Grass Valley PDR 200 Service Manual - Manual (Page 108)

Chapter 6 Parts Removal and Replacement
6-16 PDR 200 Service Manual
SCSI Backplane
The SCSI Backplane mounts to stand-offs on the disk drive tray. This Backplane
provides power and control and data signals for the media hard disk drives. The
Backplane receives power and signals from the system and routes them to individual
connectors for each hard disk drive. Removal and replacement of the SCSI Backplane
does not require removal of the chassis from the rack or removal of the rear cover.
Removal of the Floppy Disk Drive and the Distribution Board requires removal of the
SCSI Backplane.
To remove the SCSI Backplane:
CAUTION: Media disk drives are very sensitive to shock. To prevent damage, do
not drop or bang a drive when handling.
1. Perform steps 1-4 of the media disk drive removal procedure (page 6-14) for all media
disk drives, being sure to mark the locations of all of the drives (1 in Figure 6-9,
page 6-15).
2. Disconnect all cables from the SCSI Backplane (1 in Figure 6-10).
3. Use the Torx tool with the T15 tip to remove the screws which secure the SCSI
Backplane to the stand-offs on the disk drive tray (2 in Figure 6-10).
4. Move the SCSI Backplane toward the rear of the chassis to clear the flange on the disk
drive tray and then lift it up and out of the chassis.
To replace the SCSI Backplane:
1. Position the SCSI Backplane over the stand-offs on the disk drive tray, being sure to
clear the flange on the front of the tray and aligning the SCSI Backplane mounting
holes with the stand-offs.
2. Use the Torx tool with the T15 tip to attach the SCSI Backplane to the stand-offs.
3. Connect all cables previously removed to the SCSI Backplane (Figure 6-10).
4. Referring to Figure 6-9 for placement, replace the media disk drives.
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