SV0380
BROKEN LED(EXT)
Fanuc · Alpha i Series Servo Amplifier
What does SV0380 mean?
A separate detector error was reported, indicating a broken LED. This suggests an optical component failure within the external detector.
Common Causes
- External detector's LED illumination is insufficient or has failed.
- Obstruction on the external detector's optical sensor.
- Malfunction of the external detector's optical sensor component.
- Signal conditioning circuitry for the external detector failure.
- Incorrect alignment of the external detector with the target.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Verify external detector LED output using its diagnostic indicator.
- 2
Clean the external detector's sensor lens and target surface.
- 3
Inspect the external detector's optical sensor for physical damage.
- 4
Measure signal output from the external detector.
- 5
Adjust external detector mounting to ensure proper alignment.
Verified technical data. Last updated: March 2026
Related Faults
Source: Fanuc Alpha i Series Servo Amplifier