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ELNA 6004 Service Manual

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Service Manual
September 1997
395 901- 42
Printed in Switzerland

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Table of Contents

   Summary of Contents for ELNA 6004

  • Page 1 Service Manual September 1997 395 901- 42 Printed in Switzerland...
  • Page 2: Table Of Contents

    Elna International Corps. SA 6004 Service manual CONTENT Disassemble and assemble the external parts Top cover and Face Plate Base and Bed Cover Belt Cover Front Panel To Replace and Adjustment Presser Bar Height Needle Centering Needle Bar height Hook and Feed timing...
  • Page 3: Top Cover And Face Plate

    Elna International Corps. SA 6004 Service manual TOP COVER AND FACE PLATE TOP COVER 1 To remove : 2 Remove the tree set screws A and B and the Top cover. 3 To attach : 4 Attach the top cover with the tree screws A and B FACE PLATE 1.
  • Page 4: Base And Bed Cover

    Elna International Corps. SA 6004 Service manual BASE AND BED COVER BASE 1 To remove : 2 Remove six set screws A and base. 3 To attach : 4 Attach the bsase with six set screws A BED COVER 1 To remove : 2 Move the fed drop lever to the left, then remove the two set screws B.
  • Page 5: Belt Cover

    Elna International Corps. SA 6004 Service manual BELT COVER BELT COVER To remove : 1 Remove two set screws A and belt cover To attach 1 Attach the belt cover with two set screws A . Page 03...
  • Page 6: Front Panel

    Elna International Corps. SA 6004 Service manual FRONT PANEL FRONT PANEL To remove : 1. Remove the top cover, belt cover and bed cover (see pages 1, 2 and 3). 2. Remove set screw A and loosen set screws B, C, D, E, F and G.
  • Page 7: Presser Bar Height

    Elna International Corps. SA 6004 Service manual PRESSER BAR HEIGHT The standard presser bar height is 6.0 mm between the bottom surface of the foot and needle plate when presser bar lifter is in up position 1. Open the face plate 2.
  • Page 8: Needle Centering

    Elna International Corps. SA 6004 Service manual NEEDLE CENTRING When selecting pattern 10, the needle should be in center position of needle slot in the needie plate, or when the needie swing is in maximum zigzag width, the distance between both sides of needie slot in the needie plate and the needie positions should be equal.
  • Page 9: Needle Bar Height

    Elna International Corps. SA 6004 Service manual NEEDLE BAR HEIGHT A regular needie #14 should be used for this adjustment The distance between the upper edge of needie eye and the tip of shuttle hook should be in the range of 1.6 - 2.0 mm when the tip of shuttle hook meets the right side of the needie as the needle is moved up from its left and lowest position by turning the handwheel toward you.
  • Page 10: Hook And Feed Timing

    Elna International Corps. SA 6004 Service manual HOOK AND FEED TIMING A regular needie B #14 should be used for this adjustment. Select pattern 10. Turn thé handwheel toward you to position thé needie bar from its lowest position, moving up approximately 2,30 mm to 2,60 mm.
  • Page 11: Clearance Between Needle And Hook

    Elna International Corps. SA 6004 Service manual CLEARANCE BEWEEN NEEDLE AND HOOK The clearance between needle and shuttle hook should be -0.10 mm to +0.05 mm. If not, adjust as follows: Remove the needie plate and bobbin case Replace the needie with master needle D...
  • Page 12: Backlash Of Hook Drive Gear And Lower Shaft Gear

    Elna International Corps. SA 6004 Service manual BACKLASH OF HOOK DRIVE GEAR LOWER SHAFT GEAR The backlash of gears should be smooth and should be less than 0.8 mm when the tip of shuttle hook is within the width of the feed dog as shown below.
  • Page 13: Feed Dog Height

    Elna International Corps. SA 6004 Service manual FEED DOG HEIGHT When pressure adjusting lever is at «3 » A and the presser foot B is lowered, the highest position of the feed dog C should be 0.80 mm to 0.90 mm from the surface of the needle plate 1.
  • Page 14: Upper Shaft Shield Plate Position

    Elna International Corps. SA 6004 Service manual UPPER SHAFT SHIELD PLATE POSITION When the machine is set for zigzag stitching, the needle should start to swing 6.3 mm to 7.5 mm above the surface of the needle plate. Remove top cover (See page 1) Turn on the power switch and select pattern (14) Slowly turn the handwheel toward you until the needle starts to swing if higher than 7.5 mm,...
  • Page 15: Upper Thread Tension

    Elna International Corps. SA 6004 Service manual UPPER SHAFT SHIELD PLATE POSITION When the machine is set for zigzag stitching, the needle should start to swing 6.3 mm to 7.5 mm above the surface of the needle plate. 1. Remove top cover (See page 1) 2.
  • Page 16: Stretch Stitch Feed Balance

    Elna International Corps. SA 6004 Service manual STRETCH STITCH BALANCE When pattern "8" is sewn with the feed balancing dial D at the normal setting mark (►) the sewn pattern should be as indicated in the mark 0 in the following figure.
  • Page 17: Needle Threaded Plate

