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First Edition: 26 June 2015
SERVICE MANUAL
MODEL: 1000 Sew 75

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Table of Contents

   Summary of Contents for ELNA 1000 Sew 75

  • Page 1 First Edition: 26 June 2015 SERVICE MANUAL MODEL: 1000 Sew 75...
  • Page 2: Table Of Contents

    CONTENTS TROUBLESHOOTING ......................1 - 3 SERVICE ACCESS (1) FACE COVER, BELT COVER ............4 SERVICE ACCESS (2) BASE PLATE ..................5 SERVICE ACCESS (3) FRONT COVER ................. 6 SERVICE ACCESS (4) REAR COVER ................... 7 TOP TENSION ......................... 8 BOBBIN TENSION ........................
  • Page 3: Troubleshooting

    TROUBLESHOOTING PROBLEM CAUSE REMEDY REFERENCE 1. Skipping 1. Needle is not inserted Insert the needle properly. stitches properly. 2. Needle is bent or worn. Change the needle. 3. Incorrectly threaded Rethread. 4. Needle or thread are Use the recommended sewing inappropriate for fabric being needle and thread.
  • Page 4 PROBLEM CAUSE REMEDY 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 PROBLEM CAUSE REMEDY REFERENCE 6. Noisy 1. Backlash between shuttle hook See mechanical adjustment P. 14 operation gear and lower shaft gear is “Clearance between needle and too great. hook (NO. 2).” 2. Lower shaft gear is loose. Eliminate the looseness. 3.
  • Page 6: Service Access (1) Face Cover, Belt Cover

    SERVICE ACCESS (1) FACE COVER Face cover (To remove) Remove the face cover by removing the setscrew (A). (To attach) Mount the face cover in reverse procedure of the removing. BELT COVER Belt cover (To remove) Loosen setscrew (B). Take the belt cover out. (To attach) Mount the belt cover in reverse procedure of the removing.
  • Page 7: Service Access (2) Base Plate

    SERVICE ACCESS (2) BASE PLATE Base plate (To remove) Loosen the setscrews (A). Remove the base plate. (To attach) Mount the base plate in reverse procedure of the removing.
  • Page 8 SERVICE ACCESS (3) FRONT COVER Front cover (To remove) Remove the face cover, and remove the belt cover (See page 4). Remove dial (A). Loosen setscrews (B), (C), (D), (E), and (F) and then, remove the front cover by removing setscrews (G), (H), and (I).
  • Page 9: Service Access (4) Rear Cover

    SERVICE ACCESS (4) REAR COVER Rear cover (To remove) Remove the face cover and belt cover (See page 4). NOTE: Pull up the spool pins. Loosen setscrews (A), (B), (C) and (D) (2 pcs.), and then, remove the rear cover by removing setscrews (E), (F), (G) and (H).
  • Page 10: Top Tension

    MECHANICAL ADJUSTMENT TOP TENSION To check: The standard upper thread tension should be 65–95 g when pulling the thread (cotton thread #50) in the direction of (B) with setting the tension dial at "3". (make sure the foot should be lowered.) If the tension is out of the standard range, adjust it as follows: Adjustment procedure: Remove the front cover unit (See page 6).
  • Page 11: Bobbin Tension

    MECHANICAL ADJUSTMENT BOBBIN TENSION To check: Set the bobbin in the bobbin case and pass the thread (cotton #50) through the tension spring. The bobbin thread tension should be 45–55g when pulling the thread in the direction of (B). If the tension is out of the range, adjust it as follows: Adjustment procedure: Turn the adjusting screw (C) in the direction of (D) when the bobbin thread tension is too tight.
  • Page 12: Presser Bar Height And Alignment

    MECHANICAL ADJUSTMENT PRESSER BAR HEIGHT AND ALIGNMENT To check: Raise the presser foot lever (A). The distance between the presser foot (D) and the needle plate (E) should be 6.0 mm (0.24"). Adjustment procedure: Remove the face cover (See page 4). Raise the presser foot lever and loosen the setscrew (C) on the presser bar holder.
  • Page 13: Needle Swing

    MECHANICAL ADJUSTMENT NEEDLE SWING To check: Adjust the needle swing according to the following procedure, If the needle bar starts moving sideways while the needle is in the fabric when sewing the zigzag pattern (with maximum zigzag width). Adjustment procedure: Set the pattern selector dial with maximum zigzag width, and remove the front cover (See page 6).
  • Page 14: Needle Drop

