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FDD412A/B
; WRITE ERROR
| C
>)
[ wRITE GATE-N
:
(1C24-5) |
STEP-N
:
(TP-8)
|
HEAD ENGAGE-N
:
(I1C16-17)
ee
LOW CURRENT-N
2
(1C27-1)
Protect
sensor
output:
(C10-1)
Medium
correctly_
NO
Set
medium
set
on FDD?
correctly. .
YES
Medium
writable
(i.e.
not write>
protected)?
NO
YES
;
Can~data
be
YES
:
written
to
medium?
Put
write
enable
label
on
medium
for writing.
Power
supply
NO
Syoieeecs
normal?
|
+5V:
(J2-3)
}\—_
Use
another
medium
that
is
writable.
ES 420y< (3251)
Hoe Ove
aie. es
<Weltage damaged™>-
circuit?
7
WRITE
GATE
cae
~
timing
correct
iter HEAD ENGAGE
and
STEP
signal
input?
YES
NO
NO
Apply
correct
voltages.
Repair
damaged
circuit.
\
LOW ~ CURRENT
€hange
specificas
™™
tion_correct?
YES
FDC
error
suspected
1S
}—
Spindle
motor
No
caver ers Ore
correct?
YES
A-A
Repair
broken
Line!
Write
protect
NO
Replace
write
| -
<Sensor
operate
protect
sensor.
normally?
YES
i
A
_Replace
PWB Assembly.
Fig.
5.5
Write
Error
——
—_JI
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