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Service Manual
10 System Troubleshooting
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USB2.0 Cable
The ultrasound unit is connected to the main board through USB2.0 port on the VBF board.
Ensure USB2.0 cable is connected well, or else system crash or auto shutdown may result.
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Power Supply
All the power consumed by the ultrasound unit is transferred through P3 and P4 (or P1
and P2 on some models), the current flowing through power supply socket is rather large.
Failure connection of power supply may result in great resistance, low voltage inputted to
components, overheat socket, or even system damage. Ensure P3 and P4 (or P1 and P2 on
some models) are in good contacts, hold the plug not the cable when unplug the power supply
socket.
10.3.4.2 Maintenance Items
Start up or shut down the ultrasound system for several times to ensure no malfunction occurs.
Clean the ultrasound system if it has been used for a long period. For details, refer to Chapter 11.
Record or solve problems proposed by the user.
Make a detailed service record for future maintenance or service. The fault cause, replaced parts
and their corresponding part numbers, repairing procedures should be detailed in this record.
Moreover, a signature from the hospital on this record is required.
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