Apple Macintosh - Page 298

302 Macintosh User's Handbook
The Mac Keyboard
If the keyboard on the Mac malfunctions, there is little the
operator can do but contact an authorized dealer. There are,
however, some precautions which
can prolong the life of the
keyboard. First
we would reiterate that you should never eat or
drink around any computer equipment. The keyboard is espe-
cially susceptible
to damage from spilled food or drink. Any
matter which falls between the keys can become lodged there
hindering the keystroke action. Any liquids which fall
on the
keyboard will seep in and
can cause electrical malfunctions.
The second precaution is to try to use the softest possible
key touch.
The keys are quite sensitive and require very little
pressure to sense each keystroke. The keys operate by making
an electrical contact each time a key is pressed. Striking a key
too hard may cause the electrical contacts to age prematurely.
On the whole, however, the keyboard is durable and very
reliable.
Taking Care of the Mouse
The Macintosh mouse should be cleaned at regular inter-
vals
to avoid damage to the internal moving parts. First
remove
and clean the mouse ball and its retaining ring as
shown in figure 9.2. Then blow
out any debris lodged in the ball
cavity. Use cleaning fluids
on the mouse sparingly. To clean the
rollers
on the inside of the mechanism, use a cotton swab
slightly moistened with
alcohol or cleaning fluid. Never use
water
to clean the mouse as this may damage the internal
circuitry. Reassemble the mouse after it
is clean.