Revision:1.0(2023-01-12)
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the highest, and finally normal. If you can perceive the changes, click Yes, I Can; otherwise,
click No, I Can't. Click Retry to repeat the preceding procedure.
• Test failure analysis
If the test result is Error, the drive is abnormal.
If the test result is FAIL, brightness control for the main display is abnormal.
• Troubleshooting suggestion
1. If the test result is Error, restart the device and re-perform the self-test. If the problem persists,
restore the device.
2. If the test result is FAIL, replace the main display. If the problem persists, replace the main
board.
Z0905 Backlight 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 turns off the backlight for 3
seconds and then resumes the backlight If you can perceive the changes, click Yes, I Can;
otherwise, click No, I Can't. Click Retry to repeat the preceding procedure.
• Test failure analysis
Diagnostic Ultrasound System
Service Manual
9 Appendix