Repair of damaged cables. The cables used in veterinary B-ultrasound probes are multi-core high-shielded cables with very high quality requirements. The workmanship is very fine. The wires in the cables are tight, and there are hundreds of them, as thick as hair. Due to the multi-directional use of veterinary B-ultrasound probes, the bending and twisting of the cables will cause the insulation layer of the outer protection area of the cables to break, break, and expose the signal wires inside. The damage and disconnection of the shielding layer will cause interference ripples and defects in the image.

Fault phenomenon: When the veterinary B-ultrasound has serious interference with the display image, snow-like light spots appear on the full screen, and the brightness adjustment fails. Analysis and maintenance: Due to the influence of external force on the veterinary B-ultrasound probe or the operator's incorrect use, the probe position is improperly placed for a long time, resulting in the internal wire of the cable being broken. Open the outer leather cover, cut the total shielding wire horizontally, pick out the cracked wire, and after welding, wrap it with a layer of transparent tape. Use a multimeter to measure whether it is conductive. After it is conductive, connect the shield of this wire and wrap it with tape. If multiple wires are broken, the method is the same as above. Test the machine. After everything is normal, weld the outermost shielding wire and fix the outer leather cover with high-voltage insulation plastic tape. It has been used well for more than a year without any failure.

Repair of damaged crystal of veterinary B-ultrasound probe. Fault phenomenon: black shadows are mixed in the image detected by veterinary B-ultrasound, and there are black strip interference. Analysis and repair: Most of the piezoelectric crystals are used inside veterinary B-ultrasound probes. After long-term use, the crystal will age naturally. Irregular use or external force such as falling or bumping will cause damage to the probe crystal. After the crystal is damaged, the image detected by the veterinary B-ultrasound detector will show signal attenuation, black shadows, black strips, interference, defects and other blind areas in the image, which will make it impossible for doctors to diagnose, affect the quality of diagnosis, and even cause misdiagnosis.

This type of failure is caused by a short circuit in the veterinary B-ultrasound probe chip. The short circuit of the chip can be determined by measuring the power supply voltage of the chip. If the power supply voltage of a chip or chip group is lower than that of other chips, it can be determined that there is a short circuit in the chip or chip group. Replace the corresponding chip or chip group to restore the original characteristics of the probe and eliminate the interference.