Service manual

GS80 Component Removal and Replacement 6-15
Module Removal
1. If the system is not partitioned, shut down the operating system and issue the
SRM power off command. Put the OCP switch in the Off position. Skip step
2.
2. If the system is partitioned, from the console connected to the partition with
the target FRU, shut down the operating system and power it off using the
SRM power off command. Note, only hard partitions can be powered off. If
soft partitions are used, both partitions must be shut down and the hard
partition powered off.
3. If the FRU is in a single drawer or top drawer in a dual-drawer system, follow
the procedure in Section 6.1.1 to gain access to the FRU. Put the PSM
switch in the Service position. If the FRU is in the bottom drawer in a
dual-drawer system, follow the procedure in Section 6.1.2 to gain access to the
FRU.
4. Identify the target clock splitter (color code = green).
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.
6. Pull the module part way out of the drawer so that the coax cable connection
in the middle of the module is exposed. Pull the cable from its connector.
Pulling the module out too far can stress or damage the clock cable.
7. Remove the module.
Module Replacement
CAUTION: Damage may result if the levers are closed when the module is not
properly seated. Follow the procedure outlined in Section 6.2.
Reverse the steps outlined in the removal procedure.
Be sure to return the OCP switch to its original position.
Verification
Power on the system. Execute the SRM set sys_serial_num command.