Classic External Floppy Port Issue

[JustG]

As I alluded to in my SE/30 thread, I'm also working on a Classic.  I've running into an issue when plugging my FloppyEMU into the external port of the computer.  When in floppy emulation mode, I am able to select a disk image but the moment the computer begins to access the image, my FloppyEMU will go into a power reset loop, it will get to the self test screen, power cycle and repeat.

I've recapped the logic board and replaced the leaking caps on the analog board.  Voltages have been adjusted and are holding steady with several tests.  If I plug the FloppyEMU into the internal connector, no problems at all.

This isn't the end of the world but I would like to know if I can fix the external port.  Way easier than cracking the case to plug in the emulator.

 

[JustG]

After some additional testing, HD20 emulation works fine through the external floppy port.  Floppy emulation fails at the external port regardless of whether or not I have the internal floppy drive connected to the logic board.

 

[JustG]

Update:

Finally got a bit of free time to devote to this computer.  Turns out the hard drive was failing.  Drive has been replaced with a SCSI2SD and everything is working great!

 

[rplacd]

Oh! – why do you think that replacing the hard drive fixed the external floppy drive? Genuinely curious.

 

[JustG]

I had planned to replace the drive with a SCSI2SD unit from the beginning, it just happened to work out for troubleshooting.  End result is I have a completely recapped machine that is now rock solid.  I've been running it for at least a couple hours a day.

I did discover that the speaker is falling apart so I'll need to track down an appropriate replacement.