Janome HD9 Service Manual
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Janome HD9 Service Manual

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First Edition: 16 October 2018
SERVICE MANUAL
MODEL: HD9

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Summary of Contents for Janome HD9

  • Page 1 First Edition: 16 October 2018 SERVICE MANUAL MODEL: HD9...

  • Page 2: Table Of Contents

    INDEX Replacing the External Parts Face Plate .............................. 1 Top Cover ............................... 1 Belt Cover ............................... 1 Motor Cover ............................1 Base ............................... 1 Mechanical Adjustment Needle Bar Height ...........................2 Presser Bar Height ..........................2 Feed Dog Height .............................3 Feed Dog Alignment ..........................3 Feed Cam Timing ............................4 Feed Lifting Cam Timing..........................5 Needle to Hook Timing ..........................6...

  • Page 3: Replacing The External Parts

    Replacing the External Parts 1. Face Plate Remove the setscrew (4x10) q and washer w. Remove the face plate e. 2. Top Cover Remove the setscrews (4x25) r. Lift the top cover t and pull out the motor connector y. Remove the top cover. 3.

  • Page 4: Mechanical Adjustment

    Mechanical Adjustment 1. Needle Bar Height Remove the face plate. Turn the handwheel to bring the needle bar q to the lowest position. Loosen the setscrew w. Move the needle bar q up or down and match the upper hairline e with the bottom edge of the needle bar bushing r.

  • Page 5: Feed Dog Height

    3. Feed Dog Height When the feed dog is fully raised the height should be 0.8 0.8 to 1.0mm to 1.0 mm above the needle plate. Set the stitch length dial at 6 (Maximum). Turn the handwheel to bring the feed dog to the highest position.

  • Page 6: Feed Cam Timing

    5. Feed Cam Timing To Check: Lower the needle bar by turning the handwheel until the point of the needle is 17.5 mm above the upper surface of the needle plate q. The feed dogs should not move when moving the reverse stitch lever up and down.

  • Page 7: Feed Lifting Cam Timing

    6. Feed Lifting Cam Timing To check: Lower the needle bar until the point of needle is 0.4 mm below the needle plate q. The top of the feed dogs w should be 0 to 0.1 mm above the needle plate. 0.4mm To adjust: 0 to 0.1mm...

  • Page 8: Needle To Hook Timing

    7. Needle to Hook Timing Remove the needle plate. Loosen the 3 setscrews q. Pull out the hook race very slightly (less than 0.5 mm). Raise the needle bar from the lowest position until the lower hairline w of the needle bar matches the edge of the needle bar bushing e.

  • Page 9: Hook Stopper Position

    9. Hook Stopper Position Remove the needle plate, base and feed dog. Loosen the setscrew q and move the hook stopper w so that the center of the needle e is located between the center of the hook stopper r and outer side of the hook stopper spring t.

  • Page 10: Bobbin Winder Stopper

    10. Bobbin Winder Stopper The amount of thread wound on the bobbin should be 20 to 22 mm in diameter. Loosen the setscrew q. Turn the bobbin winder stopper w to adjust the thread amount. • If the amount is too much, turn the stopper in the direction A.

  • Page 11: Check Spring Stroke

    11. Check Spring Stroke The amount of the needle thread supplied by the check spring should be 11 to 15 mm. Thread the machine up to the thread guide q and lower the presser foot. Lower the needle bar to the lowest position. Hold the thread end and mark the point w on the thread beside the thread guide.

  • Page 12: Knee Lifter Lever

    13. Knee Lifter Lever The presser foot rises 7 to 8 mm when it is fully raised with the knee lifter. Remove the base and lay the machine on its back. Loosen the nut q on the knee lifter lever w slightly and turn the adjusting screw e to adjust the height.

  • Page 13: Needle Threader

    14. Needle Threader To remove: Remove the face plate. Pull the threader q out from the threader shaft w. To attach: Align the groove e of the threader with the pin r on the threader shaft. Push the threader up until it snaps in place.

