Mcm Module (Processor) And Pass Through Modules - IBM pSeries 690 Service Manual

MCM Module (Processor) and Pass Through Modules

Attention: All components must be replaced to the location from which they were removed. Before
replacing MCMs, check with your support center to ensure you have been directed to replace the MCM(s)
by a valid error code in Chapter 5, "Error Code to FRU Index", on page 391.
Handling Static-Sensitive Modules
Attention: MCM and L3 modules are sensitive to static electricity discharge. These devices are shipped
in antistatic containers to prevent damage caused by electrostatic discharge.
Take the following precautions:
v Use an antistatic wrist strap while handling the device.
v Do not remove the device from the antistatic container until you are ready to install the device in the
system unit.
v With the device still in its antistatic container, touch it to a metal frame of the system.
v Grasp modules by the heatsink. Avoid touching the interposer buttons.
v If you need to lay the device down while it is out of the antistatic container:
– Lay the MCMs with the posts down on the antistatic mat.
– Lay the L3s with the LGA connector down in the antistatic tray.
Before picking it up again, touch the antistatic container and the metal frame of the system unit at the
same time.
v Handle the devices carefully in order to prevent permanent damage.
Attention: Before you remove or replace any MCM or L3 cache module, stop, read and understand this
entire procedure (MCM Module (Processor) and Pass Through Modules) and the procedure for "L3 Cache
Modules" on page 865. Also, check to ensure that the MCM/L3 Label Map is installed. Refer to "Installing
the MCM/L3/Passthrough Plug Map" on page 837.
Attention: The MCM modules in this system can be attached to the backplane a maximum of three
times. Check the MCM/L3 Label Map to confirm the number of times the target module has been
unplugged. If it has been unplugged three times, order a new module. If an MCM module is removed for a
fourth time, it must be replaced with a new MCM module. New MCMs are shipped with a new MCM/L3
plug count adhesive replacement label. When you install a new L3 cache module, place the new label in
the correct position on the MCM/L3 Label Map. If a new MCM/L3 Label Map is needed, see "Tools" on
page 1011 for replacement label part number.
Note: The MCM module and its associated VPD card are a single FRU, and must be replaced as a set.
See "VPD Card" on page 887 for VPD card removal and replacement procedure.
Attention: If the base configuration of the system has only one MCM, The pass through modules are
replaced with a filler cover that is attached only by the cam locks.
Chapter 9. Removal and Replacement Procedures
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