159 MB 5 1/4 Inch Winchester Disk Drive

This document contains the field maintenance print set for the RD54 159 MB 5 1/4 inch Winchester disk drive. It includes parts lists, revision history, and revision matrices for various configurations of the drive. The document also provides technical notes regarding hardware revisions, including changes to HDA base casting coatings, resistor additions for specific vendor part numbers to resolve sizing issues during formatting, and servo read circuit enhancements.