IBM Z50 - Manual (Page 45)

30 IBM WorkPad z50, Mobile Companion 30
Removing and Replacing Defective FRUs
This section provides information on removing and replacing
FRUs.
•
Do not damage any part. Only certified and trained
personnel should service the WorkPad z50 Mobile
Companion.
•
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.
•
When 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.
• When replacing a FRU, use the correct screw size as
shown in the procedures.
Safety Notice 1: Translation on page viii
Before the WorkPad z50 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
WorkPad z50. Verify this by shaking the WorkPad z50
and listening for rattling sounds. Metallic parts or metal
flakes can cause electrical shorts.
Safety Notice 2: Translation on page ix
The battery pack contains small amounts of harmful
substances. Do not disassemble it, throw it into fire or
water, or short-circuit it. Dispose of the battery pack or
backup battery as required by local ordinances or
regulations. Use only the battery in the appropriate parts
listing when replacing the battery pack. Use of an
incorrect battery can result in ignition or explosion of the
battery.
Safety Notice 6: Translation on page xi
Before removing any FRU, place the WorkPad z50 into
suspend mode, unplug all power cords from electrical
outlets, then disconnect any interconnecting cables and
remove the battery pack and backup batteries.
CAUTION:
If all power sources are removed from the WorkPad z50,
all data and applications will be lost. If the problem is
considered a software problem stored on DRAM
memory, approach the problem from that standpoint
before removing all power sources.
Attention: The mainboard is sensitive to, and can be
damaged by, electrostatic discharge.