PRELIMINARY SERVICE CHECKS (Continued)
PREVENTATIVE MAINTENANCE
ENVIRONMENT
Computers
perform best in a clean, cool area
that
is
below
80
degrees Fahrenheit and free
of
dust
and smoke particles. Even
though
home
Computers
are not affected by
cigarette
smoke as
much
as
commercial
Computers
are affected,
it
is
belter
to
maintain
a smoke-free area around the Computer. Do
not
block
cabinet vents
of
any
of
the
Computer
system; Computer,
Monitor,
Printer,
or
other
power
devices.
ELECTRICAL POWER
Variations in the line voltage can
affect
the Computer. Try
to
avoid these
fluctuations
by
using
an
AC receptacle that is on a
power
line
not
used by appliances
or
other
heavy
current
demand devices. A power-surge protector, power-line
conditioner,
or
non-interruptable
power
supply
may be needed
to
cure the problem. Do
not
switch
power
On
and
Off
frequently.
KEYBOARD
liquids
spilled
into
the Keyboard can ruin it.
Immediately
after
a
spill
occurs,
disconnect
the
Computer
power plug from
AC
power
outlet.
Then,
if
circuitry
or
contacts
are
contaminated,
disassemble
the Keyboard and
carefully
rinse the Keyboard
printed
circuit
board
with
distilled
water and let it dry. Use a
colton
swab
to
clean between the keys. Use a non-abrasive con-
tact
cleaner and lint-free wipers on accessible
connectors
and
contacts.
DISK DRIVES
Clean the read/write heads
of
the Disk Drives about
once
a
month
or
after
100
hours
usage. Use
only
an approved head clean-
ing kit.
Handle
carefully
to
preserve proper
disk
head alignment. A sudden bump
or
jolt
to
the
Disk
Drives can
knock
the
disk
head
out
of
alignment.
If the
disk
drive
must
be transported, place an
old
disk
in
slot
and
close
door
during
transport.
Store
disks
in
their
protective
covers and never
touch
the
disk
surface. Observe the
disk
handling precautions
usually
found
on the back of
disk
protective
covers.
PRINTERS
Carefully vacuum the Printer regUlarly. Wipe surface areas clean using a
light
all-purpose cleaner. Do
not
oil the machine.
The oil
will
collect
abrasive
grit
and
dust.
The
dust
will
act
as a blanket.
This
can cause
components
to
overheat and fail.
STATIC ELECTRICITY
Static
electricity
discharge
can
affect
the Computer. In order
to
minimize
the
possibility,
use
anti-static
mats, sprays,
tools
and materials, and maintain good
humidity
in the
Computer
environment.
MONITOR
Use an
isolation
transformer
with
any
Monitor
that
does
not
come
as part
of
the system
since
some
Monitors
use a HOT
chassis
(chassis
connected
to
one side
of
the AC line). The face
of
the
Monitor
should
never be
left
on
for
long
periods
of
time
at
high
brightness
level except when pattern is being changed periodically. Use
caution
when cleaning anti-glare screens,
to
preserve the glare-reduction feature.
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IX
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