Specifications
Page 4-4 AM-3000 VME Hardware Installation
4.2.1Installing the AM-987 Board
With the AC power cord unplugged and the top cover removed, the components inside
your computer are vulnerable to damage caused by static discharge. Your body and
clothing are capable of storing an electrical charge that can damage or destroy
unprotected electronic components. Prior to handling any computer hardware, be sure
you and your work area are properly protected against static discharge. There are a
number of commercially available static protection devices designed specifically to
protect your equipment from harmful static discharge.
When installing the AM-987 board, make sure all the pins are properly aligned. If you
plug the board in incorrectly, it is possible to short power to ground, resulting in possible
damage to the AM-987, AM-185 or AM-185-50 boards.
1.Though not absolutely necessary, it may be easier to do this installation by
removing the AM-185 or AM-185-50 board from the system chassis. If you
remove the CPU board be sure to note the orientation of any other cables
that may be installed, before unplugging them from the CPU board.
2.The main CPU board is held in place with two screws, but before you
remove the two screws, you should first unfasten the I/O rear panel from
the computer. It is not necessary to remove all the I/O cables connected
to the rear panel; the objective is simply to move the rear panel just
enough so that the CPU board can be unplugged and removed.
3.Remove the two screws holding the main CPU board to the rear panel,
then unplug the CPU board from the motherboard and remove it.
4.Next, the 68030 CPU chip must be removed from its socket. (AM-185-00 =
U97, AM-185-50 = U123). To remove the chip, gently pry the chip loose
using a small flat blade screw driver. Work around the chip lifting from
corner to corner and side to side until the chip pops loose from the socket.
Don’t rush this operation, if too much force is used you could break some
of the pins or the ceramic case on the CPU chip.
5.Before installing the AM-987 board on the main CPU board, you must
install two hardware items on the solder side of the AM-987 board. These
items are required for board support and stabilization when the AM-987 is
installed on the main CPU board. If the board is being mounted on an
AM-185-00 CPU board, then you’ll need to install a rubber bumper and a
plastic standoff. If the board is being installed on an AM-185-50 CPU
board, then you’ll need to install two rubber bumpers without the standoff.
Refer to the following illustrations for hardware mounting locations. Note
that the rubber bumper located near connector P1 must be cut in half
prior to the installation. This is required to prevent the conductive adhesive
on the bumper from touching any of the pins on the bottom of X-Bus
connector P1.
PDI-00172-60, Rev. A02