v
Do
not
touch
the
reflective
surface
of
a
dental
mirror
to
a
live
electrical
circuit.
The
surface
is
conductive
and
can
cause
personal
injury
or
equipment
damage
if
it
touches
a
live
electrical
circuit.
v
Some
rubber
floor
mats
contain
small
conductive
fibers
to
decrease
electrostatic
discharge.
Do
not
use
this
type
of
mat
to
protect
yourself
from
electrical
shock.
v
Do
not
work
alone
under
hazardous
conditions
or
near
equipment
that
has
hazardous
voltages.
v
Locate
the
emergency
power-off
(EPO)
switch,
disconnecting
switch,
or
electrical
outlet
so
that
you
can
turn
off
the
power
quickly
in
the
event
of
an
electrical
accident.
v
Disconnect
all
power
before
you
perform
a
mechanical
inspection,
work
near
power
supplies,
or
remove
or
install
main
units.
v
Before
you
work
on
the
equipment,
disconnect
the
power
cord.
If
you
cannot
disconnect
the
power
cord,
have
the
customer
power-off
the
wall
box
that
supplies
power
to
the
equipment
and
lock
the
wall
box
in
the
off
position.
v
Never
assume
that
power
has
been
disconnected
from
a
circuit.
Check
it
to
make
sure
that
it
has
been
disconnected.
v
If
you
have
to
work
on
equipment
that
has
exposed
electrical
circuits,
observe
the
following
precautions:
–
Make
sure
that
another
person
who
is
familiar
with
the
power-off
controls
is
near
you
and
is
available
to
turn
off
the
power
if
necessary.
–
When
you
are
working
with
powered-on
electrical
equipment,
use
only
one
hand.
Keep
the
other
hand
in
your
or
behind
your
back
to
avoid
creating
a
complete
circuit
that
could
cause
an
electrical
shock.
–
When
using
a
tester,
set
the
controls
correctly
and
use
the
approved
probe
leads
and
accessories
for
that
tester.
–
Stand
on
a
suitable
rubber
mat
to
insulate
you
from
grounds
such
as
metal
floor
strips
and
equipment
frames.
v
Use
extreme
care
when
measuring
high
voltages.
v
To
ensure
proper
grounding
of
components
such
as
power
supplies,
pumps,
blowers,
fans,
and
motor
generators,
do
not
service
these
components
outside
of
their
normal
operating
locations.
v
If
an
electrical
accident
occurs,
use
caution,
turn
off
the
power,
and
send
another
person
to
get
medical
aid.
Safety
statements
Important:
Each
caution
and
danger
statement
in
this
documentation
begins
with
a
number.
This
number
is
used
to
cross
reference
an
English-language
caution
or
danger
statement
with
translated
versions
of
the
caution
or
danger
statement
in
the
Safety
Information
document.
For
example,
if
a
caution
statement
begins
with
a
number
1,
translations
for
that
caution
statement
appear
in
the
Safety
Information
document
under
statement
1.
Be
sure
to
read
all
caution
and
danger
statements
in
this
documentation
before
performing
the
instructions.
Read
any
additional
safety
information
that
comes
with
your
server
or
optional
device
before
you
install
the
device.
Safety
ix
Summary of Contents for 8853L6U
Page 1: ...BladeCenter HS21 Types 1885 and 8853 Problem Determination and Service Guide...
Page 2: ......
Page 3: ...BladeCenter HS21 Types 1885 and 8853 Problem Determination and Service Guide...
Page 8: ...vi BladeCenter HS21 Types 1885 and 8853 Problem Determination and Service Guide...
Page 16: ...xiv BladeCenter HS21 Types 1885 and 8853 Problem Determination and Service Guide...
Page 30: ...14 BladeCenter HS21 Types 1885 and 8853 Problem Determination and Service Guide...
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Page 146: ...Part Number 49Y0053 Printed in USA 1P P N 49Y0053...
