Service manual

GS160/320 Component Removal and Replacement 4-35
4. Remove the EMI cover off either the H-switch or distribution board housing
that is adjacent to the QBB you are working on.
5. Using both hands, one on each module lever, place your index finger on the
catch and thumb on the edge of the lever just below/above the arrow. First
squeeze to release the lever and then pull both levers away from the module
to release it from the QBB backplane. See Figure 4–11.
6. If you are removing a global port connected to a front QBB (odd numbered),
pull the module part way out exposing the cable connectors. Do the
following to remove both cables:
1. Insert the blade end of a flathead screwdriver between the plastic cable
guide and the lip of the connector then twist one end of the cable loose.
Repeat this procedure on the other side of the cable and fully disconnect.
See Figure 4–11.
2. Pass the cables through the opening between the module and its handle.
3. Pull the module from the system box.
7. If you are removing a global port connected to a rear QBB (even numbered),
pull the module out of the system. Its cables are still attached so you’ll not
be able to take it from the back of the system. To remove both cables:
1. Insert the blade end of a flathead screwdriver between the plastic cable
guide and the lip of the connector then twist one end of the cable loose.
Repeat this procedure on the other end of the cable and fully disconnect.
See Figure 4–11.
2. The module is now free of the system box.
Module Replacement
Reverse the steps outlined in the removal procedure. When placing the module
into the system box, refer to Figure 4–6.
CAUTION: Damage may result if the levers are closed when the module is not
properly seated. Follow the procedure outlined in Section 4.5.1.
Verification
Power up the system and check that the SCM displays the global port links to
the H-switch/distribution board. Execute the SRM setsys_serial_num
command.