•
Chapter
6
Removal
and
Replacement
6.1
Introduction
This
chapter
describes the procedures for removal
and
installation of assemblies during repair of the
Portable
PLUS Computer. Use these procedures
to
access assemblies
and
components you must test or
replace.
• Disconnecting the battery (section 6.2)
• Removing the
battery
(section 6.3).
•
Separating
the
case (section 6.4).
• Replacing the PCAs (section 6.5).
• Removing
the
keyboard module (section 6.6).
• Removing a keyswitch (section 6.7).
• Removing the display
module
(section 6.8).
• Removing the clutches
and
display cable (section 6.9).
• Removing ICs (section 6.10).
• Replacing plug-in drawer PCAs (section 6.11).
Installation procedures are the reverse of removal procedures.
Special "reassembly
notes'
provide additional information for proper installation
of
a
part
or assembly.
Recommended tools for removal
and
replacement
of
assemblies
and
components are listed in table
1-3.
CAUTION
Be
sure to wear a
grounded
wrist strap
and
that
your workbench is electrostatically protected.
Many
components (especially
the
display module) are susceptible to damage
by
electrostatic
discharge.
6.2
Disconnecting
the
Battery
WARNING
A fully charged
battery
has
an
enormous
short-circuit current capacity.
Be
careful
not
to
short
its
terminals. A short-circuit can cause sparks
and
melt metal, leading to
burns
or other injuries.
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