Researcher Lorain:
After you go up to the 2nd floor and pass the crossroads, you will see an intersection where 3 roads meet. Go to the right and you should be able to see the broken pieces of the machine. Be careful, though -- the alarm system in that area may be still functional. If you let the alarm ring, your life may be in danger.
To disable it, enter the passcode number 3196 into the alarm device. Be careful!