Radio Shack TRS-80 model III Owner's Manual page 21

OPERATION
Troubleshooting
and Maintenance
If
you have problems
operating
your
Model
III
Disk System,
please
check
the
following
symptoms
and cures,
and check
the
corresponding
table
in
your
Model
III
Manual.
If
you can't solve the problem, take the unit to
your
local
Radio
Shack. We'll
have
it
fixed
and
returned
to
you
as
soon
as possible.
Symptom
Cure
Disk drive
motors
run
continuously
when
the
Computer
is
turned on.
Check
external drive
connection sequence.
Drive 26-1
1
64 must always be
the
last
external
drive.
Computer
will
not load
trsdos.
1
Make
sure
you have
inserted the
trsdos
diskette
properly
in
Drive
0.
2.
Make
sure
ail
peripherals are properly
connected.
Error
Messages Look up
the
message
in
the
trsdos
or
basic Error
Message
Section.
The
"cure"
should be
listed.
Frequent
disk
i/o
errors
1
Diskette
is
partially
erased.
Backup
the
diskette,
then re-format
it.
2.
Diskette
is
worn
out.
Use backup
copy,
if
available, to
make
a
new
working
copy.
3.
Disk drives
need
cleaning or
alignment
by Radio
Shack
service technicians.
Maintenance
For
reliable
operation, the disk drives
must be kept clean
and
properly aligned.
These procedures should be
done by Radio Shack
service technicians,
according
to the
following schedule:
Degree
of
Use
Commercial
data processing
environment
Occasional
home
use
Maintenance
Interval
Every
month
for
medium
use.
Every 8-10
months;
more
often
if
needed.
For further instructions, see the
Troubleshooting
and Maintenance
section
in
your
Model
III
Manual.
13