Radio Shack TRS-80 Hardware Manual page 15

Chapter
3
Powering
Up
and Powering
Down
To prevent information
loss,
always use
the proper
sequence
to
power up and pow*r down
your
syEtgrn. Refer
to
the
illustration
below,
as wet
I
as
to
the
procedures
that
tallow.
DrivG-Attiwt! Light
Write-Pmtect Smite
fi
PowtT Key
Figure
5.
Front
Yidw
of
r Primary H#tf
Dfsfr
fJnye
Power Kay
(primary
drive
only).
This key controls the power
to
all
the hard dish drives Turn
it
clockwise
to
turn
on the
drives
and
counterclockwise
to turn off
the drives.
To avoid
accidentally
erasing information
on
your hard
disks,
remove
the
key once
the drive? are
on.
Two power
keys are provided.
If
you
kjee
a
key, the
nearest
Radio
Shack Computer
Centet
caji
repiaue
it.
Powwr
Light
(on
all
secondary
drives
in
place
of
power
key).
When
the
light
Is
on, the drive
is
powered
up.
Drive-Active
Light,
When
the
light is
on, the drive
is
powered
up
and has been
selected
tor use.
When
Ihe
light is
blinking,
the
drive
is in
use,
Only one
drive-active
light should
be on
at
a
time.
If
moreihan
one
light is
on, turn
off
the system, wait a few minutes, and
turn M
on
again.
If
the
problem
r&curs,
contact a Radio Shack
service technician. (Note:
When
you use two
drives
in
rapid
succession,
more
than one
light
may
appear
to
be on
at
the
same
time, without
actually
being so)