Hi5a controllermaintenanceHi5a-S/P/C/T/J Controller Maintenance Manual4. Basic Components of Controller4.3. The Function of Each Component4.3.2. Main board (BD511)On this page4.3.2. Main board (BD511)4.3.2. Main board (BD511)4.3.2.1. Outline4.3.2.2. Connector4.3.2.3. Display Devices4.3.2.4. Setting Unit