Microchip PIC14000 datasheet, a 766 KB PDF. This mixed-signal microcontroller integrates analog measurement features and was commonly used in battery chargers and measurement equipment, which makes the document relevant to servicing such devices. It contains the pin diagram, analog module descriptions, calibration notes and electrical specifications. Use it to check supply and reference voltages and to identify signal pins while tracing a fault, and confirm the marking on the package matches before replacing the part.
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 @datasheet. 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.