SE/30 with non-working yet known-good floppy

[broderbund]

Hey folks! I have been restoring my SE/30 and have gotten just about everything working post-recapping except the internal floppy drive. I have a known-good drive (tested with an SE board swapped into the SE/30) which the SE/30 is incapable of reading, writing or formatting. It powers up, the drive spins, and it can eject, but that's it. The drive head doesn't move forward or back. I've already replaced the SWIM chip with one from a IIci donor, as well as the Bourns filter at RP11. Any ideas for my next troubleshooting steps?

thanks!

 

[Nixontheknight]

try checking continuity between the SWIM and the floppy connector. I know SE/30 schematics exist somewhere, so that should help you should any traces not have continuity

 

[broderbund]

I should mention that I've checked continuity between the SWIM and: the floppy connector, the IC at UH7, and the 68030. Though it's worth doing again!