10
Printed circuit board A connection
Replacing Electronic Components
Printed circuit board A
NOTE:
Do not disconnect the connectors by pulling on cord.
To disconnect the connectors, grasp the connector, not
the cord.
To remove:
1. Remove the front cover.
2. Grasp the connector directly with your fingers and pull.
Do not pull the lead wire, as this may damage the
contact sleeve inside the connector.
Remove the setscrews and printed circuit board A.
To attach:
1. Follow the above procedure in reverse.
Be sure that the connector post on the printed circuit
board to which it is connected.
Position the connector correctly, then push it straight
down until it locks in place.
Setscrew
Setscrew
q
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!0
!1
!2
!3
!4
!6
!5
!7
!8
!9
@0
@8
@7
@6
@5
@4
@3
@2
@1
Bobbin winder switch
LCD
Touch panel
Program (Slave)
Printed circuit board L1*
Printed circuit board L2
Printed circuit board L3 (red)
Slide volume
Printed circuit board F
Presser foot lifter sensor*
BH sensor*
Upper thread sensor*
Knee lifter sensor
Power switch
Thread cutter motor
Remaining bobbin thread detecting sensor
Feed motor
Remaining bobbin thread detecting motor (green)
Needle plate detecting sensor
Drop feed detecting sensor (brown)
DC motor
Presser foot lifter motor
Thread tension motor
Zigzag motor
USB
Foot control & Thread cutter switch jack
Phase sensor
Program (Slave)
q
w
e
r
t
y
u
i
o
!0
!1
!2
!3
!4
!5
!6
!7
!8
!9
@0
@1
@2
@3
@4
@5
@6
@7
@8
