Baby Lock BLDY Service Manual page 26

Outline of Mechanism Operation of other electronic components
Presser switch. . . . . . . . . . . . . . . . . . . . . . . . This switch detects the vertical position of the presser foot lifter.
BW (bobbin winder) switch . . . . . . . . . . . . . This switch detects whether the bobbin is set for winding or not,
Needle plate switch . . . . . . . . . . . . . . . . . . . This switch detects normal needle plate or straight stitch needle
Foot controller jack . . . . . . . . . . . . . . . . . . . This is the jack for plugging in the foot controller in use.
LED lamp PCB assy. . . . . . . . . . . . . . . . . . . White LED lamps for illuminating the work space.
Up thread sensor PCB assy . . . . . . . . . . . . . Detects the presence or absence of the upper thread and whether
Initial sensor PCB assy. . . . . . . . . . . . . . . . . Detects the original position of each pulse motor.
Photo diode PCB assy,
photo transistor PCB assy . . . . . . . . . . . . . . This assy detects the bobbin thread is low.
Laser drive PCB assy . . . . . . . . . . . . . . . . . . This PCB assy irradiates line focused laser for the laser guide
UWR (ultrasonic wave receiving) PCB assy . . This PCB assy receives ultrasonic wave from the sensor pen.
UW (sensor) pen connector PCB assy . . . . . This PCB assy is for connecting the sensor pen to the machine.
Extension I/F PCB assy . . . . . . . . . . . . . . . . This PCB assy is for connecting extensions.
LED pointer drive PCB assy
(in embroidery foot "W+" with LED pointer). . This PCB assy creates point focused LED light for embroidery
DF (dual feed) PCB assy (in dual feed foot). . . This PCB assy controls pulse motor on dual feed and detects
UW (sensor) pen connector PCB assy
(in sensor pen) . . . . . . . . . . . . . . . . . . . . . . . This PCB assy sends ultrasonic wave to detect target position.
Camera module . . . . . . . . . . . . . . . . . . . . . . Read the fabric as image information to the machine.
Spool stand LED . . . . . . . . . . . . . . . . . . . . . Its lighting status and color indicate the machine status and
when the bobbin thread is wound.
plate.
it is cut or not.
line marker and detects initial position of the laser module pulse
motor.
pointer.
vertical motion of the dual feed.
thread color for embroidering.
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