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A-4
SPARCcenter 2000 System Board Manual—October 1994
A
A.3 System Board Jumpers
Refer to Figure A-4 for the location of system board jumpers.
Note – Board jumpers are set at the factory and should not be changed except
for use with factory diagnostic equipment and software.
Pin 1 of each location is identified by a square solder pad.
Figure A-4
Jumper Locations on the System Board
Table A-1 System Board Jumpers
Label
Jumper
Default
Setting
Function
J1400
Pins 2, 3
In
Co12V to RS232 line driver. (Pin 1 = ground, pin 2 = line driver input, pin 3 = +12V
supply.)
J1401
Pins 2, 3
In
Connects –12V to RS232 line driver. (Pin 1 = ground, pin 2 = line driver input, pin 3 = –12V supply.)
J1501
2, 3
In
Pins 1 and 2 are for factory or service depot use only. Pins 2 and 3 are connected if a service
processor does not have a mouse.
J1400
J1401
J1501