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Preparing for Installation or Service
1-3
1
Figure 1-1
End and Side Views of the System Board
All system boards are basically the same. No jumper changes are necessary. A
board can be moved to any slot in the card cage for troubleshooting.
However, the system architecture requires that one system board serve as the
system master (being a major part of the bus arbitration system.) Also (in most
cases), the OBP master is found on the system master board.
1.3.1 System Master Board
To determine which board is system master and for a list of system master
requirements, Refer to Section D.1, “System Master Board.”
1.4 Replacement Parts
Table 1-2 lists part numbers for replacements. Replaceable parts are shown
with dotted outlines in Figure 1-2, which shows their relative locations on the
board. These items include SuperSPARC modules, SIMMs, SBus cards, the
OpenBoot PROM and the system board itself.
System error messages may specify non-replaceable components by part name,
but these components cannot be replaced in the field. If any non-replaceable
component fails, replace system board.
XDBus™
connector 1
SBus
slot 0
Diagnostic LEDs
RS232 connector A
Keyboard and
mouse connector
RS232 connector B
SBus
slot 1
SBus
slot 2
SBus
slot 3
End view
Top view
0
1
2
3
BAR CODE
A
B
Super
SPARC
module
B
XDBus
connector 0
SIMM banks
0 and 1
Super
SPARC
module
A