Appendix C: Field-Replaceable Units
7750 SR-a4 and SR-a8 Installation Guide 195
Required tools:
• #2 Phillips or flat blade torque driver
To replace a CPM-a:
Step 1. Remove the new CPM-a from the packaging. Do not touch the printed circuit board
or connector pins. Hold the CPM-a by the edges.
Step 2. Locate the appropriate CPM-a chassis slot.
Step 3. Align the card with the chassis slot guides (Key 1 on Figure 71) and the captive
screw with the threaded receptacle (Key 3 on Figure 71).
Step 4. Insert the CPM-a into the CPM-a slot. Press the CPM-a firmly into the slot. Make
sure that the connectors are fully seated in the chassis. The faceplate of the CPM-a
should be flush with the chassis.
Step 5. Tighten the captive screws (Key 2 on Figure 71) to secure the CPM-a. The
recommended torque is 4 to 5 lbf-in (0.45 to 0.56 N
.
m). Do not over-tighten.
Step 6. If the system is powered, check the Power LED on the CPM-a faceplate.
Step 7. Attach cables to the CPM-a ports.
Replacing the Internal Compact Flash Card on the CPM-a
The CF card is user-replaceable. It must be replaced by a supported CF card that has the
following files:
• bof.cfg – boot option file
• boot.ldr – bootstrap software
• config.cfg – default configuration file
• TiMOS-m.n.Yz
3 Threaded receptacle
Table 99: Replacing a CPM-a Features (Continued)
Key Description
Note:
• The internal compact flash (CF) card is on the CPM-a; see Figure 72. To replace the
compact flash card, you must first remove the CPM-a from the chassis.
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