IBM pSeries 670, Service Manual

Page: 820 / 1032

Removal
Attention: If more than one module is to be replaced or reseated, begin with the upperpmost module,
replace it and then go to module(s) in the next lower position, until the lowermost module has been
replaced or reseated. Before any MCM, pass through module, or cover is removed, perform a general
cleaning operation, as described in step 3 of the following procedure.
1. Turn off the power as described in “Powering Off and Powering On the System” on page 779.
2. Remove the fan chassis. See “Fan Chassis” on page 849.
3. Perform a general cleaning operation, using a sash brush, ( not the one included with the FRU kit)
and vacuum cleaner (see “Tools” on page 962 for the tool part numbers), to remove any accumulated
dust and debris that has settled in the processor subsystem. Hold the vacuum hose near the brush to
remove any debris that the brush generates.
4. Note the location of the module being removed on the MCM/L3 Label Map on the system to confirm
the number of times the target module has been unplugged. If it has been unplugged three times,
order a new module.
Attention: Each MCM must be returned to the location from which it was removed.
Note: If this is the first removal/reseat for the module, record the serial number of the module and
the date of the action.
5. Determine the type of MCM modules used on your system. The following illustration shows the
difference between the aluminum heatsink and copper heatsink MCMs.
1 MCM (with aluminum heatsink)
2 MCM Alignment Hole (on copper heatsink MCMs only)
3 MCM (with copper heatsink)
6. If the MCM modules that you are removing have an aluminum heatsink and a plastic stiffener
attached to the backplane, go to substep 10 on page 801.
7. If the MCM modules that you are removing have a copper heatsink and an aluminum stiffener
attached to the backplane, do the following:
Note: Remove each MCM processor from the processor drawer, one at a time, until all MCM
processors that you planned to remove have been removed.
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Eserver
pSeries 670 Service Guide