Alpha Microsystems AM-990 Manual de servicio - Página 5

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2.2Opening the Top Cover

In order to remove the side panel, you must first remove the computer's top cover. The

procedure for removing the top cover is as follows:

1.Swing the front door open to expose the screws that hold the top cover in place.

2.Using a phillips-head screwdriver, remove the two screws that connect the top

cover to the chassis as shown in the illustration.

3.Don't worry about the display panel, it is not attached to the top cover. However,

make sure the key for the security lock is not inserted in the lock when you

attempt to remove the top cover.

4.The top cover is held in place with four locking tabs, one at each corner. In order

to release the locking tabs, the top cover must be slid forward as indicated by the

arrow. The best way to do this is to use the palm of your hand to firmly strike the

rear corners of the top cover. This will cause the top cover to slide forward.

To protect your hand, place some type of padding over the rear corners of the top

cover.

5.Once the top cover slides forward, pull straight up to remove it.

6.Place the top cover out of the way so it will not get damaged. Make sure you do

not bend the locking tabs.

2.3Opening the Side Door

To install optional boards, disk drives, backup devices, or to service the computer, you'll

need to remove the left side panel as shown in the illustration on the following page:

1.Remove the four screws that secure the left side panel to the chassis.

2.Like the top cover, the left side panel must be slid forward in order to be removed.

3.Using the palm of your hand, firmly strike the rear edge of the side panel as

indicated by the arrow.

4.Once the panel slides forward, it can be removed by lifting straight up.

5.As with the top cover, make sure none of the alignment tabs on the side panel get

damaged.

AM-990 VME Computer Service Manual

DSS-10523-00, Rev. A00