Programming instructions

157
Upgrades and FRUs
Replacing a DSU FIM
Refer to “Safety Considerations” on page 98.
To replace a DSU FIM:
1. Power down the unit (see page 151).
2. Remove the front panels (see page 142).
3. Attach an anti-static strap to your wrist.
4. Remove adjoining DSU cards.
a. Pull out the 2 DSU cards next to the FIM being replaced in order to
access the FIM slot.
5. Remove the FIM.
a. Disconnect the internal optical fiber cables from the FIM faceplate.
Mark the cable connectors so they are replaced correctly on the
new FIM.
b. Remove the screws or release the latches on the FIM.
c. Pull the FIM out gently from slot 1 or 6, unplugging it from the
backplane.
6. Install a new FIM.
a. Slide the new FIM into the bottom slot 1 or 6, making sure it is firmly
connected to the backplane DIN connector.
b. Fasten the screws or release the latches on the FIM.
c. Remove the plastic caps from the cable connectors on the FIM
faceplate and connect the optical fiber cables to those connectors.
7. Replace the DSU cards.
8. Power up the unit (see page 151).
9. Replace the front panels (see page 142).