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Trouble Shooting
| Step | Cause | Solution | Parts |
| 1 | Ultrasonic receiver broad defective. | Replace the ultrasonic receiver broad SBA261. | Ultrasonic receiver broad (004-2997-9-SP) |
| 2 | Ultrasonic transmitter broad defective. | Replace the ultrasonic transmitter broad SBA294. | Ultrasonic transmitter board (005-3147-9-SP) |
| 3 | Main broad defective. | Replace the main board MBA872. | Main board AD8150 (004-3407-9-SP) AD8150N (004-3407A-9-SP) AD8150NP (004-3407B-9-SP) |
