You can find a detailed breakdown of the board's I/O ports and jumping cap settings for panel voltage (3.3V/5V/12V) on Firmware Repositories:
Typically +3.3V, +5V, or +12V DC, adjustable via jumping caps Software Download and Installation Tr67.03 V3 Software Download
Since this is a universal board, you use the remote control to access hidden menus or change settings: Service Menu Input + 208 Menu + 1147 Logo Setting You can find a detailed breakdown of the