Revision:1.0(2023-01-12)
391
1. Replace the probe.
2. Replace the main board. For details, refer to 7.13.2
Disassembly and Assembly.
88..33..44..22 Dark or bright strips exist on the B image
Fault Description
Dark or bright strips exist on the B image
Involved FRU
Probe, probe board, and main board
Severity
Suspension
Handling Level
Contact the device provider for onsite handling.
Possible Cause
1. The LGC parameter is not properly adjusted.
2. The probe is faulty. For example, the array is damaged.
3. The probe board is faulty (extremely low possibility).
4. The main board is faulty.
Resolve Path
1. Access LGC from the LGC key position on the second screen of the soft menu on the touch
screen, and check whether dark strips or bright strips of images appear due to the low LGC
value of a segment.
2. Test other probes. If the fault occurs only on one probe, the probe itself is faulty.
3. After the above factors are eliminated, the probe board (extremely low possibility) or main
board may be faulty.
Solution
1. Re-adjust the LGC parameter.
2. Clean the probe socket and connect and test the probe again.
3. Test other probes. If the fault only appears on a certain probe, replace the probe.
4. If the probe failure is eliminated but the fault persists, replace the main board. For details, refer
to 7.13.2
Disassembly and Assembly.
Diagnostic Ultrasound System
Service Manual
8 Troubleshooting
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