Brother PR600 - The Floppy Disk Cannot be Used Normally

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Failure Investigation
for Electronic Parts
Failure Investigation for Electronic Parts The floppy disk cannot be used normally.
The floppy disk cannot be used normally.
Use another floppy disk.
Y
N
Y
Does the machine function normally
when another floppy disk is used?
Connect it properly.
N
Y
Is the floppy-disk FFC properly connected
to connector CN2 on the floppy-disk PCB
and the disk drive connector? Is the
orientation of the FFC correct?
Change FFC.
Y
Does the machine function normally when the
floppy-disk FFC is replaced with a reliable one?
N
Change floppy-disk PCB.
Y
Does the machine function normally when the
floppy-disk PCB is replaced with a reliable one?
N
Change panel PCB.
N
Does the machine function normally when the
floppy-disk drive is replaced with a reliable one?
Change floppy-disk drive.