The Pacesetter 607 has a specific thread path. One wrong loop will cause bird’s nests, skipped stitches, or broken needles. The manual provides a step-by-step diagram that is much clearer than any YouTube video for this specific model.
ManualsLib is a crowd-sourced library of appliance and sewing machine manuals.
Upload the PDF to Google Drive, iCloud, or Dropbox. Then, install the PDF reader app on your tablet. Keep your tablet on a stand next to your sewing machine. You can zoom in on thread diagrams without dirtying paper pages with fabric lint or oil.