Owner's Manual

-1-2-
ESD PRECAUTIONS
Electrostatically
Sensitive Devices
(ESD)
Some semiconductor
(solid state)
devices can be
damaged easily by
static
electricity.
Such
components
commonly
are called
Electrostatically
Sensitive Devices
(ESD). Examples
of
typical
ESD devices are
integrated
circuits and some field-effect transistors and semiconductor
chip components.
The
following techniques
should
be used to
help
reduce the incidence of
component damage
caused
by
static
electricity.
1.
Immediately
before
handling any
semiconductor
component
or
semiconductor-equipped assembly,
drain off
any
electrostatic
charge
on
your body by touching
a known earth
ground. Alternatively,
obtain and wear a
commercially
available
discharging
wrist
strap
device,
which should be removed for
potential
shock reasons
prior
to
applying power
to the unit under test.
2. After
removing
an electrical
assembly equipped
with ESD
devices,
place
the
assembly
on a conductive sur-
face such as aluminum
foil,
to
prevent
electrostatic
charge buildup
or
exposure
of the
assembly.
3. Use
only
a
grounded-tip soldering
iron to solder or unsolder ESD devices.
4. Use
only
an anti-static solder removal device. Some solder removal devices not classified as "anti-static" can
generate
electrical
charges
sufficient to
damage
ESD devices.
5. Do not use
freon-propelled
chemicals. These can
generate
electrical
charges
sufficient to
damage
ESD
devices.
6. Do not remove a
replacement
ESD device from its
protective package
until
immediately
before
you
are
ready
to install it.
(Most replacement
ESD devices are
packaged
with leads
electrically
shorted
together by
conductive
foam,
aluminum foil or
comparable
conductive
materials).
7.
Immediately
before
removing
the
protective
material from the leads of a
replacement
ESD
device,
touch the
protective
material to the chassis or circuit
assembly
into which the device will
by
installed.
CAUTION : BE SURE NO POWER IS APPLIED TO THE CHASSIS OR
CIRCUIT,
AND OBSERVE ALL
OTHER SAFETY PRECAUTIONS.
8. Minimize
bodily
motions when
handing unpackaged replacement
ESD devices.
(Otherwise
harmless motion
such as the
brushing together
of
your
clothes fabric or the
lifting
of
your
foot from a
carpeted
floor can
gen-
erate static
electricity
sufficient to
damage
an ESD
device).
[CAUTION.
GRAPHIC
SYMBOLS]
THE LIGHTNING FLASH WITH APROWHEAD SYMBOL. WITHIN AN
EQUILATERAL
TRIANGLE,
IS
INTENDED TO ALERT THE SERVICE PERSONNEL TO THE PRESENCE OF UNINSULATED
"DANGEROUS VOLTAGE" THAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK
OF ELECTRIC SHOCK.
THE EXCLAMATION POINT WITHIN AN
EQUILATERAL
TRIANGLE IS INTENDED TO ALERT THE
SERVICE PERSONNEL TO THE PRESENCE OF IMPORTANT SAFETY INFORMATION IN SERVICE
LITERATURE.
SECTION
1.
GENERAL