Abstract：This paper aims to understand principle and maintenance method of Varian 2300C/D medical
linear accelerator and similar models UDRS interlock faults through the analysis of classic faults.
By summing up UDRS interlock fault during daily using process, taking advantage of corresponding
drawings and data, and combining with specific cases for analysis, principle of UDRS interlock fault has
been understood, and maintenance procedure were taken. There were several causes of UDRS interlock
problems, positioning of which should be taken according to different phenomena and the analysis of the
PFN related circuit, RF DRIVER and AFC control circuit. Afterward, troubleshooting of the fault could
be carried out according specific conditions and fault principle. UDRS interlock fault could be solved
quickly by analyzing device drawing and PFN, RF DRIVER and AFC parts. This method is simple and
effective.
徐升，黄金汉，杨群堂，罗传文，
莫文杰，唐浩. 瓦里安2300C/D型医用直线加速器伺服剂量率联锁的检修[J]. 中国医疗设备, 2017, 32(7): 88-90.
XU Sheng, HUANG Jin-han,
YANG Qun-tang,
LUO Chuan-wen, MO Wen-jie,
TANG Hao. Troubleshooting of Varian 2300C/D Medical Linear Accelerator UDRS
Interlock. China Medical Devices, 2017, 32(7): 88-90.
