Rainbow PSU Wiring and H7842 Power Supply Unit Schematics

This document provides a set of detailed schematics for the H7842 Power Supply Unit (PSU) and its associated control modules. It includes wiring diagrams for PSU connections to disk drives, fans, and switches, as well as specific circuit boards for the mains rectifier, startup PSU, chopper driver, and control logic. The diagrams cover power distribution, regulation, and monitoring circuits, including components like the SG3527 chopper controller.