Appendix B: Field-Replaceable Units
Page 138 7705 SAR-8 Installation Guide
Removing a CSM
Tools required:
• Phillips screwdriver
To remove a CSM:
Step 1. Disconnect all cable connections to the CSM.
Step 2. Use a Phillips screwdriver to loosen the captive screws that fasten the CSM to the
chassis.
Step 3. Simultaneously rotate the ejector levers outward to unseat the backplane connectors.
Step 4. Pull the CSM out of the slot using the ejector levers. Place the CSM on an anti-static
surface.
Step 5. If you are not replacing the CSM immediately, install a filler plate to cover the empty
slot. Refer to Installing a Filler Plate on page 148 for instructions.
Replacing a CSM
Figure 39 illustrates replacing a CSM.
Figure 39: Replacing a CSM
Note: Each CSM has two ejector levers that release the card from the backplane
connectors. During installation, the ejector levers must be rotated inward. The ejector levers
must remain in the inward position while the card is installed in the chassis.
CSM A
SLOT ID
MDA 1
MDA 3
MDA 5
CSM B
MDA 2
MDA 4
MDA 6
CSM
Stat
Pwr
Act
In
Sync
Out
Minor
Major
Critical
Batt B
Batt A
Fan
Alarm
External
Alarms
ACO/LT
FAN
7705 SAR-8
CSM
Stat
Pwr
Act
Console
In
Sync
Out
Mgmnt Port
19603
2
3
3
4
4
1