Brother NV4000D Service Manual page 4

Knee lifter assembly removal ..........................................................................................................2 - 20
Embroidery unit connector assembly removal ................................................................................2 - 21
Main PCB assembly removal ..........................................................................................................2 - 21
NP PCB assembly (D6) removal .....................................................................................................2 - 21
NP PCB assembly (D6) disassembly ...............................................................................................2 - 21
Motor fan removal ...........................................................................................................................2 - 22
Main motor assembly removal ........................................................................................................2 - 22
Main motor assembly disassembly ..................................................................................................2 - 23
Thread tension unit ..........................................................................................2 - 24
Thread guide assembly removal ......................................................................................................2 - 25
Thread guide removal ......................................................................................................................2 - 25
Upper thread PCB assembly removal ..............................................................................................2 - 25
Upper thread PCB ASSY disassembly ............................................................................................2 - 25
AT INIT PCB assembly removal .....................................................................................................2 - 26
AT INIT PCB ASSY disassembly ..................................................................................................2 - 26
Thread guide base removal ..............................................................................................................2 - 26
Thread hook removal .......................................................................................................................2 - 26
Driving pulley removal ....................................................................................................................2 - 27
Belt guide removal ...........................................................................................................................2 - 27
TG pulse motor assembly removal ..................................................................................................2 - 28
TG pulse motor ASSY disassembly ................................................................................................2 - 28
AT pulse motor assembly removal ..................................................................................................2 - 29
Tension release holder assembly removal .......................................................................................2 - 29
Initial SW holder ASSY removal and disassembly .........................................................................2 - 29
Presser SW holder ASSY removal and disassembly .......................................................................2 - 30
Spring removal .................................................................................................................................2 - 30
Presser SW link removal ..................................................................................................................2 - 30
Tension presser plate removal .........................................................................................................2 - 31
Tension plate removal ......................................................................................................................2 - 31
Thread release link removal .............................................................................................................2 - 32
Thread tension gear assembly removal ............................................................................................2 - 33
Thread take up spring assembly removal ........................................................................................2 - 34
Thread take up spring ASSY disassembly .......................................................................................2 - 34
Thread guide wire removal ..............................................................................................................2 - 34
Spring tape removal .........................................................................................................................2 - 34
Bobbin winder ..................................................................................................2 - 35
Tension guide assembly removal .....................................................................................................2 - 36
Bobbin base assembly removal ........................................................................................................2 - 36
Thread guide plate removal .............................................................................................................2 - 36
Thread guard plate removal .............................................................................................................2 - 36
Sub spool stand pin removal ............................................................................................................2 - 37
Spool pin removal ............................................................................................................................2 - 38
Bobbin winder assembly ..................................................................................................................2 - 38
Bobbin presser cover removal .........................................................................................................2 - 39
BWSW assembly (D6) removal ......................................................................................................2 - 39
Spring removal .................................................................................................................................2 - 40
Bobbin presser guide assembly removal .........................................................................................2 - 40
Bobbin presser removal ...................................................................................................................2 - 40
BW motor assembly removal ..........................................................................................................2 - 40
Rotary hook driving unit, feed/rotary hook unit, thread cutter unit, side feed unit .2 - 41
Lead wire guide holder removal ......................................................................................................2 - 42
Side feed module removal ...............................................................................................................2 - 42
Thread cutter module removal .........................................................................................................2 - 42
Feed/rotary hook module removal ...................................................................................................2 - 43
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