IBM PS/1, Техническое обслуживание оборудования

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Removals and Replacements—Machine Type 2168
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.
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.
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.
Warning: The system board, adapters, memory SIMMs, video RAM
modules, and the math coprocessor can be damaged by electrostatic dis-
charge. 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.
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