S6 Portable Digital Color Doppler Ultrasound System
Service Manual
interrupt the test or cause another problem. If a certain component
has been identified to be the cause of a problem, replace it but not the
whole circuit board that holds it. For example, a faulty capacitor has
been identified as causing a system malfunction. Replace this capac-
itor, but not the PCB board that holds it. However, double check this
PCB board after replacing: sometimes the problem might be caused
by more than one faulty IC.
8. After repairing the equipment, perform the necessary tests to ensure
that the system will operate with optimal performance.
Warnings and Precautions
Before servicing, review all the warnings and cautions in the previous chap-
ters.
Warning!
• Potential hazardous voltage exists inside the system! Remove
any personal jewelry that contain metallic substances.
• DONOT remove or replace any circuit boards while the system is
powered on. => Danger of personal injury and system damage!
10.3 Functional Check
10.3.1 Basic Functional Tests
The basic functional tests with the expected results are described below.
1. Connect a probe, take L743 for example, to the S6 system.
2. The supported diagnostic modes illustrated as large icons are dis-
played on the screen. Choose a diagnostic mode to start the real time
scanning.
3. Enter color mode by pressing CFM key, an area of interest is shown
on the screen. Adjust the D Gain from minimum to maximum, en-
sure that the color flow is always randomly distributed. The color
flow should cover the whole area of interest as the D Gain is set to
maximum.
4. Press the FREEZE key to enter the freeze mode. Ensure that all dis-
played data are correct by checking the cine replay.
P/N: 4720-0034-01A
10-2
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