Sun Microsystems Datacenter Switch 3456 Installation Manual page 60

1. Set the DMM for ohms.
If the DMM is not autoranging, set it for the lowest resistance.
2. Touch the black probe of the DMM to the chassis ground.
See .
FIGURE 6-9
Verifying Electrical Continuity
FIGURE 6-9
3. Touch the red probe to each one of the line card power connectors on the left
side.
The resistance should be no greater than 50 ohm.
4. Move the black probe to a screw on the midplane stiffener.
See .
FIGURE 6-9
Step 3.
5. Repeat
6. Move the black probe to a bus bar screw that is floating in the bus bar.
See .
FIGURE 6-9
7. Repeat Step 3.
8. Move the black probe to a line card power connector on the left side.
See .
FIGURE 6-9
Step 3.
9. Repeat
10. If you read more than 50 ohm on any of these tests, investigate why.
Chapter 6 Installing the Chassis 45