IBM ThinkPad 600X?, Руководство по оборудованию

Страница: 41 / 81

FRU REMOVALS AND REPLACEMENTS
FRU removals and replacements
This section presents information and drawing for use in
removing and replacing a FRU. Be sure to observe the
following general rules:
1. Do not try to service the computer unless you have
been trained and certified. An untrained person runs
the risk of damaging parts.
2. Before replacing any FRU, review “FRU replacement
notices” on page 34.
3. Begin by removing any FRUs that have to be
removed before the failing FRU. Any such FRUs are
listed at the top of the page. Remove them in the
orders in which they are listed.
4. Follow the correct sequence in the steps for removing
the FRU, as indicated in the drawings by the numbers
in square callouts.
5. When turning a screw to replace a FRU, turn it in the
direction indicated by the arrow in the drawing.
6. When removing the FRU, move it in the direction
indicated by the arrow in the drawing.
Ÿ
To replace a FRU, reverse the removal procedure
and follow any notes that pertain to replacement. For
internal information about connecting and arranging
internal cables, see “Locations” on page 64.
Ÿ
When replacing a FRU, use the correct screw as
shown in the procedures.
CAUTION:
Before removing any FRU, power off the computer,
unplug all power cords from electrical outlets, remove
the battery pack, and then disconnect any
interconnecting cables.
CAUTION:
The battery pack contains small amounts of nickel. Do
not disassemble it, throw it into fire or water, or
short-circuit it. Dispose of the battery pack as
required by local ordinances or regulations.
Attention: Before the computer is powered on after FRU
replacement, make sure all screws, springs, and other
small parts are in place and are not loose inside the
computer. Verify this by shaking the computer gently and
listening for rattling sounds. Metallic parts or metal flakes
can cause electrical short circuits.
Attention: The system board is sensitive to, and can be
damaged by, electrostatic discharge. Establish personal
grounding by touching a ground point with one hand before
touching these units.
You must use an electrostatic discharge (ESD) strap (P/N
6405959) must be used to establish personal grounding.
37