Brother BAS-761 Service Manual Page 103
- Page / 179
- Table of contents
- BOOKMARKS
Rated. / 5. Based on customer reviews
6. ELECTRIC COMPONENTS
BAS-7610
6-29
6-7. Harness
Refer to “6-12. Control circuit block diagram” together.
6-7-1. Harness connecting table
Harness Connection S
y
m
p
tom of
p
oor contact or disconnect
1 Power supply harness A Outlet Breaker
2 Breaker NF1 harness Breaker Noise filter PCB
3 NF1-T1 harness Noise filter PCB Transformer 1
A sewing machine is not turned on.
(
A o
p
eratin
g
p
anel does not
display.
LED of servo am
p
lifier does not
display.
A light marker does not light up.)
Transformer 2
4 T1-T2 harness Transformer 1
Switching power
supply CN1
A o
p
eratin
g
p
anel does not
display.
A light marker does not light up.
5 T2-P PCB harness Transformer 2
Power supply PCB
P4
A light marker does not light up.
Solenoid valve does not o
p
erate.
Pulse motor for stacker roller
does not rotate.
6 T1-NF2 harness Transformer 1 Noise filter
LED of servo am
p
lifier does not
display.
Switchin
g
p
ower su
pp
l
y
CN2
7 Main
p
ower su
pp
l
y
harness
Power supply PCB P1
Main PCB P4
A o
p
eratin
g
p
anel does not
display.
8 Servo power harness X Noise filter
X axis servo
amplifier
X axis servo am
p
lifier does not
display.
Power ON --- “E-870”
9 Servo power harness Y Noise filter
Y axis servo
amplifier
Y axis servo am
p
lifier does not
display.
Power ON --- “E-880”
10 Servo power harness Z Noise filter
Z axis servo
amplifier
Z (machine) axis servo amplifier
does not display.
Power ON --- “E-890”
11 Bobbin winder harness Power supply PCB P2
Bobbin windin
g
motor
Bobbin windin
g
motor does not
rotate.
12 Maker harness Power supply PCB P3 Light marker Light marker does not light.
13 T1 protector harness Transformer 1 Circuit protector
14 Protector motor harness Circuit protector Blower motor
Motor for vacuum does not rotate.
15 Motor power harness X
X axis servo amplifier
UVW
X axis servo motor
Sewing clamp does not operate.
Panel --- “E-870”
Servo AMP. --- “AL.52”
16 Motor power harness Y
Y axis servo am
p
lifier
UVW
Y axis servo motor
Machine head does not move.
Panel --- “E-880”
Servo AMP. --- “AL.52”
17 Motor power harness Z
Z axis servo amplifier
UVW
Z axis servo motor
Machine motor does not rotate.
Panel --- “E-870”
Servo AMP. --- “AL.52”
18 Encoder harness X
X axis servo amplifier
CN2
X axis servo motor
Sewing clamp does not operate.
Panel --- “E-870”
Servo AMP. --- “AL.16”
19 Encoder harness Y
Y axis servo am
p
lifier
CN2
Y axis servo motor
Machine head does not move.
Panel --- “E-880”
Servo AMP. --- “AL.16”
20 Encoder harness Z
Z axis servo amplifier
CN2
Z axis servo motor
Machine motor does not rotate.
Panel --- “E-890”
Servo AMP. --- “AL.16”
21 Servo harness X Main PCB P13
X axis servo
am
p
lifier CN1A, 1B
Sewing clamp does not operate.
Panel --- “E-870”
Servo AMP. --- “AL.E6”
22 Servo harness Y Main PCB P12
Y axis servo
am
p
lifier CN1A, 1B
Machine head does not move.
Panel --- “E-880”
Servo AMP. --- “AL.E6”
23 Servo harness Z Main PCB P11
Z axis servo
am
p
lifier CN1A, 1B
Machine motor does not rotate.
Panel --- “E-890”
Servo AMP. --- “AL.E6”
24 FDD power harness Main PCB P8 Floppy disk drive
A flo
ppy
disk cannot be
accessed.
