Removing A System Board - Sun Microsystems Ultra 1 Creator Series Service Manual

Note – The NVRAM/TOD clock contains the system host identification (ID) and
Ethernet address. If the same ID and Ethernet address are to be used on the
replacement system board, remove the NVRAM/TOD from the defective system
board and install it on the replacement system board after the replacement system
board is installed.
10.1.1

Removing a System Board

1. Power-off the system.
See Section 6.2 "Powering Off the System" on page 6-2.
2. Disconnect all cables, excluding the power cable, from the back of the system or
server unit.
3. Remove the unit cover.
See Section 7.1 "Removing the Cover" on page 7-1.
4. Attach a wrist strap.
See Section 7.2 "Attaching the Wrist Strap" on page 7-2.
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.
5. Depopulate the system board as follows:
a. Remove the NVRAM/TOD with carrier.
See Section 10.2.1 "Removing a NVRAM/TOD" on page 10-12.
b. Remove all SBus card(s).
See Section 10.3.1 "Removing an SBus Card" on page 10-14.
c. Remove all DSIMMs.
See Section 10.5.1 "Removing a DSIMM" on page 10-24.
d. Remove the FFB card (workstation only).
See Section 10.4.1 "Removing an FFB Card" on page 10-19.
6. Disconnect the following:
a. SCSI cable.
See Section 8.5.1 "Removing the SCSI Cable/Backplane Assembly" on page 8-19.
10-2 Ultra 1 Creator Series Service Manual • August 1996