Part four of the Sony K700 schematic collection, a compact 301 KB PDF that probably covers a single circuit section, though the name does not say which. Combine it with the other numbered parts for a full view of the handset. Use it to trace signal and power lines, identify reference designators and locate components while diagnosing shorts, charging faults or dead peripherals. Open it in a standard PDF reader and check the PCB markings against the drawing before replacing parts.
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 @mobileshematic. 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.