Brother NV15 - Page 4

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1. Outline of Mechanism ........................................................................1 - 1
Main Mechanisms ...........................................................................1 - 2
Driveline ..........................................................................................1 - 3
Positions of electronic components ................................................1 - 4
Control system block diagram .........................................................1 - 5
Operation of other electronic components ......................................1 - 6
Using the threader ..........................................................................1 - 7
2. Disassembly ........................................................................................2 - 1
Main parts ..........................................................................................................2 - 2
Removal of Accessory table ..............................................................................................................2 - 3
Disassembly of Accessory table ....................................................................................................2 - 3
Removal of Face plate assy. ..............................................................................................................2 - 3
Disassembly of Face plate assy. ....................................................................................................2 - 3
Removal of Needle plate B assy. .......................................................................................................2 - 4
Disassembly of Needle plate B assy. ............................................................................................2 - 4
Removal of Free arm cover ...............................................................................................................2 - 4
Removal of Free arm plate .................................................................................................................2 - 5
Removal of Base plate cover .............................................................................................................2 - 5
Removal of Front cover assy. ............................................................................................................2 - 6
Disassembly of Front cover assy. (Removal of LED lamp-R) .....................................................2 - 7
Disassembly of Front cover assy. (Removal of SSVR PCB assy.) ...............................................2 - 7
Disassembly of Front cover assy. (Removal of Buttons) ..............................................................2 - 7
Disassembly of Front cover assy. (Removal of SV key top) ........................................................2 - 8
Removal of Selecting panel H assy. ..................................................................................................2 - 9
Disassembly of Selecting panel H assy. (Removal of Operation PCB assy.) ...............................2 - 9
Disassembly of Selecting panel H assy. (Removal of Buttons) ..................................................2 - 10
Disassembly of Selecting panel H assy. (Removal of Selecting dial) ........................................2 - 11
Disassembly of Selecting panel H assy. (Removal of Single light guide assy.) .........................2 - 11
Removal of Rear cover assy. ...........................................................................................................2 - 12
Disassembly of Rear cover assy. (Removal of Bobbin presser) .................................................2 - 12
Disassembly of Rear cover assy. (Removal of Spool pin) ..........................................................2 - 13
Disassembly of Rear cover assy. (Removal of Thread guide supporting plate) .........................2 - 13
Disassembly of Rear cover assy. (Removal of Thread guide plate assy.) ..................................2 - 14
Electrical parts and main motor .......................................................................2 - 15
Removal of Shutter cover ................................................................................................................2 - 16
Disassembly of Shutter cover (Removal of Main PCB assy.) ....................................................2 - 16
Removal of Power supply assy. .......................................................................................................2 - 17
Removal of Insulation cover ............................................................................................................2 - 17
Removal of PWSW assy. .................................................................................................................2 - 18
Removal of Pin jack assy. ................................................................................................................2 - 18
Removal of Main motor sub assy. ...................................................................................................2 - 18
Disassembly of Main motor sub assy. .........................................................................................2 - 18
Thread tension mechanism .............................................................................2 - 19
Removal of Thread unit L ................................................................................................................2 - 20
Disassembly of Thread unit L (Removal of Thread guard cover) ..............................................2 - 20
Disassembly of Thread unit L (Removal of Bobbin winder guide assy.) ...................................2 - 20
Disassembly of Thread unit L (Removal of Thread tension dial) ...............................................2 - 21
Disassembly of Thread unit L (Removal of Thread guide wire) ................................................2 - 21