Bernina B 570 - PCBA-Lower Thread Sensor Cpl

BERNINA International AG Seestrasse 161 CH-8266 Steckborn Schweiz Seite 53 von 172
DRAFT – VERSION
4.2.9 PCBA-Lower thread sensor cpl.
See ESD-related note
Disassembly:
• Open bobbin door.
• Press centre of lower-thread sensor a until sensor
comes off hook race cover holder c pin b (pict. 1).
• Remove PCBA-Lower-Thread-Sensor connector c
(pict. 2).
• Remove lower-thread sensor (see 3.1.4
).
Assembly:
• Reconnect PCBA-Lower-hread-sensor connector d
(pict. 2).
• Click lower-thread sensor a into place on hook race
cover holder c pin b (pict. 1).
• Insert guiding pin on the left of the lower-thread
sensor into guiding rail (red circle, pict. 1).
• Take care that wires are lain correctly (picts 3
and 4)
• Close bobbin door.