Jumpering for NEC FD-1165H 8-inch floppy drive

From: Steven N. Hirsch <shirsch_at_adelphia.net>
Date: Sun Jan 4 09:47:35 2004

On Sat, 3 Jan 2004, Tony Duell wrote:

> > The "H" model is older and uses a square 6-pin Molex connector (same as
> > all my other 8-inch drives), so I'm sure the voltages are correct.
> Has this drive ever worked in this system? If not, you might be missing
> some voltage (like -5V) that's not needed by some drives. Have you
> actually checked the PSU voltages at the drive with a voltmeter?

To my knowledge, these drives don't require -5V but, yes, I did check at
the logic board itself.

> > Anyone have a suggestion for troubleshooting?
> Yes. Trace back from the motor to find how it's controlled (or if you
> have a schematic, look there). Find out what signals are needed to turn
> the motor on (e.g. a disk-inserted sensor) and find out which are
> missing. Find out where the motor switching circuit gets its power from,
> and make sure that's present and correct.

I'll take a deep breath and start poking through the circuit. Thanks for
the pointers!

Received on Sun Jan 04 2004 - 09:47:35 GMT

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