    Elna International Corps. SA 6004 Service manual NEEDLE THREADER PLATE When needle threader plate is broken or bent, replace it in the following manner: To replace: 1. Turn the handwheel toward you until the needle bar reaches its highest position and lower the needle threader knob as far as it will go.
  • Page 18: Buttonhole Lever And Sensor

    Elna International Corps. SA 6004 Service manual BUTTONHOLE LEVER AND SENSOR When replacing the BH lever or necessitating a modification, adjust thE BH lever as follows: BUTTONHOLE LEVER 1. Fasten the automatic buttonhole foot R 2. Push forward the buttonhole sole and adjust a clearance of 2,9 mm between the spring holder C and slider B (use for this adjustment the sewing guide from the accessories box) 3.
  • Page 19: Circuit Board A

    Elna International Corps. SA 6004 Service manual CIRCUIT BOARD A CIRCUIT BOARD A To remove Remove thé front panel unit (see page 4) Unpiug thé seven (7) connectors from circuit board A Remove tree (3) set screws and remove thé circuit board A To attach 1.
  • Page 20: Circuit Board C

    Elna International Corps. SA 6004 Service manual CIRCUIT BOARD C To remove 1. Remove the front panel (see page 4). 2. Loosen screws A, B, C and D, and remove set screw E and F. 3. Remove the rear cover.
  • Page 21: Circuit Board C And Fuse

    Elna International Corps. SA 6004 Service manual CIRCUIT BOARD C AND FUSE To remove: 1. Remove the rear cover. 2. Remove three (3) set screws A and circuit board C (See page 20). 3. Remove three (3) set screws B and remove case cover D.
  • Page 22: Dc Motor

    Elna International Corps. SA 6004 Service manual DC MOTOR To remove 1. Remove the front panel (see page 4). 2. Remove the machine socket (see page 22). No need to unplug the connector. 3. Remove the motor belt, set screw A and cord guide.
  • Page 23: Transformer

    Elna International Corps. SA 6004 Service manual TRANSFORMATOR To remove 1. Remove the front panel (see page 4). 2. Remove the circuit board A and circuit board C (see pages 18 and 19). 3. Unplug the connectors for the transformer E from the circuit board C.
  • Page 24: Machine Socket

    Elna International Corps. SA 6004 Service manual MACHINE SOCKET To remove 1. Remove the front panel and the rear cover (See pages 4 and 19). 2. Remove the circuit board C (See page 18). 3. Unpliug the connectors of machine socket from circuit board A and C.
  • Page 25: Buttonhole Lever

    Elna International Corps. SA 6004 Service manual BUTTONHOLE LEVER To remove: 1. Remove the set screw B and the buttonhole shield plate. 2. Remove the snap ring C. 3. Pull the BH lever toward you and remove it. To attach: 4.
  • Page 26: Circuit Board K And F

    Elna International Corps. SA 6004 Service manual CIRCUIT BOARD K AND F CIRCUIT BOARD K To remove: 1. Remove the front panel (See page 4). 2. Remove the eught (8) screws A. 3. Unplug the connector of circuit board F and remove circuit board K.
  • Page 27: Buttonhole Sensor

    Elna International Corps. SA 6004 Service manual BUTTONHOLE SENSOR To remove 1. Remove the front panel (see page 4). 2. Remove set screw A and removes the buttonhole sensor F from sensor set plate B. 3. Unplug the connector C of BH sensor from circuit board K.
  • Page 28: Wiring Diagram

    Elna International Corps. SA 6004 Service manual WIRING DIAGRAM The connectors oft the electrical components should be connected to the respective positions shown in the figure below. Thread tension switch Stepp motor (feed) BH sensor Connector circuit R Lamp socket...
  • Page 29: General Function Check And Test Program

    Elna International Corps. SA 6004 Service manual GENERAL FUNCTION CHECK AND TEST PROGRAM General function check. If nothing happens when the power switch is turned on, turn off the power switch and do the following: Note:Be cautions when checking, as the machine may suddenly start running.
  • Page 30 Elna International Corps. SA 6004 Service manual TEST PROGRAM TEST TEST OPERATION CORRECT CONDITION DEFECT CONDITION 1. LCD et LED Tum on the power switch 1. Buzzer sounds. Test Mode is not activated. Test. while pressing the « 2. The LCD displays: 1.
  • Page 31 Elna International Corps. SA 6004 Service manual TEST PROGRAM TEST TEST OPERATION CORRECT DEFECT CONDITION CONDITION 6. Zigzag Step motor After test (5) has been 1. Buzzer sounds. No display, or the Zigzag Test completed, press 2. The LCD displays: Motor does not move the «Visual»...
  • Page 32 Elna International Corps. SA 6004 Service manual TEST PROGRAM When all tests have been completed, the LCD displays: SELF - CHECK END. Press the « VISUAL » button. If no problems were detected during the test, the buzzer sounds and the LCD...

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