Panel --- “E-700”, ”E-701”
- SAFETY INSTRUCTIONS 2
- CAUTION 3
- 3. Warning labels 5
- 1-3. Needle zigzag mechanism 10
- 1-4. Lubrication mechanism 12
- 1-5. Thread trimmer 14
- 1-6. Presser bar lifter 16
- 1-7. Stacker 16
- 1-8. Feed guide mechanism 17
- 1-9. Folding mechanism 18
- 1. MECHANICAL DESCRIPTIONS 19
- 1-11. Bobbin winder mechanism 20
- 2-1. Basic operation 21
- <Starting> 22
- <Removing stacker> 23
- <Removing folding base> 24
- 3. DISASSEMBLY 25
- 3-2. Presser foot mechanism 26
- 3-5. Needle bar 28
- 3-6. Motor 29
- 3-7. Timing belt 29
- 3-8. Auxiliary shaft 30
- 3-9. Zigzag 31
- 4. ASSEMBLY 33
- 4-2. Auxiliary shaft 34
- 4-3. Timing belt 34
- 4-4. Motor 35
- 4-5. Needle bar 36
- 4-8. Presser foot mechanism 38
- 4-9. Cover 39
- 5. ADJUSTMENT 41
- X2.4 rotary hook : 2.4 mm 46
- X1.7 rotary hook : 1.8 mm 46
- X2.4 rotary hook : 1.2 mm 46
- 5-4. Tension release 49
- 5-5. Thread tension 49
- <Thread guide, R> 50
- <Fixed knife> 51
- <Needle> 51
- 5-11-1. Folding clamp 56
- 5-11-2. Inner clamp 56
- 5-11-3. Center blade 56
- 5-11-4. Sewing clamp 57
- 5-11-9. Stacker wiper 59
- 5-11-10.Stacker bar inside 59
- 5-11-11. Stacker bar outside 59
- 5-11-12. Stacker roller 60
- 5-30-2. Setting of MODE 73
- <Operation panel> 76
- <Programmer> 76
- 6-3. Power supply 77
- 6-4. PROM 80
- 6-5. Connector 81
- P3 [TRIM] (MOLEX 5273-02A) 82
- P4 [POWER] (MOLEX 5566-10A) 82
- P7 [FDD] (3 M 3431-6002SCFL) 84
- P23 [CLAMP] (MOLEX 5045-03A) 88
- 6-5-2. Power supply PCB 91
- P1 [MAIN] (MOLEX 5277- 04A) 91
- P4 [AC-IN] (MOLEX 5277 - 06A) 91
- 6-5-3. Operation panel PCB 92
- 6-5-4. Programmer PCB 94
- P2 [MAIN] (MOLEX 5268-12A) 94
- 6-5-5. Pattern sensor PCB 95
- 6-6. Sensor 96
- 6-6-2. Function of sensor 97
- < Jig pattern sensor > 99
- < Cylinder sensor > 100
- < Clamp-in sensor > 101
- BAS-7610 102
- 6-7. Harness 103
- 6-8. Servo amplifier 115
- < Servo motor > 116
- 6-9. DIP switches 119
- 6-10. Error code 121
- 6-11. Exchange of PCB 125
- 6.ELECTRIC COMPONENTS 126
- 6. ELECTRIC COMPONENTS 127
- 7. FOLDING MACHINE 131
- 7-2. Valve 133
- 7-4. Adjustment 136
- Tucking blade R-3J 138
- Tucking blade L-3J 138
- Tucking blade LD-3J 138
- Tucking blade RD-3J 138
- D. Program defect 139
- C. Program defect 140
- B. Program defect 142
- E. Program defect 148
- D. Program defect 149
- A. The flap margin is small 153
- A. The flap margin is small 156
- A. The flap margin is large 157
- 21. The pocket top is narrow 162
- 22. The seam margin is large 163
- <Cause> 168
- Tucking blade D 172
- Tucking blade RDD or LDD 172
- 1 - 2 mm 172
- Tucking blade RD 172
- 4. The base is curved 173
- 8. The corners are round 177
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