Paddy. Your PC will not read a Technics Sequence file,
A local friend has a PR903 so I am quoting from memory.
1. Load your sequence back into your PR.
2. In the PR save option there is a choice of Technics or General Midi (GM).
3. Chose GM and save to floppy. The saved file should have an extension .mid
This will now be recognised by any sequencing software on your PC.

Graham UK