Repair and Replacement 11-7
Replacing Parts
Figure 11-1 Unlatching the Air Intake Grille
Replacing a Line Module
The configuration of the back card may be slightly different depending on whether it is a single card
or redundant card configuration. A standby card in a redundant card configuration may be removed
without disrupting system operation even if it is a BCC. Removing a single card, however, will cause
a system outage.
Caution Removing an active, single back card disrupts service on the node.
To remove a line module, perform the following steps:
Step 1 Check the status of the card using the dspcd or dspcds command. It should be failed or
standby or replacement will affect operation of the node.
Step 2 If an active card needs to be replaced, “down” it first with the dncd command. Removing
an active card affects operation only slightly if there is a standby card.
Step 3 Before removing a LM-BCC, make sure the standby BCC stby indicator is on steady. A
flashing stby indicator indicates it is in the process of downloading either configuration
data or software and is not ready to accept a transfer.
Step 4 For a single card configuration, disconnect the cables from the back card face plate. Make
a note of the location of each cable so that it can be replaced correctly.
Step 5 For a redundant card configuration, disconnect the appropriate leg of the Y-cable
connecting to the back card to be replaced. DO NOT REMOVE THE OTHER LEG
GOING TO THE BACKUP CARD.
Latch
Access
hole
Released
air intake
grill
H7997
Power
supply
