Alpha Microsystems AM-647 Manual de instrucciones descargar pdf (Pagina 11)

Page 8 Narrow to Wide SCSI Upgrade Instructions

PDI-00440-70, Rev. A01

4. To remove the side panel:

•

Swing the front door open to gain access to the screws that hold the side panel to the

chassis.

•

Remove the four screws along the left edge (behind the front door). Lift the side panel,

slide it to the front, and place it out of the way.

•

To expose the AM-176 board, remove the card cage lid (DWF-20670-00) by removing the

five screws, lifting it out, and placing it out of the way.

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 internal top panel or from

the rear of the display 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 the chassis.

Installing the 68-pin Wide SCSI Bus Cable

To install PDB-00440-71 or PDB-00440-72, use this procedure (instructions for PDB-00440-75 are

below):

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 cutout on the

internal top panel or on the rear of the display panel. Plug the cable into each disk or tape drive.

If you are connecting narrow SCSI devices to a Wide SCSI cable, be sure to use the

appropriate adapter between the device and the cable connector.

4. Mount the new Wide SCSI cable/adapter plate assembly onto the existing SCSI cutout using the

standoffs provided with your upgrade kit.

5. Make sure the Wide SCSI cable is terminated properly. This normally means plugging an

external active terminator into the external Wide SCSI port on the internal top panel or on the

rear of the display panel. This terminator is included in your upgrade kit. Fasten the thumbscrews

to secure the terminator. See Appendix A for more information about SCSI bus termination.

6. If you are adding a disk or tape drive, don’t forget to attach the DC power cables from the power

supply to it. Refer to your computer’s service manual for peripheral installation instructions.

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Alpha Microsystems AM-647 Manual de instrucciones Pagina 11