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Q: After startup, there is no video display, and the machine is unable to work normally.

A: Firstly examine whether the network power supply ~220V is normal, then examine whether the protective tube is on or off. If the above two items are normal, open the casing to examine whether the DC voltage output of the switch power supply is normal. If it is abnormal, repair or replace the power supply; if it is normal, judge the fault reason according to different work status of the machine.

Q: After startup, there is no video display, but the fan runs normally, and the switch power supply works normally.

A: Firstly inquire whether the user has the external video equipment such as workstation or printer. If yes, connect the external video equipment. If there is any video signal, it can be judged that the display panel or kinescope in the machine has fault; if there is no video signal, it can be judged that the mainboard has fault. If the user does not have the external video equipment, send the machine back to the manufacturer for repair.

Q: The type-B ultrasonic probe sound window film is broken and has oil leakage.

A: Send the type-B ultrasonic probe back to the manufacturer for repair, replace the sound window film, and fill oil and seal glue again (in case of user demand, the backup probe can be provided). 

Q: After startup, the type-B ultrasonic images are twisting and distorted, but the type-A ultrasonic images are normal. After work for a while, the images restore to normal status.
A: Inquire the user about the indoor temperature of the type-A ultrasonic or type-B ultrasonic located room during the night or shutdown status. If the indoor temperature is lower than 10, it is a normal phenomenon. Explain the reason to the user. Since the transducer of the type-B ultrasonic probe works under the oil bath statuswhen the room temperature is lower than 10, the oil will solidify, and the transducer cannot swing normally, thus the twisting and distortion of type-B ultrasonic images occur. When such phenomenon occurs, you can start up the machine, and let the type-B ultrasonic probe swing under the startup status for about 3 minutes! (Notesuch phenomenon often occurs in the autumn and winter seasons of southern regions)

Q: The type-B ultrasonic images have continuous twisting and distortion, but the type-A ultrasonic images are normal.

A: Firstly connect the backup type-B ultrasonic probe. If it is normal, the problem should be the probe fault. If the images are still twisting, examine the on/off status of all connecting wires of the type-B ultrasonic probe socket by use of a multimeter. If all connecting wires of the socket are normal, firstly replace the mainboard.

Q: During measurement, the type-A ultrasonic images do not have waveform, but the type-B ultrasonic images are normal.

A: Firstly connect the backup type-A ultrasonic probe. If it is normal, the problem should be the probe fault; if it is still abnormal, examine the connecting wires of the type-A ultrasonic probe socket. If the connecting wires are normal, replace the mainboard. 

Q: All keys of the keyboard are normal, but the foot switch fails.

A: Replace the foot switch. 

Q: There are interference of different shapes in the type-B ultrasonic fan zone, but other functions are normal.

A: Such phenomenon should be solved by different methods according to different environment. Firstly eliminate the fault of the machine itself, then examine the machine installation environment to check whether there are strong interference sources such as microwave, signal base station and dental drill in surrounding areas, and examine whether the machine and network power supply grounding is firm. The feasible methods include elimination of surrounding interference sources, reliable grounding for machine or replacement of installation environment.



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