    MECHANICAL ADJUSTMENT NEEDLE DROP To check: When the needle swings in maximum zigzag width, the distance between both ends of the needle hole on the needle plate and the needle drop positions should be equal. If not, adjust as follows: Adjustment procedure: Remove the face cover (See page 4).
  • Page 15: Clearance Between Needle And Hook (adjustment Method No.1)

    MECHANICAL ADJUSTMENT CLEARANCE BETWEEN NEEDLE AND HOOK (ADJUSTMENT METHOD NO. 1) To check: The clearance between the needle and shuttle race should be –0.05 to +0.10 mm. If not, adjust as follows: Adjustment procedure: Remove the face cover (See page 4). Set the pattern select dial at "...
  • Page 16: Clearance Between Needle And Hook (adjustment Method No.2)

    MECHANICAL ADJUSTMENT CLEARANCE BETWEEN NEEDLE AND HOOK (ADJUSTMENT METHOD NO.2) To check: Use this adjustment method NO. 2 when method NO.1 cannot be used. The clearance between the needle and shuttle race should be –0.05 to +0.10 mm. Adjustment procedure: Set the pattern selector dial at "...
  • Page 17: Feed Dog Height

    MECHANICAL ADJUSTMENT FEED DOG HEIGHT To check: Lower the presser foot. Turn the handwheel toward you to bring the feed dog to its highest position. The height of the feed dog from the needle plate should be 0.75-0.90mm. If it is not in the range, adjust as follows. Adjustment procedure: Open the shuttle cover.
  • Page 18: Needle Bar Height

    MECHANICAL ADJUSTMENT NEEDLE BAR HEIGHT To check: When the tip of shuttle hook meets the left side of the needle in ascending travel of the needle from its left and lowest position, The distance between the top of the needle eye and the tip of the shuttle hook should be in the range of 2.9-3.5 mm.
  • Page 19: Needle Timing To Shuttle

    MECHANICAL ADJUSTMENT NEEDLE TIMING TO SHUTTLE To check: The height of the needle point from its lowest point of travel should be in the range of 1.4-2.0 mm when the tip of the shuttle hook just meets the left side of the needle at the left needle position. Adjustment procedure: Set the pattern selector dial at "...
  • Page 20: Buttonhole Feed Balance

    MECHANICAL ADJUSTMENT BUTTONHOLE FEED BALANCE To check: When sewing buttonhole, the stitches on each side of buttonhole should be the same stitch density. The range of 9-12 stitches in the right side row "backward feeding" against 10 stitches in the left side row "forward feeding"...
  • Page 21: Feed Balance On Stretch Stitch

    MECHANICAL ADJUSTMENT FEED BALANCE ON STRETCH STITCH To check: If the stretch stitch patterns are distorted with setting the stitch length dial at " S.S. ". (In case of being a difference between forward feeding and backward feeding during stretch stitch pattern sewing), make an adjustment as follows: Adjustment procedure: Remove the cap.
  • Page 22: Bartack Feed Of Buttonhole

    MECHANICAL ADJUSTMENT BARTACK FEED OF BUTTONHOLE To check: The acceptable bar-tack feeding of buttonhole should be 1 mm or less in 20 stitches when the stitch length dial is set at “4”. Adjustment procedure: Set the pattern selector dial at " ".
  • Page 23: Disengagement Of Cam Follower

    MECHANICAL ADJUSTMENT DISENGAGEMENT OF CAM FOLLOWER To check: If the clearance between the cam follower and the top convex of the zigzag cam is not enough, the pattern selector dial is blocked or will not select the correct pattern. Adjustment procedure: Remove the front cover (See page 6).
  • Page 24: Motor Belt Tension

    MECHANICAL ADJUSTMENT MOTOR BELT TENSION To check: Improper belt tension may cause noise, overload of motor, slow running or motor belt jumping. The belt deflection should be 7mm - 9mm when pressing the middle of the motor belt with approximately 300 grams of pressure. Adjustment procedure: Remove the belt cover (See page 4).
  • Page 25: Wiring

    WIRING Remove the belt cover. (See page 4.) Remove the screws (A), (B) and machine socket cover. Follow the above procedure in reverse. Machine socket cover Machine socket unit 120V 240V From motor From lamp socket From motor From lamp socket...

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