116 Service Manual
10 System Troubleshooting
!
●
Potentially hazardous voltage exists inside the ultrasound system. Remove personal
jewelry that contains metallic substances when you operate the system.
●
Do not disassembly or remove any circuit boards when the ultrasound system is
powered on.
10.1 Diagnostic Preparation
All precautions in this manual should be thoroughly read before you attempt to service the system.
Identify whether the system malfunction is caused by incorrect operations or system hardware/
software failures to make a fault diagnostics.
Propose all possible factors, including system running time and external interferences, that affect
system functions.
Identify whether the system malfunction is a common fault. Fault caused by power supply socket,
(extension) power cord or fuse can be attributed to a common fault.
If the system malfunction is identified as a unusual fault, you can make the fault recurrence in a
similar test environment.
You can identify the system malfunction and solve it with your knowledge, experience or a
reference to Section 10.3 and Chapter 3.
Consider the service cost. Do not replace a component if you are unsure if it is the cause.
Avoid introducing extra factors that might interrupt the test or cause another problem. If certain
component is identified to be the fault cause, you should replace it only, but not replace the whole
circuit board that holds it. For example, a faulty capacitor is identified to be fault cause, you
should replace it only, but not the PCB board that holds it.
Only the fault cause is identified, you should solve it and perform necessary tests described in
Chapter 8 to ensure the system performance.
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