DEC DECpc 433 Service Manual page 105

SCSI Expansion Box FRU Replacement
To replace a 3.S..inch SCSI device, do the following:
5. Attach the SCSI device to the mounting tray (see Figure
4-9.
6.
Position the mounting tray in the chassis and secure it
with the mounting screw previously removed (see
Figure4-8.
7. Connect the power and internal SCSI connectors and
then remove all identification tags (see Figure 4-7).
8. Replace the cover.
Power
Supply
To remove the power supply, do the following:
1. Remove the cover.
2. Tag and disconnect the power supply cables to all SCSI
devices.
3. See figure 4-10 and remove the two power supply
retaining screws.
4. Carefully lift the power supply from the chassis.
4-16 DECpc 433 Workstation Service Guide