
[
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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