PDF reference of 66.9 KB for the KA7500C, a pulse-width-modulation controller from the KA7500 family, compatible with the classic TL494 design. It is catalogued as a schematic but is effectively the chip datasheet. Such controllers drive many ATX power supplies, inverters and chargers, so the pinout, oscillator setup and dead-time control described here help when a supply refuses to start. Measure the reference output, oscillator waveform and drive outputs against the document, and confirm the C revision on the chip marking.
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.