Schematic in PDF for the IBM ThinkPad T61, about 2.21 MB. The name states no board number, revision or graphics option, and T61 boards were made in integrated and discrete graphics versions, so match the document carefully to your planar. With it a technician can trace adapter input and charging circuits, follow power rails to the CPU, chipset and memory, and locate parts around a short or missing voltage. Any PDF reader opens it, and text search on net names speeds up tracing between sheets.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @cyberlanelectonik. Enginerys does not host this file.
How to open a .pdf file
The standard format for schematics, block diagrams, power-sequence charts and service manuals.