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Amiga computer related discussion => Amiga Hardware Issues and discussion => Topic started by: Dragster on November 15, 2008, 08:41:21 AM

Title: DF1 not working on A1200 help!
Post by: Dragster on November 15, 2008, 08:41:21 AM

Hi folks...

I just found that somethin'g wrong with my A1200T ;-(

I connected an external floppy disk drive and it doesn't work anymore... the drive is working OK on every other Amiga I connect it to, but not in the A1200. At first, I thought the problem could be the drive itself, but testing other external floppy drives made me realize it's the machine and not the drive. So, the drive doesn't get current from the A1200, it doesn't even do the click or spins when the machine is turned on (so that you can see the led blink once)... User startup shows it though. When I insert a floppy disk into it, nothing.. it does absolutely nothing.. nada!

What could be wrong? DF0 works perfectly...

Any help will be appreciated...

Thanks!

Dragster

Title: Re: DF1 not working on A1200 help!
Post by: Dragster on November 15, 2008, 02:32:43 PM

 :bump:

Title: Re: DF1 not working on A1200 help!
Post by: beller on November 15, 2008, 04:06:29 PM

Has the DF1: port ever worked on this machine?  I believe there are a certain percentage of the A1200 ESCOM boards that have dead external floppy ports.  I've learned to live without it...

Title: Re: DF1 not working on A1200 help!
Post by: rkauer on November 15, 2008, 07:39:46 PM

 Also did you check the rightmost pins on the external floppy port for power?

 IIRC, pin 13 is 5V and pin 23 is 12V. If no power, check the inside SMD resistors.

Title: Re: DF1 not working on A1200 help!
Post by: Dragster on November 16, 2008, 06:07:33 AM

@beller

Yes, and it's a Commodore original motherboard.. rev 1.d.1

Cheers

Title: Re: DF1 not working on A1200 help!
Post by: Dragster on November 16, 2008, 06:08:05 AM

@rkauer

Thanks for the advice mate. Will check that.

Cheers

Title: Re: DF1 not working on A1200 help!
Post by: Dragster on November 16, 2008, 07:35:52 PM

Well, this is weird. When I turn on the machine, the drive's activity led blinks once, however the mechanism doesn't work, the drive doesn't spin or do anything to do to read a disk inside it, it doesn't do the "click click" either (e.g. waiting for a disk). So, I'm not so sure the drive is not getting current...  could it be a BAD CIA chip?

As stated before, DF0: works with no problems, but I don't know if the same chip controls DF0: too...

Suggestions welcome.

Cheers!

EDIT: Fixed a typo

D.