ELNA eXpressive920 - Default Chapter; Table of Contents

TABLE OF CONTENTS
Replacing External Parts
Face cover .................................................................................................................................................................1
Belt cover ..................................................................................................................................................................1
Top cover unit ............................................................................................................................................................2
Base plate ..................................................................................................................................................................3
Base cover .................................................................................................................................................................3
Bed cover ..................................................................................................................................................................3
Free arm cover ..........................................................................................................................................................4
Front cover .................................................................................................................................................................5
Rear cover .................................................................................................................................................................6
Replacing Mechanical Parts
Needle threader holder (threader hook) ....................................................................................................................7
Replacing Electronic Components
Printed circuit board A ...............................................................................................................................................8
Printed circuit board U1 .............................................................................................................................................9
Printed circuit board U2 ...........................................................................................................................................10
Printed circuit board K .............................................................................................................................................11
Printed circuit board F .............................................................................................................................................12
Auxiliary power supply unit ......................................................................................................................................13
Switching power supply unit ....................................................................................................................................14
USB unit ..................................................................................................................................................................15
Driving motor ...........................................................................................................................................................16
Thread tension unit ..................................................................................................................................................17
Needle threader motor .............................................................................................................................................18
Mechanical Adjustment
Feed dog height .......................................................................................................................................................19
Needle drop position ................................................................................................................................................20
Hook Timing.............................................................................................................................................................21
Needle bar height ....................................................................................................................................................22
Clearance between needle and tip of rotary hook ............................................................................................. 23-24
Backlash between hook drive gear and lower shaft gear ........................................................................................25
Upper shield plate position ......................................................................................................................................26
Upper thread tension ...............................................................................................................................................27
Tension release mechanism ....................................................................................................................................28
Needle threader hook position .................................................................................................................................29
Thread drawing lever ...............................................................................................................................................30
Upper feed dog .................................................................................................................................................. 31-33
Buttonhole lever adjustment ....................................................................................................................................34
Thread cutter ...........................................................................................................................................................35
Presser bar lifter position .........................................................................................................................................36
Presser foot lifter stopper position ..................................................................................................................... 37-39
Automatic presser foot lifter initializing sensor position ...........................................................................................40
Presser bar height ...................................................................................................................................................41
Embroidery foot height ............................................................................................................................................42
Stretch stitch balance ..............................................................................................................................................43
Knee lifter ................................................................................................................................................................44
Remaining bobbin thread sensor .............................................................................................................................45
Cloth guide start position .........................................................................................................................................46
Preparation ........................................................................................................................................................ 47-50
• Removing Y-carriage cover (upper) ...................................................................................................................... 47
• Removing X-carriage cover and Embroidery unit cover .................................................................................. 48-50
Replacing X-motor .................................................................................................................................................. 51
Replacing Y-motor ............................................................................................................................................. 51-56
• Removing Y-carriage cover (lower) ................................................................................................................. 51-52
• Removing Film ..................................................................................................................................................... 52
• Removing Film guides .......................................................................................................................................... 53
• Removing Y-carriage ...................................................................................................................................... 53-54
• Removing Y-motor .......................................................................................................................................... 55-56
Replacing Printed Circuti Board S1 ........................................................................................................................ 57
Replacing Embroidery Unit Detecting Switch ......................................................................................................... 57
Replacing Film ........................................................................................................................................................ 58
Replacing X-sensor .......................................................................................................................................... 59-60
Replacing X-belt ..................................................................................................................................................... 61
Replacing Printed Circuit Board S2 ........................................................................................................................ 62
Replacing Y-sensor ................................................................................................................................................. 62
Replacing Y-belt ...................................................................................................................................................... 63
Carriage Adjustment (Backlash of Y-carriage) ........................................................................................................ 64