Service manual
Appendix C Functional Description C-29
FIGURE C-6 Ultra 2 Series Motherboard Block Diagram
C.5 Jumper Description
Jumper configurations can be changed by setting jumper switches on the
motherboard. The motherboard’s jumpers are preset at the factory.
A jumper switch is closed (sometimes referred to as shorted) with the plastic cap
inserted over two pins of the jumper. A jumper is open with the plastic cap inserted
over one or no pin(s) of the jumper. The following figure shows the different jumper
settings that are used on the motherboard.
DSIMM U slots:
0601,0701,0401,U0501
0602, 0702, 0402, 0502
0603, 0703, 0403, 0503
0604, 0704, 0404, 0504
SBus slot 0
SBus slot 1
Audio ports
Parallel port
K/B
SCSI
Fan
Power
supply
Back panel
J2203
TPE
MII
J2204
NVRAM/TOD
UPA slot J2701
SBus slot 2
SBus slot 3
Fan
Fan
CPU 0 J2801
CPU 1 J2901
Fan
LOWER Disk drive 0 + 1
MIDDLE Diskette drive
UPPER CD-ROM drive
Speaker
Disk drive sd0
J3201
Disk drive sd1
J3202
Side panel
Side panel
Front panel
J2104
J2105
J3101
J3001
J3102
J3002
J2503
J2501
J2101
J2502
RJ45