FDD issues on FS-A1F; New belt not helping.

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Por Ninja_Kurosai

Resident (34)

Imagen del Ninja_Kurosai

13-07-2015, 15:32

Hi again guys, I posted a recent topic in the Software sub-forum about my MSX-BASIC not working. Naturally I've also attempted to run the system disk that came with my computer (a Panasonic FS-A1F purchased on eBay).

At first, the floppy drive's red light wasn't on ( I don't think...). When selecting the disk option on the main boot screen I would get an error message stating there was no disk present. So I took the computer apart, and checked the FDD. Perhaps a cable was loose or something, because after checking a few things and putting it back together, the red light now turns on.

However I started hearing the rotor spinning loudly; finally I realized that the previous owner had removed the rubber belt altogether! So after purchasing a new belt online and scraping the gummy remains of the old belt, I install the new one, and boot up the computer WITHOUT a disk inserted. The motor turns, along with the belt; but as soon as I insert a floppy disk, the drive stops working. And the only sign I get from the drive is the still ever-on red light (meaning from what I've read online that the drive is not being recognized as connected properly?)

I'm waiting on my MegaFlashRom now so this problem won't be such once that arrives. I'd still very much like to be able to fix this drive to enjoy some FDD games in the mean time though! Any ideas? oO

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Por Grauw

Ascended (10070)

Imagen del Grauw

13-07-2015, 19:53

Is the belt tight enough? If possible maybe you can visually inspect the drive and the belt while the system is turned on?

I had put one that was too wide in my turboR at first, the drive spun but it gave disk offline errors, then I tried a tighter one and everything works like a charm now.

Por Ninja_Kurosai

Resident (34)

Imagen del Ninja_Kurosai

13-07-2015, 22:05

I did visually inspect it while it was on like you suggested, and saw the rotor and the middle piece turning, although I'm not sure if at the correct speed or not since I've never seen one up close like this. Then like before, once I pop in the floppy disk, the motor stops turning all together.

Regardless of whether or not I insert a disk before booting the system, the FDD light stays on during the entire time the computer is powered on. Not sure if this may be a hint to what else is wrong? Could the issues I'm having with MSX-BASIC effect this as well? Eek!

And I'm not sure about the tightness of the belt either, I purchased one that was specifically advertised as a replacement belt for my exact model...(FS-A1F)

Por Manuel

Ascended (18162)

Imagen del Manuel

14-07-2015, 06:56

Sounds like the FDD connector is upside down...

Por gdx

Enlighted (4711)

Imagen del gdx

14-07-2015, 08:07

...or connected to the wrong place.

Por Ninja_Kurosai

Resident (34)

Imagen del Ninja_Kurosai

15-07-2015, 01:41

Uh that was it -___-

It was upside down -_________________-

So now the light flashes and I can hear the disk reading...what are some commands to test out in MSX-BASIC to list files, or what should I do with the MSX-DOS disk? I'm a completely noob to this stuff, sorry. I noticed also sometimes when I insert a disk it continues to make the reading sound like its stuck in a loop...is that normal? Shocked!

EDIT: Now after trying a few things, I've noticed I can't format the disk or access it. I hear a light grinding sort of noise in the drive like something is pressing against the motor or disk but when I view it openly there is nothing that stands out. I get "Not Ready" when I try to format.

Por Manuel

Ascended (18162)

Imagen del Manuel

15-07-2015, 10:00

So, your disk drive is not working properly. Is all the black goo from the old belt properly removed?
Hard to say what is wrong from here...

Por -Neo-

Champion (386)

Imagen del -Neo-

16-07-2015, 00:00

What does properly removed entail Manual? My experience is that it is very difficult to get it all removed. I still have some black stuff on the little copper wheel for example and on the big black plastic wheel it's very difficult to see whether there are remains. How would you clean that best?

Por gdx

Enlighted (4711)

Imagen del gdx

16-07-2015, 01:31

A hard toothbrush and alcohol?

Por Ninja_Kurosai

Resident (34)

Imagen del Ninja_Kurosai

17-07-2015, 18:03

I did a really good scraping of the goo and remains of the old belt. Used alcohol & "goof-off" so I have no doubt this is unrelated to the current issue. My only remaining theory would be what Grauw mentioned, perhaps the belt is just not of the precise measurements required for this particular FDD model...

I've messaged the seller of the belt in hopes that he may have other sizes I could possibly swap out. And I can remember making a mental note of several clear belts that one user was offering to sell, compared to the black one that I'd bought and attempted to use. Where would be the best place I could purchase a belt SPECIFICALLY for the FS-A1F drive, as Grauw suggested above? Eek!

I may also be missing a huge problem not noticed until I google imaged several FDD drives unconvered...it would seem that the bigger end the belt is attached to has a slick black finish on it already, whereas some phots (ableit of different FDD models) show the same part with the belt wrapped far enough inside that it is contained under the top spindle holes of the peice... ?

Por madscient

Master (182)

Imagen del madscient

22-07-2015, 17:12

If you connected the cable in upside-down, the power line of the drive will be shorted...
It will be causing crash the FDC chip on the mother board.

If my assumption was correct, unfortunately, FDC will never work again...

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