Brother SB7900E - Page 7

iv
Y carriage unit removal ...................................................................................................................2 - 62
Y carriage ASSY disassembly .........................................................................................................2 - 63
Y pulse motor assembly removal .....................................................................................................2 - 63
Y tension pulley assembly removal .................................................................................................2 - 64
Y tension pulley ASSY disassembly ...............................................................................................2 - 64
Y driving gear pulley assembly removal .........................................................................................2 - 65
Y sensor PCB assembly removal .....................................................................................................2 - 65
3. Assembly .............................................................................................3 - 1
Needle bar, presser mechanism / upper shaft mechanism ...............................3 - 2
Plate spring attachment ......................................................................................................................3 - 3
Needle-presser module attachment ....................................................................................................3 - 4
Upper shaft pulley attachment ...........................................................................................................3 - 4
Pulley attachment ...............................................................................................................................3 - 5
Upper shaft assy. attachment .............................................................................................................3 - 5
Connecting the needle-presser module and upper shaft ....................................................................3 - 6
Tension pulley assembly attachment .................................................................................................3 - 6
Rotary hook drive mechanism / Feed and bobbin mechanism /Cutter assy. mechanism ......3 - 7
Assembling the Lower shaft A assembly ..........................................................................................3 - 8
Timing pulley D attachment ..............................................................................................................3 - 8
Joint attachment .................................................................................................................................3 - 8
Lower shaft A attachment ..................................................................................................................3 - 9
feed module attachment .....................................................................................................................3 - 9
Thread cutter module attachment ....................................................................................................3 - 10
Coating clip attachment ..................................................................................................................3 - 10
Bobbin winder mechanism ...............................................................................3 - 11
Bobbin winder shaft stopper (bobbin winder assembly holder) assembly ......................................3 - 12
BW shaft holder assembly attachment .............................................................................................3 - 12
BW-F SW assy. attachment .............................................................................................................3 - 12
BW holder supporter attachment .....................................................................................................3 - 13
Bobbin winder holder assembly attachment ....................................................................................3 - 13
Bobbin presser assembly .................................................................................................................3 - 13
Bobbin winder cover attachment .....................................................................................................3 - 14
Bobbin base assembly ......................................................................................................................3 - 14
Bobbin base attachment ...................................................................................................................3 - 14
Thread tension mechanism .............................................................................3 - 15
Spring tape attachment .....................................................................................................................3 - 16
Thread guide wire attachment ..........................................................................................................3 - 16
Thread take up spring attachment ....................................................................................................3 - 17
Tension disk attachment ..................................................................................................................3 - 18
AT pulse motor attachment ..............................................................................................................3 - 18
Thread tension gear attachment .......................................................................................................3 - 19
Thread guide attachment ..................................................................................................................3 - 19
Plate assembly attachment ...............................................................................................................3 - 19
Tension releaser link attachment .....................................................................................................3 - 20
Thread guide shutter assembly ........................................................................................................3 - 20
PF-F SW assy. assembly ..................................................................................................................3 - 20
Thread release holder assy. attachment ...........................................................................................3 - 21
Upper thread PCB unit assembly ....................................................................................................3 - 21
Upper thread PCB unit attachment ..................................................................................................3 - 21
Tension plate attachment .................................................................................................................3 - 22
Thread guide cover attachment ........................................................................................................3 - 22
Thread guide cover assembly ..........................................................................................................3 - 23