Hi5 controllermaintenanceHi5 Controller Maintenance Manual4. Basic Components of Controller4.3. The Function of Each Component4.3.4. Servo Board (BD542)On this page4.3.4. Servo Board (BD542)4.3.4. Servo Board (BD542) 4.3.4.1. Outline4.3.4.2. Connector4.3.4.3. Display Unit4.3.4.4. Setting Unit