SV0365
BROKEN LED(INT)
Fanuc · Alpha i Series Servo Amplifier
What does SV0365 mean?
The digital servo software detected abnormal data from the built-in Pulsecoder, specifically indicating a broken LED. This suggests an internal optical component failure within the Pulsecoder.
Common Causes
- Internal Pulsecoder's LED illumination is insufficient or has failed.
- Optical encoder wheel debris obstructing the LED sensor.
- Malfunction of the internal Pulsecoder's optical sensor component.
- Encoder signal conditioning circuitry fault.
- Incorrect mounting causing misalignment between LED and sensor.
Repair Steps & Checklist
Click steps to track your progress.
- 1
Verify internal Pulsecoder illumination using diagnostic screen.
- 2
Clean the encoder wheel and sensor area of any debris.
- 3
Inspect internal Pulsecoder sensor for visible damage.
- 4
Measure signal output from the internal Pulsecoder sensor.
- 5
Securely re-mount the internal Pulsecoder to ensure proper alignment.
Verified technical data. Last updated: March 2026
Related Faults
Source: Fanuc Alpha i Series Servo Amplifier