Abstract：As a subsystem of medical linear accelerator, the injector is responsible for providing a stable power supply for the electron
gun. The failure of the injector will affect the normal treatment of the accelerator. However, the circuit of the injector component
is complex and the maintenance is difficult. In this paper, two cases of domestic AccStar linear accelerator injector failure caused
by beam failure of the equipment, were introduced. And oscilloscope and multimeter were used to measure and check the filament
voltage circuit, injector high voltage resistance and injector plate voltage circuit in the injector assembly. Two failures were found
to be caused by the damage of the filament voltage regulator chip U2 in the injector module and the TVS tube in the injector input
circuit. Based on the analysis of two cases of injector component failure maintenance, this paper summarized a set of maintenance
process, which could quickly determine the cause of failure, shorten the maintenance time, and provide reference for the maintenance
of medical linear accelerator.
彭旭东，何垠波，李光俊. 国产AccStar医用直线加速器注入器故障维修2例[J]. 中国医疗设备, 2022, 37(12): 167-170.
PENG Xudong, HE Yinbo, LI Guangjun. Two Cases of Failure Maintenance of Domestic AccStar Medical Linear Accelerator Injector. China Medical Devices, 2022, 37(12): 167-170.