Sharp FDD-412A - Page 88

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