30 Jun
2005
30 Jun
'05
10:30 p.m.
On 7/1/05, Teo Zenios <teoz at neo.rr.com> wrote:
I was messing around with my Amiga 2000HD today
(installing a 2.04 Kickstart
Rom to replace the 1.3 Kickstart among other things) and now my internal
floppy is dead. The drive worked fine after I changed the rom and the HD and
installed workbench 2.04, it was when I reassembled the system and rebooted
I noticed the floppy was no longer working. I took the drive out and didn't
notice any smell or burnt traces (as if I had the power connected backwards
and it fried), any way to troubleshoot one of these things (Chinon FB-354)?
Hmm... given that there isn't _one_ FDC chip - perhaps you could check
your 8520s? Those control the floppy digital signals (presuming your
problem is that the drive doesn't light up, as opposed to a spinning
floppy that won't read - that can be analog electronics or Paula).
You could remove the drive, check carefully for shorts so you don't
fry another machine, and try it on another machine (as DF1, to be most
helpful).
I'd also make sure you didn't dislodge the DF1 jumper on the
motherboard - the A2000 is quirky in how it supports drive selects and
internal/external drive numbers. This shouldn't affect DF0, but it
_will_ affect DF1.
I guess I should have asked first - you do have the schematics, don't
you? They are at the back of the Tech Ref manual if nowhere else (for
pre-v6 mobos - not sure where to find late-model schematics).
I guess the point is - determine if it's the Amiga or the floppy drive
first. As for troubleshooting the drive itself, I don't know that a)
there's enough information to successfully poke around in the innards,
or b) you'd be able to find parts to fix if it you could.