Revision:1.0(2023-01-12)
392
5. After eliminating the above factors, replace the probe board. For details, refer to 7.9.2
Disassembly and Assembly.
88..33..44..33 There is noise on the B or C image.
Fault Description
There is noise on the B or C image.
Involved FRU
Probe and main board
Severity
Suspension
Handling Level
Contact the device provider for onsite handling.
Possible Cause
1. The fault is caused by electromagnetic interference introduced by the power grid, or radiated
interference introduced by space.
2. The probe is faulty.
3. The transmitting and receiving circuit on the frontend is faulty.
Resolve Path
1. Identify electromagnetic interference sources. Common sources of interference include
fluorescent lamps, chargers, computer cases, and low-quality UPS power supplies. Identify the
interference sources by powering off peripheral electrical equipment connected to the grid.
2. Move the device to other floors or buildings that are out of the original environment, and check
whether interference disappears.
3. Supply power for the device separately.
4. Connect to the filter and check whether interference disappears.
5. Use a new probe to conduct a cross test. If the fault does not appear on the new probe, the
probe itself is faulty.
6. After the above factors are eliminated, the main board is faulty.
Solution
1. Identify electromagnetic interference sources (largest possibility).
Diagnostic Ultrasound System
Service Manual
8 Troubleshooting
To Next Page
Loading...
Need help?
General
