5.4
Read
Error
Most read errors are soft errors. Data can be recovered by
following
the
recovery procedure mentioned in
5.2.
5.5 Seek Error
(1) Stepper
motor
or
stepper
motor
drive circuit
is
faulty.
(2) Faulty carriage
There are
two
ways
of
seek error recovery. One
is
to
recalibrate
to
track
00
, and seek back
to
the
original track. The
other
is
to
read
the
ID
field, check
the
track
number
on
which
the
head
is
located,
and move
the
head away from it. And read
it
again.
5.6 Interchangeability Error
Data
which
is
written
by one drive may
not
be read by another. This
error
is
called a Interchange-ability
error,which can be caused mostly by
the
following
reason, which should be checked
as
follows.
(1) Head misalignment: Refer
to
Adjustments and Confirmation Item 9.6
(2) Head
output
too
low:
Refer
to
Adjustments and Confirmation Item 9.3
(3)
Motor
speed difference: Refer
to
Adjustments and Confirmation Item
9.1
(4)
Format difference
6. TROUBLE ANALYSIS
FDD
trouble
may occur in any
of
the
following
nine forms.
(1) Index detection
failure
(2)
Not
ready
(3) Track 0 undetectable
(4) No seek
(5)
Nowrite
(6) No read
(7)
Read
error
(8)
IN
USE
LED
won't
light.
(9)
Write
protect
undetectable
Check
with
the
troubleshooting
flowchart
in 6.2
CAUTION:
Be
sure
to
switch
power
off
before removing an
FDD
or
PCB
from
the
operating
system.
-3-
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