Data General AViiON 530 Series, Customer Documentation

Page: 177 / 266

Replacing the System Board
10-7
014–002091
3. Gently push on onesideand then theother sideto seat thePROM component in
thesocket.
4. Verify that the CPU configuration jumpers are correct for your system.
Figure 10Ć10 shows the location of these jumpers, and valid configurations. If
necessary, move the jumpers on your replacement system board to reflect the
correct number of processors and cache/memory modules in your system.
CPU Configuration jumpers
System board
Single CPU, Two CMMUs
Indicates jumper installed Indicates jumper removed
CPU complex connector
Dual CPUs, Four CMMUs
CPU Configuration jumpers
System board
Single CPU, Two CMMUs
Dual CPUs,
Twelve
CMMUs
Indicates jumper
installed
Indicates jumper
removed
CPU complex connector
Dual CPUs,
Four
CMMUs
Single CPU, Six CMMUs
Figure 10-10 Specifying the CPU Configuration on the System Board
NOTE: Incorrectly configured system and CPU complex boards will cause your
system to fail powerup.
Two CPU complex boards within a single computer unit must both
contain either two CMMUs or six; AV530 and 4600 series systems do not
support combinations of 2- and 6-CMMU CPU complex boards.