Removals and Replacements—Machine Type 2168
Note: The Machine Type 2168 might contain drives and devices not
illustrated in this book. Follow replacement instructions for the same size
device if in doubt. See Appendix, “Model/Monitor Configurations and FRU
Part Numbers” on page A-1 for exact model configurations.
The arrows in the removals and replacements procedures show the direction
of movement to remove a field-replaceable unit (FRU), to turn a screw, or to
press a tab to release the FRU.
Begin all removals by removing the cover (and rear cover, if applicable).
When other FRUs must be removed prior to removing the failing FRU, they
are listed at the top of the page. Go to the removal procedure for each FRU
listed, remove the FRU, and then continue with the removal of the failing
FRU.
To replace a FRU, reverse the removal procedure and follow any notes that
pertain to replacement. See “Parts/Test Point Locations” on page 5-1 for
internal cable connection and arrangement information.
Before disconnecting any cables, note their locations. Reinstall any new
FRUs with cables in the same locations.
CAUTION:
Before removing any FRU, power off the system unit, unplug all power
cords from electrical outlets, disconnect any interconnecting cables,
and disconnect any telephone cords.
The power supply might contain +5 V dc auxiliary power when the
system is powered off. Be sure to unplug the power cord before
attempting any replacements.
Warning: The system board, processors, adapter cards, SIMMs, video
memory modules, and upgrade processors can be damaged by electrostatic
discharge. Use an electrostatic discharge (ESD) strap to establish personal
grounding. If you don’t have an ESD strap, establish personal grounding by
touching a ground point with one hand before touching the static-sensitive
FRUs.
4-24
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