Ilot3 @ 12.13.17, 19:26
You need to look at the new head from the side. There are three contacts closed by a drop of solder. So, before use, this transportation protection must be removed by heating a drop with a soldering iron and opening these three points. In the picture they are already open. Yes, and most likely you will not have to carry out such a procedure on a freshly purchased laser, because everything can be done already.
Listen, but there’s such a drop, now I’m trying to remove it right away, God forbid that this is it)