ELNA eXpressive920 Manuale utente
SERVICE MANUAL
eXpressive920
First Edition 01 September 2015
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
1
Replacing External Parts (1)
Face cover
To remove:
1. Open the face cover.
Disconnect the connector.
2. Remove the setscrews A (2 pcs.).
Remove the face plate.
To attach:
1. Follow the above procedure in reverse.
Belt cover
To remove:
1. Remove the caps.
2. Remove the setscrews B and C.
Connector
Face cover
Caps
Setscrews B
Setscrew D
Setscrew C
Setscrew E
3. Loosen the setscrew D.
4. Loosen the setscrew E.
Remove the belt cover.
To attach:
Follow the above procedure in reverse.
NOTE:
The setscrew C is tapping screw.
Setscrews A
2
Replacing External Parts (2)
Top cover unit
To remove:
1. Open the top cover.
Remove the setscrews A and B.
2. Close the top cover.
Raise the carrying handle.
Remove the setscrew C.
5. Detach the top cover for the machine.
Be careful not to pull the bobbin winder motor cords.
Disconnect the connector from the printed circuit board U1.
Remove the top cover.
To attach:
Follow the above procedure in reverse.
Be careful not to pinch the cords when atttaching the top cover
to the machine.
Setscrew A
Setscrew B
Setscrew C
Connector
3. Pry up the front edge of the top cover body to unhook it
from the front cover.
4. Lift the top cover unit and draw it out to the left.
Bobbin winder motor cords
3
Base plate
To remove:
1. Remove the setscrews A (3 pcs.).
2. Remove the setscrews B (2 pcs.).
3. Remove the base plate.
To attach:
Follow the above procedure in reverse.
Replacing External Parts (3 )
Setscrews A
Setscrew A
Setscrew B
Setscrew B
Base cover
To remove:
1. Remove the extension table.
2. Remove the setscrews C (4 pcs.).
Remove the setscrews D (3 pcs).
Remove the base cover.
To attach:
Follow the above procedure in reverse.
Base plate
Bed cover
To remove:
1. Remove the extension table.
2. Remove the setscrews E (2 pcs).
Remove bed cover.
To attach:
1. Follow the above procedure in reverse.
Setscrews E
Bed cover
Setscrews C
Setscrews C
Setscrews D
Base cover
4
Replacing External Parts (4)
Hook A Hook C
Free arm cover
To remove:
1. Remove the presser foot. Push down the needle plate
release lever to remove the needle plate.
Remove the bed cover (see page 3).
2. Remove the threaded pin.
3. Loosen the setscrew and unhook the hook A by sliding
the free arm cover to the left.
4. Pull the free arm cover to the left and lift the part B to clear
the needle palte base, and remove the free arm cover.
To attach:
1. Place the free arm cover on the free arm inserting the
hook C into the opening.
2. Insert the right end of the free arm cover under the
front cover by pushing the right end. Push the free arm
cover until all the hooks and tabs snap in place.
3. Follow the steps 1 to 3 of removal procedure in reverse.
Needle plate release lever
Needle plate
Pin
Hook A
Setscrew
BNeedle plate base
5
Front cover
Hole G
Replacing External Parts (5)
Hole H
Front cover
To remove:
1. Remove the belt cover and top cover (see pages 1 and 2).
2. Loosen the setscrews (A, B, C, D, E and F).
3. Push down the rear cover through the holes (G and H)
with a screwdriver to unhook it from the front cover.
4. Disconnect the all connectors. Remove the front cover.
To attach:
Follow the above procedure in reverse.
Setscrew A
Setscrew B
Setscrew C
Setscrew D
Setscrew E Setscrew F
6
Replacing External Parts (6)
Connector Setscrew A
Face cover
Setscrew B
Rear cover
To remove:
1. Remove the belt cover, top cover and base cover (see
page 1, 2 and 3).
2. Open the face plate and disconnect the connector.
3. Loosen the setscrews A and B.
4. Remove the setscrews C (2 pcs.) and D (2 pcs).
Setscrews C
Setscrew D
Holes E
5. Push down the rear cover through the holes E to unhook it
from the front cover.
6. Remove the rear cover.
To attach:
Follow the above procedure in reverse.
7
Replacing Mechanical Parts
Needle threader holder (threader hook)
To remove:
1. Loosen the setscrew to remove the needle threader
holder.
2. Disassemble the threader unit and replace the threader
hook. Refer the following part number when ordering service
parts.
862627005: Hook holder (unit)
To attach:
1. Assemble the threader unit as illustrated and attach them to
the threader shaft by inserting the shaft into the holes.
Make sure the pin is engaged in the slot.
2. Secure the threader unit to the threader shaft by tightening
setscrew.
Adjust the needle threader hook position (see page xx).
Setscrew
Hook holder (unit) (862627005)
Setscrew
Slot
Pin
8
Driving motor
Phase sensor
Board A schematic
Printed circuit board U1 relay (24-pin)
Printed circuit board U2 relay (18-pin)
Printed circuit board U2 relay (20-pin)
Knee lifter sensor
LCD
Printed circuit board U1 relay (26-pin)
Printed circuit board B (USB board)
Foot control
Replacing Electronic Components
Printed circuit board A
NOTE:
Do not disconnect the connectors by pulling on cord.
To disconnect the connectors, grasp the connector, not the
cord.
To remove:
1. Remove the front cover (see page 5).
2. Disconnect the connectors. Remove the setscrews
(4 pcs.) and printed circuit board A.
To attach:
Follow the above procedure in reverse.
After replacing the printed circuit board A, adjust the following
parts:
• Knee Lifter (see page 48)
• Cloth guide start position (see page 53)
• Remaining bobbin thread sensor (see page 49)
• Presser bar height (see page 44)
• Embroidery foot height (see page 45)
* Adjust the embroidery foot height after the presser bar
height adjustment.
Printed circuit board A
Setscrew
Printed circuit board K1 relay (6-pin)
Printed circuit board K1 relay (26-pin)
Printed circuit board K1 relay (30-pin)
Printed circuit board U2 relay (14-pin)
TTP (Touch panel)
LCD module
Switching power supply unit
Auxiliary power supply unit
Setscrew
Setscrew
Setscrew
Indice
Altri manuali ELNA Macchina da cucire
ELNA
ELNA 3210 Manuale utente
ELNA
ELNA 6200 - Manuale utente
ELNA
ELNA 8007 Schema elettrico
ELNA
ELNA 8600 Manuale utente
ELNA
ELNA eXpressive 900 Manuale utente
ELNA
ELNA 434 Manuale utente
ELNA
ELNA 7300 - Manuale utente
ELNA
ELNA eXpressive 970 Manuale utente
ELNA
ELNA PRO 704 DEX Manuale utente
ELNA
ELNA Sew Green Manuale utente
ELNA
ELNA Sew Green Manuale utente
ELNA
ELNA eXpressive 860 Manuale utente
ELNA
ELNA 745 - Manuale utente
ELNA
ELNA 624DSE Manuale utente
ELNA
ELNA 2800 - Manuale utente
ELNA
ELNA eXperience 520 Manuale utente
ELNA
ELNA eXpressive 900 Manuale tecnico
ELNA
ELNA eXcellence 710 Manuale utente
ELNA
ELNA eXcellence 730 Manuale utente
ELNA
ELNA 505 Manuale utente
