A 6-pin block used for flashing a bootloader or firmware if the USB port isn't responding. Filament Sensor: A dedicated 3-pin port specifically for run-out detection. Pro-Tip for Troubleshooting
If your V4.2.2 board has (often marked with a letter "E" on the SD card slot), upgrading to a V4.2.7 will make your printer dramatically quieter. If your V4.2.2 already has silent TMC drivers (e.g., a "C", "A", "B", or "H" on the slot), the upgrade won't bring a noticeable performance improvement, and some users have reported layer-shift issues with the V4.2.7. Creality V2 2 Board Diagram
When installing a BLTouch on the V2.2 board, it is typically wired into the dedicated sensor ports or the Z-min limit switch port. A 6-pin block used for flashing a bootloader
Uses an ATmega2560 chip; requires a pin-board or header modification for BLTouch. If your V4