Abstract：Philips iU22 color Doppler ultrasound is the basic detection equipment of the imaging department. However, with high
frequency and long-term use, equipment failures gradually occur. The structure of Philips iU22 color ultrasound was introduced in
this article. According to the operation principle of the equipment, system startup failures and abnormal probe image failures were
investigated one by one, and then the device was restored and normal operation by replacing the HDD1 hard disk and channel board.
Relying on the operation principle of the equipment during the troubleshooting process, from simple to difficult, it is possible to
quickly restore the operation of the equipment by performing replacement inspection on the color Doppler components. We hope that
the idea of fault repair in this article can bring inspiration to the daily work of the majority of clinical engineers.
