Locating A Failing Simm; Jumper Configuration; Table A-1 Simm Group Organization; Table A-2 System Board Jumpers - Sun Microsystems SPARCserver 1000 Manual

A.1.2 Locating a Failing SIMM
A.2 Jumper Configuration
Label Jumper
J1200 Pins 2, 3
J1201 Pins 2, 3
J1100 Pin 1 to ground
J1101 Pin 1 to ground

Table A-1 SIMM Group Organization

Group
Group 0
Group 1
Group 2
Group 3
When a SIMM (or NVSIMM) fails during the power on self-tests (POST), the
SIMM location number (also known as J or U-number) and system board card
cage slot number are displayed on the TTY terminal and saved in
/usr/adm/<filename> messages.
Note – Jumpers are set at the factory and should not be changed except for use
with factory diagnostic equipment and software.
Use Table A-2 and Figure A-2 to verify that jumper settings are correct. Pin 1 of
each location is identified by a square solder pad.

Table A-2 System Board Jumpers

Default
Setting Function
In Connects +12V to RS232 line driver. (Pin 1 = ground, pin 2 = line
driver input, pin 3 = +12 V supply.) Used to power the RS232 ports.
In Connects –12V to RS232 line driver. (Pin 1 = ground, pin 2 = line driver
input, pin 3 = –12 V supply.) Used to power the RS232 ports.
Out Holds processor A in reset so the other processor can be tested.
Out Holds processor B in reset so the other processor can be tested.
Configuring SIMMs and Jumpers
Location
J2800, J2900, J3000, J3100
J3200, J3300, J3400, J3500
J3600, J3700, J3800, J3900
J4000, J4100, J4200, J4300
A
A-3