Oncology Systems Education - Millennium Multileaf Collimator System & Maintenance Guide – Understanding the System MLC Head Assembly – Power Switch, Head Teanseiver PCB, Communication with the Motcomm PCB, Interfacing with the Optical Calibration System, Interfacing with the Service Panel, Interpreting the LEDs, Motor Driver PCB, Supplying Motor Power to all the Carriage Motors, Braking a Motor Dynamically, Turning On and Of the Carriage Mechanical Brake, Monitoring the Status of “Switched Motor Power”, Optical Receiver and Infrared Emitter PCBs, Initialization, Leaf-at-Cal, Secondary Feedback PCB, Leaf Secondary Feedback, Carriage Secondary Feedback, Power Distribution PCB, Voltage Supervisor, LEDs, Voltage Regulator, Fuses, Motor Interconnect PCB, Motor Connectors, Jumper Settings, Flex Cable Connector, Insulator, Head DC Power Supply Assembly AC Power Conditioner Debugging Tools – Service panel PCB, stand Alone Mode, Motorcable Interface PCB, Integrated Node Motor Driver Assembly – Carriage Retract Limit Switch, Fiber Optic Cables, Motors, Encoder, Carriage Mechanical Brake This guide provides procedures for monitoring and calibrating the field-shaping capabilities, performing periodic maintenance inspections (PMIs), installing and using the diagnostic program, and troubleshooting this precision apparatus. This Guide is very helpful for Clinac Service Personnel.