Lenovo ThinkCentre A57e C&L 2 Nordics - English,Danish,Finnish,Norwegi - Page 29

Cleaning, maintenance, Using, headphones, earphones

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Cleaning and maintenance Keep your computer and workspace clean. Shut down the computer and then disconnect the power cord before cleaning the computer. Do not spray any liquid detergent directly on the computer or use any detergent containing flammable material to clean the computer. Spray the detergent on a soft cloth and then wipe the computer surfaces. Using headphones or earphones If your computer has both a headphone connector and an audio-out connector, always use the headphone connector for headphones (also called a headset) or earphones. CAUTION: Excessive sound pressure from earphones and headphones can cause hearing loss. Adjustment of the volume control as well as the equalizer to other settings than the center position may increase the earphones and headphones output voltage and therefore the sound pressure level. Excessive use of headphones or earphones for a long period of time at high volume can be dangerous if the output of the headphone or earphone connectors do not comply with specifications of EN 50332-2. The headphone output connector of your computer complies with EN 50332-2 Sub clause 7. This specification limits the computer's maximum wide band true RMS output voltage to 150 mV. To help protect against hearing loss, ensure that the headphones or earphones you use also comply with EN 50332-2 (Clause 7 Limits) for a wide band characteristic voltage of 75 mV. Using headphones that do not comply with EN 50332-2 can be dangerous due to excessive sound pressure levels. The use of factors influencing the earphones and headphones output other than those specified by Lenovo (e.g. operating system, equalizer software, firmware, and driver) may increase the earphones and headphones output voltage and therefore the sound pressure level. If your Lenovo computer came with headphones or earphones in the package, as a set, the combination of the headphones or earphones and the computer already complies with the specifications of EN 50332-1. The use of earphones and headphones other than those specified by Lenovo may lead to heightened sound pressure level. If different headphones or earphones are used, ensure that they comply with EN 50332-1 (Clause 6.5 Limitation Values). Using headphones that do not comply with EN 50332-1 can be dangerous due to excessive sound pressure levels. Chapter 1. Important safety information 25

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Cleaning
and
maintenance
Keep
your
computer
and
workspace
clean.
Shut
down
the
computer
and
then
disconnect
the
power
cord
before
cleaning
the
computer.
Do
not
spray
any
liquid
detergent
directly
on
the
computer
or
use
any
detergent
containing
flammable
material
to
clean
the
computer.
Spray
the
detergent
on
a
soft
cloth
and
then
wipe
the
computer
surfaces.
Using
headphones
or
earphones
If
your
computer
has
both
a
headphone
connector
and
an
audio-out
connector,
always
use
the
headphone
connector
for
headphones
(also
called
a
headset)
or
earphones.
CAUTION:
Excessive
sound
pressure
from
earphones
and
headphones
can
cause
hearing
loss.
Adjustment
of
the
volume
control
as
well
as
the
equalizer
to
other
settings
than
the
center
position
may
increase
the
earphones
and
headphones
output
voltage
and
therefore
the
sound
pressure
level.
Excessive
use
of
headphones
or
earphones
for
a
long
period
of
time
at
high
volume
can
be
dangerous
if
the
output
of
the
headphone
or
earphone
connectors
do
not
comply
with
specifications
of
EN
50332-2.
The
headphone
output
connector
of
your
computer
complies
with
EN
50332-2
Sub
clause
7.
This
specification
limits
the
computer’s
maximum
wide
band
true
RMS
output
voltage
to
150
mV.
To
help
protect
against
hearing
loss,
ensure
that
the
headphones
or
earphones
you
use
also
comply
with
EN
50332-2
(Clause
7
Limits)
for
a
wide
band
characteristic
voltage
of
75
mV.
Using
headphones
that
do
not
comply
with
EN
50332-2
can
be
dangerous
due
to
excessive
sound
pressure
levels.
The
use
of
factors
influencing
the
earphones
and
headphones
output
other
than
those
specified
by
Lenovo
(e.g.
operating
system,
equalizer
software,
firmware,
and
driver)
may
increase
the
earphones
and
headphones
output
voltage
and
therefore
the
sound
pressure
level.
If
your
Lenovo
computer
came
with
headphones
or
earphones
in
the
package,
as
a
set,
the
combination
of
the
headphones
or
earphones
and
the
computer
already
complies
with
the
specifications
of
EN
50332-1.
The
use
of
earphones
and
headphones
other
than
those
specified
by
Lenovo
may
lead
to
heightened
sound
pressure
level.
If
different
headphones
or
earphones
are
used,
ensure
that
they
comply
with
EN
50332-1
(Clause
6.5
Limitation
Values).
Using
headphones
that
do
not
comply
with
EN
50332-1
can
be
dangerous
due
to
excessive
sound
pressure
levels.
Chapter
1.
Important
safety
information
2
5