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4.4.5. SDD DIAGNOSIS
Make sure that connecting cables, connectors and AC adapter are not loose or disconnected prior to testing.
No.
Symptom
1
Access lamp does not
light.
2
Cannot insert floppy disk.
Cannot remove floppy disk.
3
Does not boot from SDD.
4
Cannot read from floppy
disk.
Cannot write to floppy disk.
5
Floppy disk is scratched or
otherwise damaged.
6
Content of floppy disk is
destroyed.
7
Damage to contents written
to floppy disk.
Damage to contents read
from floppy disk.
8
Abnormal sound.
9
Diagnostic Test reports
problem in FDC.
Troubleshooting
procedures
No.
Replace the SDD.
1-1
Does operation return to
normal?
Replace the LED PCB.
1-2
Does operation return to
normal?
Replace the Main PCB.
1-3
Does operation return to
normal?
In the floppy disk warped or
2-1
bent, or labels interfering?
Are there system files on the
3-1
media?
Is the floppy disk format
4-1
correct for the operating
system currently being used?
Does this occur for a specific
4-2
floppy disk?
Try cleaning the disk heads.
4-3
Does this fix the problem?
Replace the SDD.
4-4
Does operation return to
normal?
Replace the SDD FPC.
4-5
Does operation return to
normal?
Try cleaning the disk heads.
5-1
Does this fix the problem?
Was the eject button pressed
6-1
while
the
system
accessing the disk?
Replace the SDD.
6-2
Does operation return to
normal?
Does this occur for a specific
7-1
floppy disk?
Replace the SDD.
7-2
Does operation return to
normal?
Replace the SDD FPC.
7-3
Does operation return to
normal?
Does it sound like the head is
8-1
moving?
Does the abnormal sound
8-2
stop when the motor stops
running.
Replace the SDD.
9-1
Does operation return to
normal?
Replace the SDD FPC.
9-2
Does operation return to
normal?
4 - 9
Source of
problem
Result
YES
SDD
NO
Go to No. 1-2
YES
LED PCB
NO
Go to No. 1-3
YES
Main PCB
NO
SDD FPC
YES
Floppy disk
NO
SDD
YES
Main PCB
NO
Software
YES
Go to No. 4-2
NO
Floppy disk format
YES
Floppy disk
NO
Go to No. 4-3
YES
Heads were dirty
NO
Go to No. 4-4
YES
SDD
NO
Go to No. 4-5
YES
SDD FPC
NO
Main PCB
YES
Heads were dirty
NO
SDD
YES
Operating mistake
was
NO
Go to No. 6-2
YES
SDD
NO
Main PCB
YES
Floppy disk
NO
Go to No. 7-2
YES
SDD
NO
Go to No. 7-3
YES
SDD FPC
NO
Main PCB
YES
Normal
NO
Go to No. 8-2
YES
SDD
YES
SDD
NO
Go to No. 9-2
YES
SDD FPC
NO
Main PCB
Component
LD703
IC3
IC3
IC3
IC3
IC3
IC3
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