Raspberry Pi 4 Model B Repack Full Schematic Guide

Early revisions (Rev 1.1) of the Pi 4 schematic lacked individual pull-down resistors on the two Configuration Channel (CC1 and CC2) lines, sharing a single 5.1kΩ resistor instead. This caused e-marked smart chargers to detect the Pi as an audio accessory and deny power. Revised schematics show individual 5.1kΩ resistors on CC1 and CC2, resolving compatibility with all USB-C chargers. PMIC Rails

The Pi 4 is power-hungry compared to its predecessors. The schematic reveals the complexity required to turn a 5V input into the various voltages needed by the BCM2711 processor. Raspberry Pi 4 Model B Full Schematic