OK－ⅡS型前庭功能检测仪是日本80年代产品，目前很多医院都在使用，但均无图纸，维修困难。日前我们刚好排除了一例较为复杂的故障，现叙述如下，供同行参考。回故障现象仪器开启后能听到主电机转动声，但按下加速按钮，转椅和转篷均不能启动。2故障检修检查主控制台电路，无 The OK-IIS vestibular function tester is a product of Japan in the 1980s. Many hospitals are currently using it. However, there are no drawings and maintenance is difficult. A few days ago we just ruled out a more complex fault, which is described below for reference by peers. Back to the Symptom When the instrument is turned on, it can hear the sound of the main motor, but when the accelerator button is pressed, neither the swivel chair nor the canopy can start. 2 troubleshooting check main console circuit, no