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Rencheng Repair Case: Hitachi Daijiro God image echo area has radial interference fault repair
Release time:
2025-03-12 09:41
Machine Type:Color Doppler Ultrasound Diagnostic Instrument
1. Malfunction Phenomenon:
After powering on, there is radial interference in the image echo area, and it cannot be used normally, as shown in the figure below:

2. Fault Analysis and Causes:
Since the machine can be switched on and off normally, and apart from the radial interference in the image, other operations can be performed normally, the possibility of a fault in the back end of the machine is ruled out. It has now been determined that this fault occurs in the front-end components of the machine. According to the fault image analysis, this is due to a problem with the front-end image processing. According to the principle of this model of machine, the possibilities for this fault are: RDBF board and RX board. Using the method of elimination, replacing the RDBF board, the fault remains. Replacing the RX board, the fault is eliminated. As shown in the figure below:

3. Fault Handling:
4. Maintenance Summary:
In the maintenance process of this fault, it is necessary to be familiar with the system structure and functional principles of the machine, understand which module is responsible for which function, and in the case of multiple possibilities for a fault, cleverly use the elimination method and substitution method to find the exact fault point, thereby eliminating the fault and ensuring the normal use of the machine.
Ultrasound image; diagnostic instrument;