HP 6259B, 6260B, 6261B, 6268B,6269B Operating & Service Manual
This is a 74 page printed manual and includes an 11" X 17" foldout board layout (no schematic)
HP P/N 05950-1766
Manual applies to the following SN prefix
6259B: 1535A-00651 & above
6260B: 1545A-01026 & above
6261B: 1543A-00551 & above
6268B: 1539A-01481 & above
6269B: 1535A-01631 & above