Brother DB2-DD7100, Service Manual

Page: 7 / 153

SL-710A
7. ADJUSTMENTS
..............................................63
7-1. Adjusting the thread tension spring .............63
7-2. Adjusting arm thread guide R ......................64
7-3. Adjusting the presser foot height .................64
7-4. Adjusting of the feed dog height ..................65
7-5. Adjusting the feed dog angle .......................66
7-6. Adjusting the needle bar height ...................67
7-7. Adjusting the needle and
feed mechanism timing ...............................67
7-8. Adjusting the needle and rotary
hook timing ..................................................68
7-9. Quick reverse mechanism ...........................69
7-10.Matching stitch lengths for normal
feed and reverse feed..................................69
7-11.Synchronizer Adjustment ............................70
7-12.Adjusting the tension release wire...............71
7-13.Adjusting the treadle....................................72
7-14.Adjusting the rotary hook lubrication amount.......73
8. CONTROL SYSTEM
....................................75
9. REMOVING AND INSTALLING
THE CONTROL BOX
...................................76
10. CONTROL BOX AND
MOTOR RATING PLATE
...........................77
11. CONTROL CIRCUIT BOARD
...................79
12. FUNCTION SETTING METHODS
..........81
12-1.DIP switch functions ....................................81
12-2.Parameter setting flowchart.........................82
12-3.Parameters ..................................................83
12-4.Memory switch setting flowchart .................86
12-5.Memory switches.........................................87
13. TREADLE UNIT ASSEMBLY
...................90
13-1.Types...........................................................90
13-2.Standard setting values ...............................91
13-3.Setting method for standard
depression strokes ......................................92
14. STANDING OPERATION PEDAL
...........96
14-1.Installing the foot plug..................................96
14-2.Connectors ..................................................97
15. Puller
(commercially available)
..........................98
15-1.Timing..........................................................98
15-2.Connector ....................................................98
15-3.Binding the cord...........................................98
16. AUTO BOBBIN CHANGER
......................99
16-1.Timing..........................................................99
16-2.Connector ....................................................99
16-3.Binding the cord...........................................99
17. SPEED SETTING METHODS
............... 100
17-1.Types of speed settings............................ 100
17-2.Setting method.......................................... 100
17-3.Checking the speed settings..................... 101
18. CLEARING THE MEMORY DATA
....... 102
19. CHECKING THE MOTOR AND
POWER SUPPLY
...................................... 103
20. CHECKING THE SOLENOIDS
............. 104
21. WIRING DIAGRAMS
................................ 105
21-1.Control circuit board assembly ................. 105
21-2.Power supply circuit board assembly
(DD7100A, 710A) ..................................... 111
21-3.Power supply circuit board assembly
(DD7100) .................................................. 120
21-4.Transformer .............................................. 129
21-5.Operation panel B-40................................ 130
21-6.Operation panel B-100.............................. 133
22. TROUBLESHOOTING
............................. 136
22-1.Sewing ...................................................... 136
22-2.Error code displays ................................... 143