radiator for a while longer.
When reassembling ensure you remove all traces of thermal tape from the PCB and the lamp body, and replace with a piece of new thermal tape cut to the correct size.
If it's an older (and we're talking 10+ years old now) model with the non-user-swappable cable then the same process applies but you have to chip out the epoxy holding the cable in. It is tricker and poses much more risk of damaging the PCB.
Emitters are all surface mount and you'll see three versions, identifable as:
Big dome shaped Luxeon III - original lamp
Miniature LED chip mounted on carrier board - original lamp that has been upgraded (will also have been upgraded to user-swappable cable)
Miniature LED chip mounted directly on PCB - later Luxeon Rebel lamp (has user-swappable cable and also identifiable by shallower profile body).
You have both lamp body types, PCB carriers and emitters in that parts package IIRC.
Sten were reluctant to provide complete PCBs, even though it would have made repairs and upgrades much easier.
my orders are to sit here and watch the world go by