Brother BAS-761 Service Manual download pdf (Page 8)

6. ELECTRIC COMPONENTS.....................................................................................................6-01

6-1. Precautions at the time of adjustment......................................................................................................6-01

6-2. Components inside the control box and the operation panel...................................................................6-01

6-3. Power supply............................................................................................................................................6-03

6-3-1. Fuse ..................................................................................................................................................6-03

6-3-2. Circuit protector of bobbin winder motor ...........................................................................................6-04

6-3-3. Breaker of suction (vacuum) device..................................................................................................6-04

6-3-4. Conversion of power supply voltage .................................................................................................6-05

6-4. PROM.......................................................................................................................................................6-06

6-5. Connector.................................................................................................................................................6-07

6-5-1. Main PCB ..........................................................................................................................................6-07

6-5-2. Power supply PCB ............................................................................................................................6-17

6-5-3. Operation panel PCB ........................................................................................................................6-18

6-5-4. Programmer PCB..............................................................................................................................6-20

6-5-5. Pattern sensor PCB ..........................................................................................................................6-21

6-6. Sensor ......................................................................................................................................................6-22

6-6-1. Sensor location..................................................................................................................................6-22

6-6-2. Function of sensor.............................................................................................................................6-23

6-7. Harness ....................................................................................................................................................6-29

6-7-1. Harness connecting table..................................................................................................................6-29

6-7-2. Harness connecting pin number table ..............................................................................................6-31

6-8. Servo amplifier..........................................................................................................................................6-41

6-8-1. Names of major parts........................................................................................................................6-41

6-8-2. Abnormalities and a measure ...........................................................................................................6-43

6-8-3. Exchange the servo amplifier............................................................................................................6-44

6-9. DIP switches.............................................................................................................................................6-45

6-10. Error code ...............................................................................................................................................6-47

6-11. Exchange of PCB....................................................................................................................................6-51

6-11-1.Main PCB ..........................................................................................................................................6-51

6-11-2.Panel PCB.........................................................................................................................................6-51

6-12. Control circuit block diagram ..................................................................................................................6-53

7. FOLDING MACHINE....................................................................................................................7-01

7-1. Basic adjustments for delivery..................................................................................................................7-01

7-2. Valve.........................................................................................................................................................7-03

7-3. Operation order and connection of folding machine ................................................................................7-04

7-4. Adjustment................................................................................................................................................7-06

7-4-1. Fine adjustments...............................................................................................................................7-06

7-4-2. Characteristic troubles of three corner pocket model .......................................................................7-07

7-4-3. Characteristic troubles of two corner pocket model..........................................................................7-39