It looks like a mix between an 105 and 110, there is no LED and an awfull lot of resistors. It is also allmost impossible to trace the diagram. I found it in a BTG-2 from Z-Bolt. Turning the pot makes no difference in output, any direction whatsoever.
The unit gives a bright stable beam, think close to 5mW. The APC beamsplitter is also the IR filter at the same.
pot side :
http://forum.depolderster.be/inc_php/image.php?id=333
back side :
http://forum.depolderster.be/inc_php/image.php?id=334
Any information would be welcome. So far I haven't touched the board.
I wonder if I can 't just waste teh excisting board and APC and copy the known good old 105 board and connect that tho the diode. Ideas?