Removing The Scsi Cable/Backplane Assembly - Sun Microsystems Ultra 1 Creator Series Service Manual

8.5.1

Removing the SCSI Cable/Backplane Assembly

1. Power-off the system.
Section 6.2 "Powering Off the System" on page 6-2.
2. Remove the system unit cover.
See Section 7.1 "Removing the Cover" on page 7-1.
Caution – Use proper ESD grounding techniques when handling components. Wear
!
an antistatic wrist strap and use an ESD-protected mat. Store ESD-sensitive
components in antistatic bags before placing it on any surface.
3. Attach the wrist strap.
See Section 7.2 "Attaching the Wrist Strap" on page 7-2.
4. Remove the drive bracket from the chassis.
See Section 9.2.1 "Removing the Chassis Bracket" on page 9-5.
Caution – Each drive slot has a unique SCSI target address (lower drive slot is
!
target address 0, upper drive slot is target address 1). Make note of the drive slot for
each disk drive. Installing a disk drive into the incorrect drive slot could result in file
system or system boot problems.
5. Remove the disk drive assembly.
See Section 9.1.1 "Removing a Disk Drive" on page 9-1.
Note – If the system is configured with two disk drives are, remove each.
6. Disconnect the following (
a. The peripheral power cable (P4) from the backplane assembly connector
marked PWR.
b. The diskette cable (if present) from the backplane assembly connector marked
FLOPPY.
and
FIGURE 8-14 FIGURE 8-15
Chapter 8
):
Major Subassemblies 8-19