Amiga 2000 Stealth Fan Instructions


      Tired of listening to that Jet Engine Turbine fan on your Amiga 2000?
   Well, heres a solution I came up with that cuts the fan noise down by
   at least half.  Over the course of the last 6 months, the noise of my
   Amiga 2000 fan slowly increased as the bearings for the fan started to
   make more and more noise.  Since my warranty was out, I decided to go
   ahead and pull the power supply and check out the fan.  To my surprise,
   when the fan is seperated from the power supply and held by hand, it was
   almost whisper quiet, except for the noise the bad bearings generated.
   But when mounted in the power supply, the noise was terrible.  Drawing
   on my experience in the Submarine Navy, I realized that it was a simple
   problem of sound isolation.  The fan had been popriveted onto the
   aluminum case for the power supply.  This direct metal to metal contact
   allowed the noise vibrations to transfer from the fan to the power
   supply, and from there to the rest of the Amiga case, amplifying the
   sound generated by the fan.
      The solution?  Well, I went to the local hardware store and bought
   four 1/8" x 1" round headed bolts with nuts and lock washers and four
   round rubber grommets with a 1/16" slot for the power supply casing and
   a 1/8" hole for the screws. These parts should only cost a couple dollars.
      Now, installation.  First turn the 2000 off and unplug the power
   cord from the rear.  Next, remove the 5 phillips head screws holding the
   cover on, and remove the cover.  There is one screw in the top middle
   of the back, and 2 screws on the bottom of the cover on each side.
   Next, remove the 2 screws on the back of the 2000 for the power supply,
   one is located at the top on the inside edge of the fan, the other is
   at the top, just above the power cord connection.  Now remove the 2
   screws that mount the power supply to the metal mounting bracket for
   the power supply and drives.  These screws are at the front of the
   power supply next to the protective cage.  Now, unplug any power supply
   cords coming from the power supply to the motherboard and disk drives.
   You should be able to remove the power supply now.  Ok, now to remove
   the fan, use a 1/8" or 5/32" drill bit and drill to drill out the rivets
   connecting the fan to the power supply.  Next you need to drill out the
   fan mounting holes on the power supply to accomadate the rubber grommets.
   The grommets I used required a 5/16" hole.  Now install the grommets,
   and mount the fan using the 4 bolts, lock washers, and screws.  I
   found it was easiest to install the bolt at the bottom right corner
   of the fan first.  (Looking from the rear of the power supply)
   Tighten the screws until snug, but don't overtighten.
   One last item, you should trim any of the rubber grommet sticking out
   on the side of the fan cover plate so that the power supply can fit
   snugly against the rear of the 2000.  That's it!  Now just re-install
   the power supply and the 2000's cover.

                                             Glenn Nielsen
                                             CIS  75115,444
                                             BIX  gnielsen