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how to test a Teac FD-55GFR 5.25 Floppy Drive

November 14, 2012 at 00:46:49
Specs: Windows XP

I have bought couple of Teac FD-55GFR 5.25" Floppy Drives. Is there a way to test them on the bench to see if they are good? Any help would be greatly appreciated. Thank you.

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#1
November 14, 2012 at 02:20:57

Hi Ben, if you mean without using a pc it would be a lot of work/impossible to properly *bench* test these.

The (simple) way I do this, is to install the drive in a pc and then read and write a floppy disc. It is best to use a floppy that has been formatted and written to elsewhere.

Before installing the drive, blow out any dust etc. with a hairdryer set to cold and maximum blast. Use a long thin brush to assist.

Gently clean the heads with a bent cotton bud/q-tip dipped in isopropyl alcahol
(liquid that comes with a cd/dvd cleaning kit)

Please advise back on progress.

Good luck - Keep us posted.


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#2
November 14, 2012 at 08:35:24

Thank you Mike, I don't have an old pc to try what you suggested. I think there should be a way to test the motor on this drive. I thank you very much again for reponding to my question. Have a great day.

Best regards,

Ben


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#3
November 14, 2012 at 11:12:22

The motor is probably the least of your worries. I have never seen a motor go bad in a floppy drive. The most common problem with floppy drives is the heads become missaligned

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Related Solutions

#4
November 14, 2012 at 11:48:30

If you power one up I think it'll do kind of a 'self test' where the motor moves the heads back and forth for one cycle. But as already mentioned, that won't mean much.

And you don't really nead an 'old' computer to connect the drive to. Just one with floppy port. (Or maybe a computer with a floppy port IS old.) As long as you can provide a floppy cable the bios should still be able to see a 1.2 Meg floppy drive.


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#5
November 14, 2012 at 15:36:24

Thank you very much for the reply. I am only intrested in the motor on this drive. I think that I have to find the circuit diagram for this, but thanks again for you time.

regards,

Ben


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#6
November 15, 2012 at 04:55:38

The stepper motor or the one that drives the disk? The latter is an integral part of the drive and probably of little use for anything else. The stepper motor can be useful but if you know enough to use it than it ought to be fairly simple to test it.

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#7
November 15, 2012 at 08:23:26

Thank you ijack, not the stepper motor, I mean the motor that has big round cover on it. I think it is a brushless servo motor.

Regards,

Ben


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#8
November 15, 2012 at 09:15:07

I believe that if you just plug a power supply into the drive and then close the latch then the spindle should rotate momentarily. It's possible that you may need to insert a disk into the drive. It's a long time since I've had to work with floppies, and I'm relying on an increasingly failing memory, so I'm not 100% sure about that.

Still, at least if it does rotate then you know the motor is good; if not, you're back to square one.


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#9
November 15, 2012 at 11:56:13

Thank you very much for the reply ijack, I have taken the servo motor out, I have to find the circuit diagram for the pc under the round cover and try a few things and see if it works. Again I greatly appreciate your time.

Best regards,

Ben


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#10
November 29, 2012 at 07:49:37

Take a look at the circuit traces and wiring on the board from the power connector. Black and red is what you need to worry about. Find those 2 on the motor and apply 5V.

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