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D-2 Sun Fire V120 and Netra 120 Server User’s Guide • December 2001
The Netra T1 server’s system board contains several jumpers.
We do not recommend you change the jumper settings. However, for reference, the
factory-default settings are listed in
TABLE D-1, and the locations of the jumpers are
shown in
FIGURE D-1 (which also illustrates the default settings).
TABLE D-1 Factory-Default Jumper Settings
Jumper Default Setting Description
JP8 1-2 (Open)
3-4 (Fitted)
This is the factory default setting for replacement system
boards. It identifies the system to OpenBoot PROM and Solaris
as a Sun Fire V120 server. If you are installing a new system
board for a Sun Fire V120, make sure that the jumpers match
this setting.
1-2 (Fitted)
3-4 (Open)
This setting identifies the system to OpenBoot PROM and
Solaris as a Netra 120 server. If you are installing a new system
board into a Netra 120, you must set the jumpers on the
replacement board to match this setting. (Note that the factory
default setting is for the Sun Fire V120, not for the Netra 120
system. This is why you must change the setting before
installing the new board.)
JP7 1-2 (Open)
3-4 (Open)
5-6 (Fitted)
This jumper setting tells the system that its main processor is a
550 MHz CPU. Do not alter this setting. It is correct for the CPU
on your system board.
1-2 (Open)
3-4 (Fitted)
5-6 (Open)
This jumper setting tells the system that its main processor is a
650 MHz CPU. Do not alter this setting. It is correct for the CPU
on your system board.
JP9 1-2 (Fitted) This jumper is for use by Sun engineers in the development of
OBP software. Do not alter its setting.
JP13 1-2 (Open) This jumper is for use by Sun service engineers. It resets the
LOM device. Do not alter this setting.
JP14 1-2 (Open) This jumper is for use by Sun service engineers in the event that
the LOM device on the system board is broken. The default
setting is Open. If you alter this setting to Fitted, then, if the
LOM is broken, you can use the On/Standby rocker switch to
power the system on (or down to standby mode). Note that the
power signals from the On/Standby switch pass through the
LOM device, and that setting this jumper to Fitted causes the
signals from the rocker switch to bypass the LOM.