Service manual

GS160/320 Component Removal and Replacement 4-27
Module Removal
1. If the operating system supports hot-swap CPU, enter the appropriate OS
command to put the target CPU in the hot-swap state. See Section 4.3.1.
Skip steps 2 and 3.
2. 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 3.
3. 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.
4. Access the target QBB. See Section 4.5, Figure 4–5. Identify the target
CPU – its yellow Hot Swap OK LED should be lit.
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 4–7.
6. Remove the module.
Module Replacement
Reverse the steps outlined in the removal procedure. When placing the module
into the system box, refer to Figure 4–7.
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.
(Note that the PSM will automatically run XSROM test 5d on the new CPU.)
Be sure to return the OCP switch to its original position.
Verification
Power on the CPU and see that it joins the operating system resources. Execute
the SRM set sys_serial_num command.