RetroSpector78
Experienced Member
Hi,
I have an IBM PC XT with a Tandon TM100-2 floppy drive that is having some issues.
C43 blew upon startup so I replaced that one, and I found another cap that was bad according to my ESR meter. I replaced that cap also and cleaned the heads but it is still not reading disks.
Upon startup I can see the drive motor spinning, and I also see the stepper motor moving the heads back and forth (as you typically see on a floppy drive) as illustrated in the video below :
https://drive.google.com/drive/folders/1OwIBybe4KfYp6EmhBh941P3CqeSK9hHk?usp=sharing
But when trying to access a disk (doing a directory listing, or trying to format a disk), i see the disk spinning but the head is not moving.
This is then followed by general failure reading drive, or a bad track 0 during formatting.
The floppy controller / cables seem to be ok as I've tested it with another drive. Drive termination and dip switches also seem to be fine.
What could be causing the fact that the heads move back and forth on startup, but they aren't doing anything when trying to access a disk ?
Thx
I have an IBM PC XT with a Tandon TM100-2 floppy drive that is having some issues.
C43 blew upon startup so I replaced that one, and I found another cap that was bad according to my ESR meter. I replaced that cap also and cleaned the heads but it is still not reading disks.
Upon startup I can see the drive motor spinning, and I also see the stepper motor moving the heads back and forth (as you typically see on a floppy drive) as illustrated in the video below :
https://drive.google.com/drive/folders/1OwIBybe4KfYp6EmhBh941P3CqeSK9hHk?usp=sharing
But when trying to access a disk (doing a directory listing, or trying to format a disk), i see the disk spinning but the head is not moving.
This is then followed by general failure reading drive, or a bad track 0 during formatting.
The floppy controller / cables seem to be ok as I've tested it with another drive. Drive termination and dip switches also seem to be fine.
What could be causing the fact that the heads move back and forth on startup, but they aren't doing anything when trying to access a disk ?
Thx