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SERVICE MANUAL
MODEL: eXperience 520

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Table of Contents

   Also See for ELNA eXperience 520

   Summary of Contents for ELNA eXperience 520

  • Page 1 SERVICE MANUAL MODEL: eXperience 520...
  • Page 2: Table Of Contents

    TABLE OF CONTENTS WHAT TO DO WHEN ......................1-3 SERVICE ACCESS (1) FACE COVER ................4 SERVICE ACCESS (2) BED COVER ................. 5 SERVICE ACCESS (3)(4) FRONT COVER ..............6-7 SERVICE ACCESS (5) REAR COVER ................8 MECHANICAL ADJUSTMENT PRESSER BAR HEIGHT AND ALIGNMENT ................9 NEEDLE DROP POSITION .......................
  • Page 3: What To Do When

    MODEL 520 WHAT TO DO WHEN CONDITION CAUSE HOW TO FIX REFERENCE 1. Skipping 1. Needle is not inserted properly. Insert the needle properly. stitches 2. Needle is bent or worn. Change the needle. 3. Incorrectly threaded. Rethread. 4. Needle or thread are Use the recommended sewing needle inappropriate for fabric being and thread.
  • Page 4 MODEL 520 CONDITION CAUSE HOW TO FIX REFERENCE 3. Breaking 1. Initial sewing speed is too fast. Start with medium speed. upper thread 2. Thread path is incorrect. Use the proper thread path. 3. Needle is bent or dull. Replace with a new needle. 4.
  • Page 5 MODEL 520 CONDITION CAUSE HOW TO FIX REFERENCE 6. Noisy 1. Backlash between shuttle hook See mechanical adjustment P. 14 operation gear and lower shaft gear is too “Backlash (lower shaft gear)”. great. 2. Lower shaft gear is loose. Eliminate the looseness. 3.
  • Page 6: Face Cover

    MODEL 520 SERVICE ACCESS (1) FACE COVER TO REMOVE: 1. Remove the cap. 2. Remove the setscrew (A) and remove the face cover. TO INSTALL: 3. Insert the three ribs and the hook on the face cover into the rear cover. Tighten the setscrew (A) and attach the cap.
  • Page 7: Service Access (2) Bed Cover

    MODEL 520 SERVICE ACCESS (2) BED COVER TO REMOVE: 1. Set the drop lever to the left and remove the three setscrews (A), remove the bed cover. TO INSTALL: 2. Set the drop lever to the left and install the bed cover. Secure it in place with the three setscrews (A).
  • Page 8: Front Cover

    MODEL 520 SERVICE ACCESS (3) FRONT COVER TO REMOVE: 1. Remove the face cover and bed cover (see pages 4 and 5). 2. Loosen the setscrews (A) and then remove the setscrew (B), (C), (D), (E) and (F). 3. Remove the front cover (see page 20) and disconnect each switch connector. NOTES: TO DISCONNECT THE CONNECTORS: Grasp the connector directly with your fingers and pull.
  • Page 9: Front Cover

    MODEL 520 SERVICE ACCESS (4) HOW TO REMOVE THE FRONT COVER 1. Remove the hooks on the front cover and the rear cover (indicated by the white arrows) and the hook on the base. 2. Remove the feed balancing dial. 3.
  • Page 10: Rear Cover

    MODEL 520 SERVICE ACCESS (5) REAR COVER TO REMOVE: 1. Remove the front cover (see pages 6 and 7). 2. Loosen the setscrews (A), (B), (C), (D) and (E). * To remove the cover, detach the presser foot lifter section first, with the presser foot lifter in the down position.
  • Page 11: Mechanical Adjustment

    MODEL 520 MECHANICAL ADJUSTMENT PRESSER BAR HEIGHT AND ALIGNMENT When the presser foot is raised, the clearance between the presser foot and the needle plate should be 6.0 mm. When the presser foot is lowered, the edge of the foot and the feed dog window on the needle plate should be parallel.
  • Page 12: Needle Drop Position

    MODEL 520 MECHANICAL ADJUSTMENT NEEDLE DROP POSITION Set the stitch pattern at " "; the standard needle drop position should be at the center of the needle plate hole. When the needle swings in maximum zigzag width " ", the distance between both ends of the needle hole on the needle plate and the needle should be 0.2 mm or more.
  • Page 13: Needle To Shuttle Timing

    MODEL 520 MECHANICAL ADJUSTMENT NEEDLE TO SHUTTLE TIMING When the machine is set the straight stitch pattern no.2 ( left needle position), the amount of ascending travel of the needle bar from its lowest position to the position where the tip of the hook meets the right side of the needle should be 3.25 - 3.55 mm.
  • Page 14: Needle Bar Height

