IBM QS21 Service Guide - Page 11

Safety, Information - performance

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v Use only approved tools and test equipment. Some hand tools have handles that are covered with a soft material that does not provide insulation from live electrical current. v Regularly inspect and maintain your electrical hand tools for safe operational condition. Do not use worn or broken tools or testers. 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 pocket 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. Important: All caution and danger statements in this documentation begin with a number. This number is used to cross reference an English caution or danger statement with translated versions of the caution or danger statement in the IBM Safety Information book. For example, if a caution statement begins with a number 1, translations for that caution statement appear in the IBM Safety Information book under statement 1. Safety ix

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v
Use
only
approved
tools
and
test
equipment.
Some
hand
tools
have
handles
that
are
covered
with
a
soft
material
that
does
not
provide
insulation
from
live
electrical
current.
v
Regularly
inspect
and
maintain
your
electrical
hand
tools
for
safe
operational
condition.
Do
not
use
worn
or
broken
tools
or
testers.
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
pocket
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.
Important:
All
caution
and
danger
statements
in
this
documentation
begin
with
a
number.
This
number
is
used
to
cross
reference
an
English
caution
or
danger
statement
with
translated
versions
of
the
caution
or
danger
statement
in
the
IBM
Safety
Information
book.
For
example,
if
a
caution
statement
begins
with
a
number
1,
translations
for
that
caution
statement
appear
in
the
IBM
Safety
Information
book
under
statement
1.
Safety
ix