Revision:1.0(2023-01-12)
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2. If the test result is FAIL, check whether the cable and conversion board connections between
the main display and the main unit are reliable. If the fault persists, replace the main display.
Z0902 Main Display Serial Number Test
• Upper-level test item
Main display I2C communication test
• Test Items
The system reads the serial number of the current display during the test and compares it to
the serial number in the configuration file.
• Test failure analysis
If the test result is NaN, the current display does not support this test.
If the test result is FAIL, the read serial number of the current display is inconsistent with that in
the configuration file.
• Troubleshooting suggestion
1. If the test result is NaN, deselect the test item.
2. If the test result is FAIL, turn off the device and restart the Doppler system. If the test result is
still FAIL, check whether the cable and conversion board connections between the main
display and the main unit are reliable. If the fault persists, replace the main display.
Z0903 Main Display Configuration Test
• Upper-level test item
Main display serial number test
• Test Items
The system reads the parameter board checksum of the current display during the test and
compares it to the checksum in the configuration file read by the Doppler system.
• Test failure analysis
If the test result is FAIL, the read checksum of the current display is inconsistent with that in
the configuration file.
• Troubleshooting suggestion
If the test result is FAIL, turn off the device and restart the Doppler system. If the test result is
still FAIL, check whether the cable and conversion board connections between the main
display and the main unit are reliable. If the fault persists, replace the main display.
Z0904 Bright Control Test for the Main Display
• Upper-level test item
Main display I2C communication test
• Test Items
The following dialog box appears during the test. The program controls the brightness
changes of the main display through the I2C bus. Change the brightness to the lowest, then
Diagnostic Ultrasound System
Service Manual
9 Appendix
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