Lenovo ThinkPad 600E Hardware Maintance Manual - June 1999: ThinkPad 600, 600E - Page 72

FRU Removals and Replacements, An electrostatic discharge ESD strap P/N 6405959 - internal battery

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FRU Removals and Replacements FRU Removals and Replacements This section contains information about removals and replacements: Do not damage any part. Only certified and trained personnel should service the computer. The arrows in the "Removals and Replacements" section show the direction of movement to remove a FRU, or to turn a screw to release the FRU. The arrows are marked in numeric order, in square callouts, to show the correct sequence of removal. If other FRUs must be removed before the failing FRU is removed, they are listed at the top of the page. To replace a FRU, reverse the removal procedure and follow any notes that pertain to replacement. See "Locations" for internal cable connections and arrangement information. When replacing a FRU, use the correct screw as shown in the procedures. Reviews "FRU Replacement Notices" on page 19 before replacing any FRU. 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, or other small parts are in place and are not left loose inside the computer. Verify this by shaking the computer 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. An electrostatic discharge (ESD) strap (P/N 6405959) must be used to establish personal grounding. 66

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FRU Removals and Replacements
FRU Removals and Replacements
This section contains information about removals and
replacements:
±
Do not damage any part.
Only certified and trained
personnel should service the computer.
±
The arrows in the “Removals and Replacements”
section show the direction of movement to remove a
FRU, or to turn a screw to release the FRU.
The
arrows are marked in numeric order, in square
callouts, to show the correct sequence of removal.
±
If other FRUs must be removed before the failing
FRU is removed, they are listed at the top of the
page.
±
To replace a FRU, reverse the removal procedure
and follow any notes that pertain to replacement.
See “Locations” for internal cable connections and
arrangement information.
±
When replacing a FRU, use the correct screw as
shown in the procedures.
Reviews “FRU Replacement Notices” on page
19 before
replacing any FRU.
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, or other
small parts are in place and are not left loose inside
the computer.
Verify this by shaking the computer
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.
An electrostatic discharge (ESD) strap (P/N 6405959)
must be used to establish personal grounding.
66