Alpha Microsystems AM-647 Manual de Instruções descarregar pdf (Página 13)

Page 10 Narrow to Wide SCSI Upgrade Instructions

PDI-00440-70, Rev. A01

PEDESTAL CHASSIS

This section describes how to install the Wide SCSI cable kit (PDB-00440-73) in a pedestal chassis.

While your computer's hardware is exposed and the AC power cord is unplugged, the components

are vulnerable to damage caused by static discharge. Before you handle any computer hardware,

make certain your work area is properly protected against static discharge.

Accessing Your Hardware

1. Power down your computer and unplug the power cord.

2. Lay the computer on its side with the bezel facing away from you. We recommend that you place

the chassis on a padded work surface.

3. Let the feet from the pedestal hang over the edge of a table, or remove them.

4. Remove the cover, as follows:

•

Looking at the computer from the back, remove the three screws on the right side of the

cabinet that hold the top cover to the chassis.

•

Remove the top three screws on the left side of the cabinet. Two of these screws are

attached to the computer's mounting feet.

•

Remove the small screw near the center top of the back panel, just to the right of the

chassis slot marked E.

•

Lift the cover slightly and slide it off toward you. Remove it and set it aside.

Removing the 50-Pin SCSI Bus Cable

Observe the routing of the existing SCSI cable before you remove it—you will route the Wide

SCSI cable along the same path.

1. Remove the bail mount clips for the external SCSI connector from the rear panel.

2. Unplug the 50-pin SCSI bus interface from P2 on the AM-176 board.

3. Unplug all the SCSI devices connected to the SCSI bus cable. Also remove any adapters being

used to attach Wide SCSI devices to the narrow cable.

4. Remove the 50-pin SCSI cable from your system.

Installing the 68-pin Wide SCSI Bus Cable

1. Plug the 68-pin Wide SCSI bus cable into the connector at P5 on the AM-176 board.

2. Route the Wide SCSI bus cable over the top of the bracket so it cannot interfere with the fan on

the AM-176 board.

3. Route the Wide SCSI cable to the SCSI peripherals and out to the external SCSI adapter plate on

the rear panel. Plug the cable into each disk or tape drive.

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Alpha Microsystems AM-647 Manual de Instruções Página 13