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NOVUM 555QE Service Manual

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555QE Service Manual
555 QE
Service Manual
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Summary of Contents for NOVUM 555QE

  • Page 1 555QE Service Manual 555 QE Service Manual...

  • Page 2: Table Of Contents

    GHE-1207 Service Manual CONTENT 1. Presser bar height ------------------------------------------------------------------------------------------------------------------- 3 2. Needle bar height ------------------------------------------------------------------------------------------------------------------- 4 3. Needle drop position --------------------------------------------------------------------------------------------------------------- 5 4. Height of Feed dog ------------------------------------------------------------------------------------------------------------------ 6 5. Transmission of Feed dog (regulate) ------------------------------------------------------------------------------------------- 7 6. Needle clearance in rotary hook ------------------------------------------------------------------------------------------------ 8 7.

  • Page 3: Presser Bar Height

    GHE-1207 Service Manual Presser Bar height Tool: 2.0mm hexagon screwdriver & 6.0mm height of gauge Standard: Height of presser foot is 6.0mm A. Open face cover. B. Lift presser bar lever to upper position. C. Loosen hexagon screw (A) of presser bar guide bracket. D.

  • Page 4: Needle Bar Height

    GHE-1207 Service Manual 2. Needle bar height Tool: 2.0mm hexagon screwdriver, flathead screwdriver. Standard: Sharp point of needle is lowered to touch bottom surface of rotary hook. Note: Needle must be inserted and against the pin in the top and hold. Tighten the needle clamp screw for fixing the needle.

  • Page 5: Needle Drop Position

    GHE-1207 Service Manual 3. Needle drop position Tool: 2.0mm hexagon screwdriver and flathead screwdriver. Standard: 3.5 mm each side in the needle plate hole when Needle position is in the center of needle plate hole. Requirement of Adjustment: Select stitch No. 006 zigzag as adjusting sample pattern, and needle will stop in right position.

  • Page 6: Height Of Feed Dog

    GHE-1207 Service Manual 4. Height of Feed dog Tool: 7.5mm nut driver, flathead screwdriver and gauge measurement for height of feed dog. Standard: Height of Feed dog is 0.9mm when it starts to move ~height of feed dog moves to highest position 1.1mm Adjustment: A.

  • Page 7: Transmission Of Feed Dog (Regulate)

    555QE Service Manual 5. Transmission of Feed dog Tool: 2.5mm hexagon screwdriver. Standard: Transmission of Feed dog is in between 0-1mm when needle is moved down from highest position. Check: Turn hand wheel to move needle to highest position, and check transmission of feed dog.

  • Page 8: Needle Clearance In Rotary Hook

    555QE Service Manual 6. Needle clearance in rotary hook. Tool: 2.0mm hexagon screwdriver. Standard: The distance between needle(HA-1 #14) and rotary shuttle sharp hook is 0.05～0.1mm Check: Move needle position to center by setting stitch width at 3.5 . Adjustment: A.

  • Page 9: Timing Of Rotary Hook

    GHE-1207 Service Manual 7. Timing of rotary hook. Tool: 2.5mm hexagon screwdriver and a specialized gauge of measurement. Standard: The needle is required to be at a proper position with rotary shuttle hook tip Check: A. Set Pattern No. at 002 (straight stitch i left positio ) or adjust stit h idth to 0 for left needle position when pattern No.

  • Page 10: Positioning Of Bobbin Case

    GHE-1207 Service Manual 8. Positioning of Bobbin case Tool: Phillips screwdriver. Standard: Distance is 1mm between bobbin case and stop shrapnel holder (C2900-023/730152) Adjustment: A. Open needle plate B. Loosen screw (A) of bobbin case stop plate (730151) on needle plate C.

  • Page 11: Upper Tension Dial

    GHE-1207 Service Manual 9. Upper Tension Dial Tool: Tension meter Standard: Tension range is 35～40g when Tension dial is set at level 4 Check: A. Set Tension Dial at level 4. B. Lift presser bar C. Threading the thread with tension meter D.

  • Page 12: Tension Of Bobbin Case

    GHE-1207 Service Manual 10. Tension of Bobbin case Tool: Tension meter and small flathead screwdriver. Standard: Tension range is 15～18g. Check: A. Open needle plate, and take bobbin case off. B. Threading with meter to check (see figure) Adjustment: A. When tension is too tight use small flathead screwdriver to turn the regulating screw (A) counter- clockwise until standard tension value.

  • Page 13: Auto Needle Threader

    GHE-1207 Service Manual 11. Auto Needle threader Tool: 1.5 mm hexagon screwdriver and flathead screwdriver Standard: Hook of Auto needle threader is correctly into needle eye to get thread through it. Check: A. Turn hand wheel to make needle raising to highest position. B.

  • Page 14: Open External Cover

    GHE-1207 Service Manual 12. Open External Covers A. Face cover, front cover, rear cover. B. Start to open face cover first before opening front cover and rear cover...

  • Page 15: Adjust Starting Point

    GHE-1207 Service Manual 13. Adjust starting point Check: (1) Power of machine is turned on. (2) Stepping motor will senses the start point when needle position is tuned to Upper or lower. Problem 1: Stepping motor does ’t have motion to sense the starting point or starting point is off standard position. Solution: Change PC-2 (11K23M) Main circuit board or Stepping Motors (128082) Problem 2: Pattern is sewn differently from standard.

  • Page 16: Location Of Circuit Boards

    GHE-1207 Service Manual 14. Location of Circuit boards Problem 1: LED Lamp cannot be lightened Solution: Change LED lamp (5K02W-07) Problem 2: LED display cannot be lightened/control button has no response. Solution: Change Display & control board (PC2-11K23) Problem 3: LED lamp and LED display cannot be lightened in the same time. Check: The power plug is connected completed well, and Power switch is turned [On], the a hi e does ’t ha e respo se.

  • Page 17: Circuit Cord Connections

    555QE Service Manual...

  • Page 18: Change Feeding Stepping Motor(128082)

    555QE Service Manual 16. Change feeding stepping motor (128082) 1. Open front and back cover 2. Loosen 3 screws (A, B and C) for disassembling the stepping motor. 3. Replace new motor on the feed motor plate, then secure it with screws.

  • Page 19: Auto Buttonhole Adjustment

    GHE-1207 Service Manual 17. Auto Buttonhole adjustment Problem 1: buttonhole presser foot is not sensed when you select button pattern and pull buttonhole lever down. Solution: 1. Open face cover 2. Loosen the screw of buttonhole switch case (128024), then adjust and move the switch case backward, tighten screw and test.

  • Page 20: Motor Belt Adjustment

    GHE-1207 Service Manual 18. Motor belt adjustment Problem: (1)When the tension of belt is loose the a hi e does ’t ru properly. Solution: 1. Loosen screw (A) for releasing the bracket of motor. 2. Bracket of motor can be moved downward or Upward until belt is in proper tension. 3.

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