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7.
Precautions
in
Use
7-1.
Precautions
for
handling
(1)
The
polarizer
is
quite susceptible to scratches.
Handle
it
very
carefully.
Do
not
handle
it
with
metallic tweezers.
Do
not press
it
or rub
it.
(2)
Do
not
touch
the display face or
stain
it.
If
the surface
is
dirty,
wipe
it
off
lightly
with
a
cotton
swab
or a
piece
of
soft
cloth or
chamois which
is
soaked with
petroleum or
benzine.
Never
use
organic solvents including
acetone, toluene, ethanol,
and
isopropyl
alcohol: they
would
damage
the
surface.
(3)
Do
not
allow
saliva
or
water
to
remain
on
the surface
for long;
it
might cause
a
local
deformation
or
discoloration.
(4)
If
the
LCD
breaks
and
the
liquid crystal
comes
out,
never put
it
in
your mouth.
If
it
sticks to
the skin or
clothes,
wash
it
off
with soap immediately.
7-2,
Installation
(1)
The
ICs
mounted
on
the
PCB
are very susceptible
to
static electricity.
To
protect
them
from
static electricity
which
your
body and
clothing
collect,
connect your
body
to
ground
via
a
resistor
of
some
1
M
ohms
to
discharge
electricity.
Connect
the
resistor
close
to
your body
in
the
grounding
line
and
protect yourself
from
electric
shock
hazard.
(2)
Do
not
bend
or
twist
the
module
excessively
when
installing
it.
If
you
do. the
device
might break
or
the
circuits
might
fail.
(3)
Protect the
LCD,
particularly the surface
of the
polarizer,
with
a
transparent
plate
(such
as
an
acrylic
or
glass plate)
on
the cabinet.
7-3.
Storage
(1)
Avoid
high
temperature
and
high humidity.
The
temperature should
be
0-35°C
and humidity under
60%.
(2)
Store the
module
in
a
dark
place,
out of
direct
sunlight
and
fluorescent
light, etc.
(3)
Keep
the polarizer
away
from any
external
forces.
(4)
Store the
module
in
the
box
when
shipping
it.
7-4.
Operational precautions
(1)
The
ICs
will
break
down
if
the drive voltage
exceeds
the
limit.
Make
sure of
electrical specifications,
particularly
the
supply
voltage.
(2)
The
response of
the display
is
slow
when
the
ambient temperature
is
below
the
lower
limit,
and
the display
becomes
unusual
when
the
ambient temperature
is
above
the
upper
limit.
In
any
case,
it
does
not
mean
failure.
It
operates
properly
in
the
normal
operating temperature
range,
(3)
The
contrast
of
the liquid crystal varies
with the viewing
angle,
ambient
temperature,
and
drive
voltage.
Adjust
the
drive voltage
for
the
best
contrast
by
installing
an
external variable switch.
(4)
If
you
move
the
module
from
cold storage
into
a
room,
as
during a
test,
moisture
would condense on
the
module
and
it
might
fail.
(5)
In
order
to
prevent
IC
Latch-up
and
DC
voltage
on
the
LCD
panel,
turn
power
on by
following Figure
A-
12.
Note;
FRAME
frequency
=
70
Hz
A-ll
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