IBM iSeries 270 Service Manual page 120

13. Record on the log sheet on the system the date that this MCM has been removed.
To install MCM and pass-through modules:
Note: This procedure is to be performed only by trained service personnel.
1. Power off the system, and unplug the power cord.
2. If installing a new MCM module, insert the new actuation bolt supplied with the new MCM module,
and move it and the spring assembly to the up position. Hand tighten to hold the assembly in the up
position and perform a general cleaning operation, using a sash brush, part number 450732 (not the
one included with the FRU kit) and vacuum cleaner 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
the brush generates.
3. Follow the procedure described in the Attention note below to clean the LGA site using the brush
supplied with the new module.
Note: Before you remove the brush from its protective bag, loosen the bristles by pressing them on
the ESD mat until they are 90 degrees from the handle.
Attention: Each time an MCM module is installed on the system board, the LGA site where the
module connects with the system board must be cleaned. With the brush supplied with the
replacement kit, use only downward strokes, starting in the topmost location. Using firm pressure,
brush left to right using overlapping strokes. The brush must be discarded after cleaning only one
MCM site.
Figure 3. Cleaning procedure for the LGA site
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Hardware (Remove and Replace; Part Locations and Listings)