In CINRAD technical support, the diagnosis and location of comprehensive faults caused by highvoltage load ignition are very complex and difficult since those faults are characterized by multispots and multicomponents involved and long time required for repair. According to the control and monitoring signal flow of transmitter high voltage, a troubleshooting procedure is developed for the radar transmitter. The standardization and practicability of the procedures are illustrated by a typical case study focused on the rapid renovation of the faults. This further proved the importance of troubleshooting procedures in CINRAD technical support.