IBM pSeries 670 Service Manual page 841

Attention: Each time an L3 cache module is removed from the system backplane, the LGA site
where the module connects must be cleaned. With the brush supplied with the replacement kit, use
only downward strokes, starting in the upper left corner. Move left to right, top to bottom, using
overlapping strokes as shown in the following illustration.
The brush must be discarded after cleaning four L3 sites.
11. Each time an L3 cache module is installed, inspect the interposer before installation. The associated
interposer must be inspected, using a magnifying glass. The interposer is not acceptable and the
module must be returned if the either of the following conditions occur:
Shorts
Missing buttons
12. Record on the system log sheet the date that this L3 cache module was removed.
. .
1 2 3 4 5
. .
1 2 3 4 5
If the button, a loop of the button wire, or an individual button wire
lead extends more than three times the width of the wire outside of a
connector hole chamfer (top side) or counter bore pin indent (bottom
side).
Chapter 9. Removal and Replacement Procedures
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