    MODEL 520 MECHANICAL ADJUSTMENT NEEDLE BAR HEIGHT The distance between the upper edge of needle eye and the tip of the hook should be in the range of 1.6-2.0 mm when the tip of hook meets the right side of the needle in ascending travel of needle from its left and lowest position.
  • Page 15: Needle Clearance To Shuttle

    MODEL 520 MECHANICAL ADJUSTMENT NEEDLE CLEARANCE TO SHUTTLE The clearance between the needle and the tip of hook should be -0.1 to +0.05 mm. PREPARATION: 1. Remove the needle plate, bobbin holder, and bed cover, and replace the needle with the test pin (D).
  • Page 16: Backlash (between Lower Shaft Gear And Shuttle Hook Gear)

    MODEL 520 MECHANICAL ADJUSTMENT BACKLASH (BETWEEN LOWER SHAFT GEAR AND SHUTTLE HOOK GEAR) Jog the hook race back and forth to check rotary play. The standard play should be 0.8 mm (0.03") or less when the hook point is within the feed dog width.
  • Page 17: Feed Dog Height

    MODEL 520 MECHANICAL ADJUSTMENT FEED DOG HEIGHT The highest position of the feed dog should be between 0.8 to 0.9 mm from the surface of the needle plate when the pressure dial is set at "3" and the presser foot is raised. 1.
  • Page 18: Zigzag Synchronization

    MODEL 520 MECHANICAL ADJUSTMENT ZIGZAG SYNCHRONIZATION The needle should start swing between 6.3 to 7.5 mm above the surface of the needle plate when the machine is set for zigzag stitching. 1. Remove the front cover (see to page 7). 2.
  • Page 19: Needle Thread Tension

    MODEL 520 MECHANICAL ADJUSTMENT NEEDLE THREAD TENSION The standard tension should be 75 to 90 grams when the tension dial is set at "4", measured with a #50 white polyester thread being pulled at approximately 110 mm/sec. If the tension is outside the standard range, adjust as follows: ADJUSTMENT: 1.
  • Page 20: Stretch Stitch Feed Balance

    MODEL 520 MECHANICAL ADJUSTMENT STRETCH STITCH FEED BALANCE When a stretch stitch pattern is sewn with the feed balancing dial position set at the standard setting mark " ", the stitch pattern should look like the one marked with a " "...
  • Page 21: Replacement And Adjustment Of The Needle Threader Plate

    MODEL 520 MECHANICAL ADJUSTMENT REPLACEMENT AND ADJUSTMENT OF THE NEEDLE THREADER PLATE If the hook of the threader plate is damaged, change or adjust the part as follows: TO CHANGE THE THREADER PLATE: TO REMOVE: 1. Push down the needle threader knob and pull the needle threader plate (A) down to remove it (see FIG 1).
  • Page 22: Connector Diagram

    MODEL 520 CONNECTOR DIAGRAM Refer to the diagram for locating the connector posts to which each connectors should be connected. NOTES: TO DISCONNECT THE CONNECTORS: 1. Grasp the connector directly with your fingers and pull. Do not pull the lead wire, as this may damage the contact sleeve inside the connector. 2.
  • Page 23: Self Diagnostic Tests

    MODEL 520 SELF DIAGNOSTIC TESTS PREPARATION: * Turn off the power switch. * Shift the bobbin winder spindle to the left. * Raise the feed dog. * Shift the slide volume to the left. * Remove the presser foot and raise the presser foot lifter. * Turn the handwheel toward you to raise the needle to its highest position.
  • Page 24: Self Diagnostic Sheet

    MODEL 520 SELF DIAGNOSTIC SHEET STEP AND ITEMS TO PROCEDURE CORRECT RESULTS DEFECTIVE RESULTS CHECK Turn on the power switch while * Beep sounds when the buttons are * No beep sound. 7-segment simultaneously pressing the #01 pressed. * Does not enter self-diag- button and the #16 button.
  • Page 25 MODEL 520 DEFECTIVE CONDITION STEP OPERATION CORRECT CONDITION Press #01 button, led displays Led display is different from Buttonhole "06" for one second. that shown to the left. sensor 1. Lower the buttonhole lever. * When the buttonhole lever 1. Adjust the buttonhole sensor position.
  • Page 26 MODEL 520 STEP OPERATION CORRECT CONDITION DEFECTIVE CONDITION Press #01 button, When the speed control lever is at the * Led display is different from Slide led displays "09" for one left, led displays "00". that shown to the left. volume second.
  • Page 27 MODEL 520 STEP OPERATION CORRECT CONDITION DEFECTIVE CONDITION Press needle up/down button, * Led indicates "dc". Machine does not run, led DC motor led indicates "12" for one * Machine runs at the speed set by displays "Lo". second. the speed control lever. * Press foot control.
  • Page 28: Replacing Printed Circuit Board A

