Amiga 1200 floppy drive not working...

[britlord]

Guys I have a 1200 mainboard which I think is a escom one (cos of the white sticker). However, the TEAC FD-235HF 4161 floppy drive is not working with this board (1D4). I checked under the board and there's no jumper wire (Which is good eh??) and I checked the other 2 pins with my multimeter, and there's is a connection, so I don't need to solder a wire on thoses 2 pins (as in the Youtube video), so I can't figure out whats wrong. The board works with a external drive (DF1). But not with the internal DF0 one.. What's the odds that the drive is faulty (The drive came out of a 1200 but not sure which version or if it was working).. Also the drive looks like it hasn't seen much use (Still clean and shiny)... Oh does the drive need some hack or something to get it to work...


Mike...

 

[demolition]

I don't recognize that drive as an Amiga drive. Is it a PC drive? If so, then it needs some modifications before it can be used with the Amiga.
Maybe this can work: http://jope.fi/drives/fd235hfa529/

Don't you have some real Amiga floppy drive you can try on the MB to verify it?
It sounds like the MB does not have the Escom modification as not all of them do. My Escom A1200 is also unmodified and works with regular internal Amiga drives (and its drive also works on other Amigas).

 

[Ed.D]

Not sure if this will help but here's some info about TEAC drive jumpers from a Google search.

http://web.archive.org/web/20031211054018/http://www.teac.com/DSPD/pdf/3fd0020a.pdf

 

[ElectroBlaster]

Ohhh another Teac!

I wonder if the little capacitor on the underside has gone bad? Do you get "DF0:???" and total failure to read disks?

Also wondering if the drive has jumper blocks... a quick google suggests it does?

Also as others have said, test known working Amiga drives if you can to verify it is not your board!

If you board passes ok, then suspect the disk drive. I have a few Teac's here with some more on the way. I managed to fix two of them back along. There is a capacitor that sits underneath, near the front which I assume goes bad and renders the drive DOA. After fitting a new capacitor they sprung back into life

 

[britlord]

I don't recognize that drive as an Amiga drive. Is it a PC drive? If so, then it needs some modifications before it can be used with the Amiga.
Maybe this can work: http://jope.fi/drives/fd235hfa529/

Don't you have some real Amiga floppy drive you can try on the MB to verify it?
It sounds like the MB does not have the Escom modification as not all of them do. My Escom A1200 is also unmodified and works with regular internal Amiga drives (and its drive also works on other Amigas).

It's PC drive that ESCOM fitted, but I can't find a mod for the drive, as for using a regular internal Amiga drive , The only one that I have is in my other 1200, and I don't want to remove it, to try it on the Escom board..

- - - Updated - - -

Ohhh another Teac!

I wonder if the little capacitor on the underside has gone bad? Do you get "DF0:???" and total failure to read disks?

Also wondering if the drive has jumper blocks... a quick google suggests it does?

Also as others have said, test known working Amiga drives if you can to verify it is not your board!

If you board passes ok, then suspect the disk drive. I have a few Teac's here with some more on the way. I managed to fix two of them back along. There is a capacitor that sits underneath, near the front which I assume goes bad and renders the drive DOA. After fitting a new capacitor they sprung back into life

\

All I get is ????? in WB, as for Teac's they have lots of different boards...

- - - Updated - - -

Not sure if this will help but here's some info about TEAC drive jumpers from a Google search.

http://web.archive.org/web/20031211054018/http://www.teac.com/DSPD/pdf/3fd0020a.pdf

That board is not the same. as in my Teac drive...

 

[ElectroBlaster]

Are you able to get some pictures up?

I am currently working on a few PC configged Teac's. Some have no jumpers at all and can only be modded by soldering and using jumper wire.

EDIT: On the back! Where the floppy pins are, there should be a sticker. Where is reads "FD-235HF 4161" there should be another long code printed. If the label is not on the back, it will be on the top lid. I am wondering now... did you recently acquire this a1200? It could be a mashup of parts...

EDIT2: Check out my thread detailing my repair of an old A1200 Teac drive https://www.amibay.com/showthread.p...ead-quot-DF0-quot-disk-drives!&highlight=Teac

Also the thread that started it all and inspired me to fish out every dead drive I could find in my storage http://eab.abime.net/showthread.php?t=71760&highlight=Teac

 

[britlord]

The board came with the shields, floppy drive and the floppy cable too. What I see in WB is df0?????? Oh this floppy board is the same as in my drive, and in the red circle those jumpers are closed. (Mine is using 0HM resisters instead of a wire)..

Mike..

 

[ElectroBlaster]

The board came with the shields, floppy drive and the floppy cable too. What I see in WB is df0?????? Oh this floppy board is the same as in my drive, and in the red circle those jumpers are closed. (Mine is using 0HM resisters instead of a wire)..

Mike..

Ok this looks like one of the infamous Teac drives I have here! Where the large spindle/silver disc is (towards the front) is there a large blue rectangle thing soldered to the board with a small tiny smt capacitor? I think you have a proper A1200 Teac and I am leaning towards a failed cap as the cause of this drive not working Fairly simple to fix.

Edit2: Some sparse info for this drive! Your picture shows me there are a row of small jumper blocks sitting near the power plug! Same sorta thing you get on hard drives but a little smaller and usually white in colour.

On this link look for "FD-235HF-4xxx TEAC drives", there will be a small picture shown with it and a diagram of the jumpers. If yours looks the same then it is a proper a1200 drive: http://embeddedsw.net/EMUFDD_TEAC_Jumpers.html

Edit3: This is what your looking for - https://www.amibay.com/attachment.php?attachmentid=66919

 

[britlord]

Yes I see the small SMD CAP. Also what your saying the drive is a still proper a1200 drive (Escom 1200 one) Oh as for the jumper (with the white plug) The first pic is mine (Just 2 headers)...

Oh Here's a pic of a cable that was made also (For the FD-235HF)

Mike..

 

[ElectroBlaster]

Yes I see the small SMD CAP. Also what your saying the drive is a still proper a1200 drive (Escom 1200 one) Oh as for the jumper (with the white plug) The first pic is mine (Just 2 headers)...

Oh Here's a pic of a cable that was made also (For the FD-235HF-4161)

Mike..

Thanks for the floppy lead picture! Will come in useful

I bet you the capacitor has gone bad... have a nosey at it, look for dull grotty looking solder legs on the or around the cap. Use a cotton ear cleaner bud thingy and see if any crud comes off. I found one of mine was a bit corroded and I almost lost a solder pad. Managed to save her though

 

[britlord]

Well Cap looks clean, Oh I add another pic of the floppy cable. Can someone guess what the value of that cap is cos it's not fitted in my drive...

Mike..

 

[ElectroBlaster]

Well Cap looks clean, Oh I add another pic of the floppy cable. Can someone guess what the value of that cap is cos it's not fitted in my drive...

Mike..

I have the exact same drive here! I have to double check... it even has the same amount of jumpers etc. I shall report back asap.

EDIT: Flips! The drive is slightly different. It is a HG model not HF I assume by using the cable it will still function ok. I will fish out all my other teac's and see if any are an exact match.