- Thread starter
- #21
W
w_tom
On Jan 10, 11:47 pm, "DaffyD®" <daf...@woohoo.com> wrote:
> ... However, I tried unplugging the cable from the floppy, powered up
> the computer, and the green light still remained on. The problem is
> with thepower supplybut that's as far as I can get since I don't have
> the equipment to test voltage and such.
Every recommendation (including one to replace the power supply) has
a common factor. In each case, the recommendation comes without first
learning the circuits.
Unlike other drives, the floppy is turned on and off by a switch on
the floppy drive controller. Switch on controller connects to floppy
via a cable. If the cable is reversed, the floppy 'sees' a closed
switch and powers on. If cable is not reversed and switch is failed,
then floppy 'sees' a closed switch and powers on. If cable is
disconnected from controller (power connector remains connected) and
floppy powers off, then problem is directly traceable to the switch on
floppy controller.
Rather simple analysis when one first learns the interface signals -
when one first asks why a reversed cable would also cause same
symptoms. Notice how many knew the symptom but never once asked why.
'Knowing' without also knowing 'why' explains so many replies without
a useful conclusion.
Report what happens when you perform those above tests.
> ... However, I tried unplugging the cable from the floppy, powered up
> the computer, and the green light still remained on. The problem is
> with thepower supplybut that's as far as I can get since I don't have
> the equipment to test voltage and such.
Every recommendation (including one to replace the power supply) has
a common factor. In each case, the recommendation comes without first
learning the circuits.
Unlike other drives, the floppy is turned on and off by a switch on
the floppy drive controller. Switch on controller connects to floppy
via a cable. If the cable is reversed, the floppy 'sees' a closed
switch and powers on. If cable is not reversed and switch is failed,
then floppy 'sees' a closed switch and powers on. If cable is
disconnected from controller (power connector remains connected) and
floppy powers off, then problem is directly traceable to the switch on
floppy controller.
Rather simple analysis when one first learns the interface signals -
when one first asks why a reversed cable would also cause same
symptoms. Notice how many knew the symptom but never once asked why.
'Knowing' without also knowing 'why' explains so many replies without
a useful conclusion.
Report what happens when you perform those above tests.