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[5] PRINTED CIRCUIT BOARD DIAGRAM (CONNECTOR LAYOUT)
(Caution) 1. CN Nos. in frame of MAIN circuit board denote connector Nos. in MAIN circuit board.
2. Portions enclosed with thick frame denote circuit boards.
3. Numerals outside of frame of MAIN circuit board denote number of lead wires.
Note : Convex portion of connectors, CN1, CN2 and CN3 should be placed up.
Controller
External thread
trimmer socket
External thread
trimmer
(Pedal SW)
Controller
socket
Bobbin winder SW
Thread trimmer
solenoid
Lamp SW
Power transformer
(AC12V)
Power SW
Main motor
MP detection
circuit board
MAIN circuit
board
Lamp
CN11
Thread
trimmer SW
circuit board
AC120V
Plug socket
3
3
2
3
3
22
2
2
2
2
CN8
CN7
CN1
5.6.7
CN5
CN6
CN4
CN2
CN1
3.4
CN1
1.2
CN3
Description MAIN circuit board Cord
Terminal Pin color
MP detection circuit CN6 1 Red
board 2 Brown
3 Black
Thread trimmer CN1 3 Gray
solenoid 4 Orange
Power input CN2 1 Yellow
2 Blue
Controller socket CN8 1 Yellow
2 White
Lamp CN4 1 White
2
Transformer CN1 1 Blue
Primary side (AC120V)
2 White
Secondary side CN3 1 Yellow
(AC12V) 2 Yellow
Description MAIN circuit board Cord
Terminal Pin color
Thread trimmer CN7 1 Orange
SW circuit board 2 Black
3 Brown
Bobbin winder SW CN5 1 Gray
2 Black
3 Purple
Motor CN1 5 Gray
6 Red
7 Black
Description Thread trimmer SW circuit board Cord
Terminal Pin color
Pedal SW CN11 1 Brown
2 Black
CN1 CN2 CN4 CN3
CN5
CN6
CN7
CN8
Connector insertion diagram
Convex portion