Sharp MZ-80SFD Manual de usuario Pagina 13

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[
TROUBLE
SHOOTING
GUIDE
Start
of
disk system
Yes
Check repair procedure for power
~-----~
supply section.
(See pages 13 and
14.'
Yes
Trace
the
cause from
the
contents
of
error
message. (See page 12.'
No
End
Check by replacing several sheets
of
diskette
to
see if errors occur due
to
faulty diskette (data deterioration
caused by foreign matters, deformation, wear-out, damage, magnetism, etc.).
Troubles
in
disk system often cause error messages. Trace the cause from the contents of error message.
Replace suspected parts
in
the disk system with normal ones. Check again the trouble section.
1)
Personal computer
2)
Interface unit or expansion port
3)
I/O card
4) Diskette
5)
Signal cable
6) Disk drive
The signal circuits of floppy disk and I/O card operate at TTL levels of
OV,
+5V. Connect any system other than
micro-computer
peripheral devices for MZ-80 series
to
see
if
signal levels are
out
of the range of 0
to
+5V (max.
+5.25V).
The disk drive needs a
RAM
area
of
more 36K bytes.
If
the
RAM
area
of
your machine
is
less than 36K bytes,
it must be expanded.
-11-
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