REPAIR FLOPPY DRIVE

Your TEAC FDD (floppy disk drive) is a Tri-mode device (720 KB, 1.2 MB, and 1.44MB)

The "235" part of the model number indicates the drive's form factor (size) is 3.5 inches.
The "HG" part of the model number indicates that the FDD is a Tri-mode device, with the 3 modes
given above.

The manufacturer notes that it has no jumpers, but every FDD I've ever seen has jumpers for
bus master/slave selection. Either master or slave will work.

Here's the manufacturer's web site URL for your TEAC floppy disk drive:
http://www.teac.com/DSPD/support/floppy_drives/fd235hg_id_your_drive.htm

Here's the info on the NEC FD 1137C drive:
--------------------------------------------------------------
Enclosure Type Internal
Interface Floppy (IDC)
Platform: PC
Technical Features Capacity 1.44 MB,2.8MB,360MB,720KB,1MB,640KB
Minimum System Requirements:
Operating System Microsoft DOS • Microsoft Windows 3.1 • Microsoft Windows 95 • Microsoft Windows NT
Form Factor: 3.5" floppy disk drive

Here's the best info I found on your NEC FD 1137C Floppy disk drive:
http://www.aliexpress.com/fm-store/602209/210081532-394871196/NEC1137C-DATE1992-floppy-Adaptive-720K-1-44M-120M-Capacity-120M-40PIN-Interface-3PIN-Jumper-FD1137C-NEC1137C.html

Aqui wapa ->link.

Here is a link to download the drivers for that model. Follow the instructions to install it correctly.

http://www.teac.com/DSPD/support/floppy_drives/floppy_drives.htm

Here is a link to the manual for the FD55-BV drive. The jumper settings are found within:

www.bitsavers.org/pdf/teac/FD55BV_Spec.pdf

Here's a link to a document that contains the pin-out of the interface as well as other relevant data:

http://www.teac.com/DSPD/pdf/nfd0300a.pdf

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Take the drive from the enclosure, remove the top cover from the floopy drive, you should be able to GENTLY remove the floppy shield. Try not to stress the heads or wiring inside of drive. The floppy shield should come out the front.

This drive supports Ready signal or Disk Change signal on pin 34 (RY34 or DC34), has a large number of jumpers for various settings, thus (unlike the standard 235HF drive which works in PCs only) this drive can used to replace a 720k drive on older computers such as Amstrad CPC/PCW or Commodore AMIGA.

If you call TEAC and can verify the date of purchase they should be able to RMA it and replace it.

http://members.driverguide.com/driver/detail.php?driverid=45332