Brother BAS-326 Service Manual Page 81
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BAS-311E.311EL.326E.326EL
Chapter 6 Power supply and electrical parts adjustment
Chapter 6 Power supply and electrical parts
adjustment
1. Precautions at the time of adjustment
Pay attention to the following when opening the control box for maintenance.
■ Electric shock
Some large capacitors may have a high voltage remaining in them for up to 5 minutes after the power is turned off. To
prevent electric shock, wait at least 5 minutes after the power is turned off before doing the following:
• Opening and closing the control box
• Replacing fuses
• Separating and joining connectors
• measuring resistance
• Doing anything with a possibility of touching something inside the control box
Some adjustments require measuring the voltage while the power is turned on with the control box kept open.
In such a case, be careful not to touch any place other than that for the measurement. In addition, always keep in mind
that a high voltage remains for 5 minutes after the power is turned off.
■ Injury
While the power is turned on, the cooling fan of the control box operates; be careful not to get caught in it.
When separating or rejoining connectors, and measuring something, be careful not to cut your fingers on metal parts
such as heatsinks and covers.
2. Components inside the control box
The following are brief explanations of components inside the control box. See control circuit block diagram at the end of
this manual for the details of the connections.
■ Main PCB
The main PCB is fixed to the rear panel of the control box. This PCB serves to control machine operation.
■ Power supply circuit board
The power supply circuit board is fixed at the bottom of the control box. Four fuses are mounted on this PCB.
■ Panel circuit board
The panel circuit board is fixed to the front panel of the control box. This PCB controls indications of the machine status
and the input operation.
■ DC fan motor
The DC fan motor serves as a fan to cool the inside of the control box. Clean the inlet filter monthly.
■ Conversion transformer (depending on power supply voltage specification)
The conversion transformer controls the power supply voltage to provide 220 V.
Operation panel Control box
Panel circuit board
Conversion transformer
Inlee fileer
Power supply
circuit board
DC fan
Main PCB
3.5 FDD
- BAS-311E,311EL 1
- BAS-326E,326EL 1
- SAFETY INSTRUCTIONS 2
- Installation 3
- Cleaning 4
- Maintenance and inspection 4
- Eye guard, Belt cover 5
- Finger guard, etc 5
- Explanation of models 6
- BAS-311E.311EL.326E.326EL 10
- (Pneumatictype) 11
- B311 u left and right 12
- 4. Presser foot mechanism (1) 14
- Presser foot mechanism (2) 15
- 5. Thread trimmer mechanism 16
- Chapter 2. Disassembly 19
- Covers (2) 311EL 20
- Covers (3) 326E, 326EL 20
- 2. Feed mechanism 21
- 3. Presser foot mechanism 22
- 4. Needle bar mechanism 23
- 5. Upper shaft mechanism 24
- 5. Raise the machine head 25
- Feed mechanism (Y axis) (2) 26
- 8. Lower shaft mechanism 30
- 10. Thread nipper mechanism 32
- 11. Thread trimmer mechanism 33
- Chapter 3. Assembly 34
- 2. Thread nipper mechanism 35
- Parallel 44
- Feed mechanism (Y axis) 326E 45
- 6. Upper shaft mechanism 47
- 7. Needle bar mechanism 48
- 8. Presser foot mechanism 49
- 0.5 - 1mm 50
- 9. Lower shaft mechanism (1) 51
- 0.01 - 0.08mm 52
- ADP × 17 52
- 311E, 311EL, and 326E 54
- 0.1 - 0.5mm 55
- H - position 55
- (X=0, Y=0) 55
- 311E and 311EL 56
- 326E and 326EL 56
- 13. Covers 311E 57
- 326E · 326EL 58
- Chapter 4. Adjustments 59
- 6-1. Solenoid type 61
- 6-2. Pneumatic type 62
- Index mark 63
- 8-1. Presser foot adjustment 67
- 10. Wiper adjustment 68
- ■ (X axis) 69
- ■ (Y axis) 311E and 311EL 70
- ■ (Y axis) 326E, 326EL 71
- 9.8N(1kgf) 72
- 311EL and 326E, 326EL 73
- 13. Adjusting backlashes 74
- Most 0.15 mm 75
- Material 77
- Feed plate in operation 77
- Feed plate not in operation 77
- Cassette presser 80
- 3. Fuse explanation 82
- 4. Connectors 83
- Power supply circuit board 84
- Outside of the panel 84
- Panel circuit board 84
- ■ Contact failure 86
- 1. Feed mechanism 86
- 3. Sewing operation 87
- 4. Programmer operation 88
- 5. Others 88
- • Error [E.40] appears 89
- • Error [E.12] appears 89
- 5. DIP switches 90
- DIP switch B 91
- ■ DIP switch C 92
- ■ DIP switch D 93
- ■ Memory Switches (00 – 0F) 95
- ■ Memory Switches (20 – 2F) 95
- ■ Memory Switches (10 – 1F) 96
- 12345678 12345678 98
- 8. Checking the input voltage 99
- BAS-300E series 100
- 11. Error codes 101
- Chapter 7. Trouble shooting 103
- Chapter 7 104
- Precautions 109
- Before adjustment 109
- Presser foot 116
- Work clamp 116
- P6 (YPM) or P7 (XPM) 116
- Chapter 8 120
- Chapter 9. Gauge parts list 121
- OPTION PARTS 122
- ■ Feed mechanism (BAS-326E) 126
- Chapter 10. Option parts 131
- ■ Programmer 132
- ■ Play prevention work clamp 143
- ■ For Horizontal Wiper 143
- ■ 2-step tension device 145
- ■ Auxiliary device 146
- Control Block Diagram 148
- SERVICE MANUAL 150
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