Abstract:Based on some phenomena of a complex failure in ZhouShan CINRAD-SB transmitter during the first running period, combining with repairing experiences of electronic equipments, the failure source and some electronic circuits of other failure units induced by the former failure are analyzed, especially, some correlative principle failure diagrams are drawn, the process of repairing these failures was in detail introduced on IC chip/electron-element. In fact, these principle failure diagrams and repairing experiences are useful to diagnose failures of CINRAD-SB transmitter on IC chip/electron-element. In the end, as it was the fact that transmitter high voltage shorting-circuit frequently happened during the first period, some suggestions to protect from the similar failures taking place are put forward.