Service manual

GS160/320 Component Removal and Replacement 4-31
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. Put the PSM(s)’ switch in the Service
position. Note, only hard partitions can be powered off. If soft partitions
are used, they must be shut down and the hard partition must be powered
off from the console controlling the partition.
3. Access the particular QBB. See Section 4.5, Figure 4–5.
4. Identify the target clock splitter. See Section 4.4.
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 4–9.
6. Pull the module part way out of the system box to access and then pull the
coax cable from its connector in the center of the module. Pulling the
module out too far can stress the clock cable.
7. Remove the module.
Module Replacement
Reverse the steps outlined in the removal procedure. When placing the module
into the system box, refer to Section 4.5.1.
CAUTION: Damage may result if the levers are closed when the module is not
properly seated.
Be sure to return the OCP switch to its original position.
Verification
Power on the QBB.