The Raspberry Pi Foundation publishes the Raspberry Pi 4 Model B schematics and board layout files on their support site; check the official Raspberry Pi documentation for the latest PDF/EDA sources. (Use the latest published schematic for exact part numbers and board revisions before building or modifying hardware.)
: The schematic details two Micro-HDMI ports , each capable of driving 4K displays at 60fps. Raspberry Pi 4 Model B Full Schematic
Understanding the hardware architecture of the Raspberry Pi 4 Model B Go to product viewer dialog for this item. The Raspberry Pi Foundation publishes the Raspberry Pi
– Some individuals have traced Pi 4 PCBs and published partial schematics. These are not verified , may contain errors, and can be taken down for IP reasons. Search carefully, but use at your own risk. – Some individuals have traced Pi 4 PCBs
: Provides electrical specifications, thermal limits, and physical dimensions essential for hardware integration.