Appendix b. customer replaceable units (crus), Appendix, Customer – Lenovo 3000 V200 User Manual
Page 51: Replaceable, Units, Crus), 41of
Appendix
B.
Customer
Replaceable
Units
(CRUs)
Customer
Replaceable
Units
(CRUs)
are
computer
parts
that
can
be
upgraded
or
replaced
by
the
customer.
There
are
two
types
of
CRUs:
internal
and
external.
External
CRUs
are
easy
to
install,
whereas
internal
CRUs
require
some
technical
skills
and
in
some
cases
might
require
tools
such
as
a
screwdriver.
However,
both
internal
and
external
CRUs
are
safe
for
removal
by
the
customer.
Customers
are
responsible
for
replacing
all
external
CRUs.
Internal
CRUs
can
be
removed
and
installed
by
customers
or
by
a
Lenovo
service
technician
during
the
warranty
period.
Your
computer
contains
the
following
types
of
external
CRUs:
v
External
CRUs
(pluggable):
These
CRUs
unplug
from
the
computer.
Examples
of
these
types
of
CRUs
include
the
ac
adapter
and
power
cord.
v
External
CRUs
with
latches:
These
CRUs
include
a
latch
to
help
you
remove
and
replace
the
part.
Examples
of
these
types
of
CRUs
include
the
notebook
main
battery,
an
optical
drive,
a
hard-disk
drive,
and
an
extended
battery.
Your
computer
contains
the
following
types
of
internal
CRUs:
v
Internal
CRUs
(located
behind
an
access
panel):
These
CRUs
are
isolated
parts
within
the
computer
that
are
concealed
by
an
access
panel
that
is
typically
secured
by
either
one
or
two
screws.
Once
the
access
panel
is
removed,
only
the
specific
CRU
is
visible.
Examples
of
these
types
of
CRUs
include
memory
modules
and
hard
disk
drives.
v
Internal
CRUs
(located
within
the
product):
These
CRUs
are
accessible
only
by
opening
the
computer’s
outer
case.
Examples
of
these
CRUs
include
PCI
Express
Mini
Cards
and
the
integrated
keyboard.
Online
provides
instructions
for
replacing
internal
and
external
CRUs.
To
open
click
Start
,
move
the
pointer
to
All
Programs
;
then
to
Lenovo
Care
.
Click
Access
Help
.
Additionally,
the
Service
and
Troubleshooting
Guide
(this
guide)
and
provide
instructions
for
several
critical
CRU’s.
If
you
are
unable
to
access
these
instructions
or
if
you
have
difficulty
replacing
a
CRU,
you
can
use
either
of
the
following
additional
resources:
©
Copyright
Lenovo
2007
41