JUKI
LBH-1790 Series User Manual

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(11) Connection circuit diagram between control box and head
Needle rock origin Feed origin Presser lifter origin Needle thread trim origin Bobbin thread trim origin Knife origin Needle thread breakage Temporary stop Safety SW
MAIN p.c.b. A (asm.)
MAIN-INT cord A (asm.) MAIN-INT cord B (asm.) MAIN-INT cord D (asm.)
Feed motor Needle rock motor Presser lifter motor
Needle thread trim notor Bobbin thread trim motor
Thread tension solenoid
1
11
2
12
3
13
4
14
5
15
6
16
7
17
8
18
9 1
10 20
1
11
2
12
3
13
4
14
5
15
6
16
7
17
8
18
9 1
10 20
M2M_A M2M_B M2M_C M2M_D M2M_E M1M_A M1M_B M1M_C M1M_D M1M_E M3M_A M3M_B M3M_C M3M_D M3M_E
NC
Knife + Knife –
Knife return +
Knife return –
1
11
2
12
3
13
4
14
5
15
6
16
7
17
8
18
9 1
10 20
1
11
2
12
3
13
4
14
5
15
6
16
7
17
8
18
9 1
10 20
M2M_A M2M_B M2M_C M2M_D M2M_E M1M_A M1M_B M1M_C M1M_D M1M_E M3M_A M3M_B M3M_C M3M_D M3M_E NC Knife + Knife – Knife return + Knife return –
CN37 CN63
CN38 CN62
CN61CN42
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
1 2 3 4 5 6 7 8 9
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
+33V +33V +33V +33V
M4M_A1 M4M_A2 M4M_B1 M4M_B2 M5M_A1 M5M_A2 M5M_B1 M5M_B2
SOL ACT+
SOL ACT–
M1_ORG M2_ORG M3_ORG M4_ORG M5_ORG
MSDET
USDET PAUSE
SAFETY
SPR1 SPR2 SPR3
+24V
+5V
GND GND
+33V +33V +33V +33V M4M_A1 M4M_A2 M4M_B1 M4M_B2 M5M_A1 M5M_A2 M5M_B1 M5M_B2 SOL ACT+ SOL ACT– M1_ORG M2_ORG M3_ORG M4_ORG M5_ORG MSDET USDET PAUSE SAFETY SPR1 SPR2 SPR3 +24V +5V GND GND
1 2 3 4 5 6
1 2 3 4 5 6
1 2 3 4 5 6
1 2 3 4 5 6
+5V
EEP_CS (N)
SCK
DI
DO
GND
+5V EEP_CS (N) SCK DI DO GND

JUKI
LBH-1790 Series Specifications

General

Brand	JUKI
Model	LBH-1790 Series
Category	Sewing Machine
Language	English