First, the failure phenomenon:
2D image and blood flow of the machine is abnormal, the blood flow knob is not working good.
Second, the failure analysis:
According to the above failure phenomenon, it can be judged that the image channel of the machine is abnormal. Therefore, it is suspected that there is a problem with the BF channel board.
It was also found that the knob of blood flow section was not working goog, so the control panel was disassembled and the circuit board of the blood flow button needs to be repaired.
Third, testing and repair:
After replace the BF channel board and repair the circuit board of the blood flow button, everything back to normal.