    MODEL 520 REPLACING PRINTED CIRCUIT BOARD A TO REMOVE: 1. Remove the front cover (see page 6 and 7). 2. Unplug the connectors from the board "A". 3. Remove the 6 screws and remove board "A". NOTES: TO DISCONNECT THE CONNECTORS: 1.
  • Page 29: Replacing Slide Volume And Printed Circuit Board F

    MODEL 520 REPLACING SLIDE VOLUME AND PRINTED CIRCUIT BOARD F REPLACING THE SLIDE VOLUME TO REMOVE: 1. Remove the front cover unit (see page 6 and 7). 2. Unplug the slide volume connector. 3. Remove the four CS ring (A), (B) and remove the side volume. TO INSTALL: 4.
  • Page 30: Replacing Dc Motor And Adjusting Motor Belt Tension

    MODEL 520 REPLACING DC MOTOR AND ADJUSTING MOTOR BELT TENSION TO REMOVE: 1. Remove the front and rear covers (see page 6 and 8). 2. Remove the two setscrews, then remove the DC motor and belt. TO INSTALL: 3. Lightly tighten the two screws. 4.
  • Page 31: Replacing The Fuses

    MODEL 520 REPLACING THE FUSES REPLACING THE FUSES TO REMOVE: 1. Remove the front cover (see page 6 and 7). 2. Remove the four setscrews and lift off the cover on printed circuit board "A". 3. Remove the fuse. (Pry it out with a screwdriver). TO INSTALL: 4.
  • Page 32: Replacing Machine Socket (unit)

    MODEL 520 REPLACING MACHINE SOCKET (UNIT) REPLACING THE MACHINE SOCKET TO REMOVE: 1. Remove the front and rear cover (see page 6 and 8). 2. Remove the two screws and remove the machine socket. TO INSTALL: 3. To install the machine socket, follow the above procedure in reverse. NOTES: Pull out the cord in front of the arm to prevent it from contacting with the lower shaft or other moving parts, and secure it to the feed motor cord with a binder.
  • Page 33: Replacing The Transformer

    MODEL 520 REPLACING THE TRANSFORMER REPLACING THE TRANSFORMER TO REMOVE: 1. Remove the front cover (see page 6 and 7). 2. Remove the two setscrews and remove the transformer. Cut off the binder. TO INSTALL: 3. To install the transformer, follow the above procedure in reverse. NOTES: Place the rear end of the transformer on the transformer support.
  • Page 34: Replacing The Zigzag Width Motor

    MODEL 520 REPLACING THE ZIGZAG WIDTH MOTOR REPLACING THE ZIGZAG WIDTH MOTOR TO REMOVE: 1. Remove the front and rear cover (see page 6 and 8). 2. Remove the two zigzag rod setscrews (A). 3. Remove the two setscrews (B) and remove the zigzag width motor. TO INSTALL: 4.
  • Page 35: Replacing The Feed Stitch Motor

    MODEL 520 REPLACING THE FEED STITCH MOTOR REPLACING THE FEED MOTOR TO REMOVE: 1. Remove the front cover and rear covers (see page 6 and 8). 2. Remove the snap ring (E-3). 3. Remove the two setscrews and remove the feed motor. TO INSTALL: 4.
  • Page 36: Adjusting Buttonhole Lever Position

    MODEL 520 ADJUSTING BUTTONHOLE LEVER POSITION TO ADJUST THE BUTTONHOLE LEVER GUIDE: 1. Set the machine in buttonhole sensor adjusting mode. (See below. The led should display "H" or "l".) 2. Remove the face cover and loosen setscrew (A). 3. Lower the buttonhole lever. Loosen the setscrew and position the buttonhole lever guide so the led displays "l"...
  • Page 37: Adjusting The Bobbin Winder Switch

    MODEL 520 ADJUSTING THE BOBBIN WINDER SWITCH TO ADJUST THE BOBBIN WINDING SWITCH 1. Remove the front cover (see page 6 and 7). 2. Set the bobbin winder arm in the sewing position and loosen the setscrew. Adjust the clearance between the bobbin winder arm and the switch fixing plate to 0.7 to 13mm. 3.
  • Page 38: Oiling

    MODEL 520 OILING Factory lubricated parts will provide years of household sewing without routine oiling, but you should still check for possible lubrication needs whenever servicing machines. OIL: Use good quality sewing machine oil at the points (A, B, C, D, E, F, G, H, I, J & K) indicated by the black arrows.

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