IBM 5150 - Some Documentation Pointers
"An Introduction to the PC"
Pages 1101-1110 (PDF pages 1133-1142) of Upgrading and Repairing PCs - Tenth Anniversary Edition
IBM's product announcement
Click on this link.
IBM manual - 'Guide to Operations'
Click on this link to get to the IBM area of the 'Manuals' web page.
IBM manual - 'Technical Reference'
Click on this link to get to the IBM area of the 'Manuals' web page.
Circuit diagrams
Click on this link.
Part numbers
Included in a 'parts catalog' at here.