System Board Jumpers - Sun Microsystems SPARCcenter 2000 Service Manual

B
B.3 System Board Jumpers
Default
Label Jumper Setting
J1400 Pins 2, 3 In
J1401 Pins 2, 3 In
J1501 2, 3 In
B-4
Board jumpers are set at the factory and should not be changed except for use
with factory diagnostic equipment and software.
Use Table B-1 to verify that jumper settings are correct. Pin 1 of each location is
identified by a square solder pad.
Table B-1 System Board Jumpers
Function
Connects +12V to RS232 line driver. (Pin 1 = ground, pin 2 = line driver input,
pin 3 = +12V supply.)
Connects –12V to RS232 line driver. (Pin 1 = ground, pin 2 = line driver input,
pin 3 = –12V supply.)
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
Jumper Locations on the System Boar
SPARCcenter 2000/2000E Service Manual—June 1996
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