back to war...saturday, 11.05 am! When the subject started this morning about security elevators (Restricts access to private floors) this hinch was 2 hours away..now...(either in the garage for the elevators access, either inside the vault facilities, main problem is the remote monitoring doors, right?...first image..the main board) now inside the board, and don't forget the silcione grease to open the anti tampering epoxy resin...we have this circuit. On this circuit...we have...the preset password jumper ....the idea...theorical...is to flah this with Infra Red light...to give error to the opticelectrical control.

source
http://claddaghelectronics.com/printed-circuit-boards/48-remote-monitoring-board.html