Pcba-Lower-Thread Observer (Lto); Abc Sensor Support (Presser-Foot Recognition) - Bernina B 590 Service And Maintenance Manual

2.8 PCBA-Lower-Thread Observer (LTO)

2.9 ABC sensor support (presser-foot recognition)

The ABC sensors support contains:
•
Infrared (IR) LEDs
• Phototransistors
Connecting
• According to picture
Task
• Recognition of presser feet and
buttonhole foot signal via sensors.
2.10 PCBA Embroidery module detection (B 590, B 570 B 540 B 535)
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