Vox Valvetronix ToneLab LE Owner's Manual page 16

Monitor Block Diagram
The LCD MONITOR will contain an main board, an inverter/power board, keypad board and
internal adapter which house the flat panel control logic, brightness control logic and DDC.
The Inverter board will drive the backlight of panel and the DC-DC conversion.
The Adapter will provides the 12V DC-power to inverter/power board