Sharp EL733A EL-733A Operation Manual - Page 81

Appendix, Maintenance

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Appendix A. Care And Maintenance I I pti Since the liquid crystal display is made of glass material, If treat the calculator with care. To insure trouble-free operation of your SHARP calculator, we recommend the following: 1. The calculator should be kept in areas free from extreme temperature changes, moisture and dust. During warm weather, vehicles left in direct sunlight are subject to high temperature build-up. Prolonged exposure to high temperature may damage your calculator. 2. A soft, dry cloth should be used to clean the calculator. Do not use solvents or a wet cloth. 3. If the calculator will not be used for an extended period of time, remove the batteries to avoid possible damage caused by battery leakage. 4. If service of your calculator is required, use only an authorized SHARP SERVICE CENTER listed on the last page of this manual. 5. Keep this manual for reference. How To Proceed If Abnormal Conditions Occur If this calculator is exposed to a powerful external electric field or shock during use, a rare condition may occur in which all the keys, including the ccI key, do not function. In this case, press the RESET switch on the back of the calculator. Note that the memory contents will be completely cleared when this operation is performed. Press the RESET switch only in the following cases: • After replacing the batteries • To clear all memory contents is 160 • When an abnormal condition occurs and all keys are inoperative. Battery Replacement Batteries Used Alkaline-manganese battery (LR44) x 2 Notes on Battery Replacement Batteries that are not properly handled can leak and damage the calculator. For this reason, pay particular attention to the following points. • Be sure to turn the power off when replacing batteries. • Replace both batteries at the same time. • Do not mix new and used batteries. • Use the same type of batteries. • When installing, orient each battery properly according to the + markings as indicated in the calculator. • Keep the batteries out of the reach of children. • Since the original batteries were factory-installed before shipment, they may require replacement before the continuous operating time indicated in the specifications is reached. • Exhausted batteries left in the calculator may leak and damage the calculator. • Do not throw the batteries into a fire, as they may explode. When to Replace Batteries When the battery indicator is out, replace the batteries. Immediately change them by following the procedure below. Replacement Procedure 1. Turn the power off by pressing the oFFJ key. 2. Remove the two screws on the back and remove the back cover. 161

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I
I
pti
If
is
Appendix
A.
Care
And
Maintenance
Since
the
liquid
crystal
display
is
made
of
glass
material,
treat
the
calculator
with
care.
To
insure
trouble
-free
operation
of
your
SHARP
calculator,
we
recommend
the
following:
1.
The
calculator
should
be
kept
in
areas
free
from
extreme
temperature
changes,
moisture
and
dust.
During
warm
weather,
vehicles
left
in
direct
sunlight
are
subject
to
high
temperature
build-up.
Prolonged
exposure
to
high
temperature
may
damage
your
calculator.
2.
A
soft,
dry
cloth
should
be
used
to
clean
the
calculator.
Do
not
use
solvents
or
a
wet
cloth.
3.
If
the
calculator
will
not
be
used
for
an
extended
period
of
time,
remove
the
batteries
to
avoid
possible
damage
caused
by
battery
leakage.
4.
If
service
of
your
calculator
is
required,
use
only
an
authorized
SHARP
SERVICE
CENTER
li
sted
on
the
last
page
of
this
manual.
5.
Keep
this
manual
for
reference.
How
To
Proceed
If
Abnormal
Conditions
Occur
If
this
calculator
is
exposed
to
a
powerful
external
electric
field
or
shock
during
use,
a
rare
condition
may
occur
in
which
all
the
keys,
including
the
cc
I
key,
do
not
function.
In
this
case,
press
the
RESET
switch
on
the
back
of
the
calculator.
Note
that
the
memory
contents
will
be
completely
cleared
when
this
operation
is
performed.
Press
the
RESET
switch
only
in
the
following
cases:
•
After
replacing
the
batteries
•
To
clear
all
memory
contents
160
•
When
an
abnormal
condition
occurs
and
all
keys
are
inoperative.
Battery
Replacement
Batteries
Used
Alkaline
-manganese
battery
(LR44)
x
2
Notes
on
Battery
Replacement
Batteries
that
are
not
properly
handled
can
leak
and
damage
the
calculator.
For
this
reason,
pay
particular
attention
to
the
following
points.
•
Be
sure
to
turn
the
power
off
when
replacing
batteries.
•
Replace
both
batteries
at
the
same
time.
•
Do
not
mix
new
and
used
batteries.
•
Use
the
same
type
of
batteries.
•
When
installing,
orient
each
battery
properly
according
to
the
+
markings
as
indicated
in
the
calculator.
•
Keep
the
batteries
out
of
the
reach
of
children.
•
Since
the
original
batteries
were
factory
-installed
before
shipment,
they
may
require
replacement
before
the
continuous
operating
time
indicated
in
the
specifications
is
reached.
•
Exhausted
batteries
left
in
the
calculator
may
leak
and
damage
the
calculator.
•
Do
not
throw
the
batteries
into
a
fire,
as
they
may
explode.
When
to
Replace
Batteries
When
the
battery
indicator
is
out,
replace
the
batteries.
Immediately
change
them
by
following
the
procedure
below.
Replacement
Procedure
1.
Turn
the
power
off
by
pressing
the
oFFJ
key.
2.
Remove
the
two
screws
on
the
back
and
remove
the
back
cover.
161