  • Page 14: Replacing The Electronic Components

    Replacing the Electronic Components 1. Location of the Electronic Components Bobbin winder motor Slide volume Bobbin winder switch Printed circuit board A Printed circuit board F Upper shaft sensor Driving motor Machine socket Thread cutter switch Capacitor Push - pull solenoid Power transformer Printed circuit board MS 2.

  • Page 15: Internal Wiring

    3. Internal Wiring To prevent the internal wirings from contacting the moving parts or being caught in the joint of the external parts, the internal wirings should properly be routed and secured as illustrated. Motor cord Motor sensor cord Machine socket cord (primary) Machine socket cord (secondary) Push-pull solenoid cord Capacitor cord...

  • Page 16: Circuit Board-A

    4. Circuit Board-A To remove: Remove the top cover. Pull out connectors from the printed circuit board A. Remove the cords from the cord clips q. Remove the setscrews w and the printed circuit board A case e. Pull out the connectors under the case lid. Remove setscrews r and printed circuit board A.

  • Page 17: Circuit Board-F And Slide Volume

    5. Circuit Board-F and Slide Volume To remove: Removed the top cover. Pull out the printed circuit board F connector q, slide volume connector w from the printed circuit board A e. Loosen the 3 setscrew (A). Remove the ornamental panel r. Remove the 3 setscrews (B) and remove the printed circuit board F t from the panel.

  • Page 18: To Replace The Printed Circuit Board Ud

    6.To Replace the Printed Circuit Board UD Cord binder To remove: z Remove the top cover, belt cover and base. x Remove the cord binder below the handwheel. c Disconnect the connector of the thread cutter from the printed circuit board A. Printed circuit board A Remove the setscrew A and cord guide.

  • Page 19: Driving Motor

    7. Driving Motor To remove: Remove the belt cover and motor cover. Pull out the motor sensor connector q. Pull out the motor connector w, while pushing the connector lock e. Remove the nuts r and driving motor t. NOTE: Do not disconnect the connectors by pulling on cord.

  • Page 20: Driving Motor (Continued)

    8. Driving Motor (continued) To attach: Install the driving motor q to the motor bracket w and attach the motor belt e. Tighten the nuts r firmly. Loosen the setscrews t slightly and move the motor up or down to adjust the motor belt tension. The belt should deflect 7 to 9 mm when applying 300 grams of load to the middle of the belt.

  • Page 21: Needle Stop Position

    9. Needle Stop Position Turn the power switch q on while pressing the Up/ Down needle position button w and bobbin winding button e at the same time. Remove the top cover. Lower the needle bar by turning the handwheel until the needle point is 18.7 mm above the upper surface of the needle plate r.

  • Page 22: Power Transformer

    10. Power Transformer To remove: Remove the top cover and motor cover. Remove the printed circuit board A case and pull out the transformer connectors (primary and secondary) from the printed circuit board A. Remove the driving motor. Remove the setscrew q and cord binder w. Remove the setscrews e and transformer r.

  • Page 23: Led And Printed Circuit Board Ud1

    12. LED and Printed circuit board UD1 To replace: Remove the face plate and top cover. Remove the setscrew q. Pull out the connectors w. Open the LED holder e and remove the LED r. To attach: Follow the procedure above in reverse. Printed circuit board UD1: To replace: Remove the face plate and top cover.

  • Page 24: Thread Cutter Blade

    Adjustment of the Thread Cutter Mechanism 1. Thread Cutter Blade To replace: Remove the needle plate and base. Remove the static cutter blade. Remove the hinge screw q and thread cutter blade w. Attach the new thread cutter blade and secure it with the hinge screw e.

  • Page 25: Thread Guide Plate

    2. Thread Guide Plate Remove the needle plate. Loosen the flat screw q and adjust the position of the thread guide plate w. The left inner edge e of the thread guide plate should be approximately 1.4 mm from the center of the needle drop position r and the back inner edge t of 2.7 mm the thread guide plate should be approximately 2.7...

  • Page 26: Static Cutter Blade

    3. Static Cutter Blade Remove the needle plate and base. Lower the needle bar to the lowest position. Turn the handwheel toward you while pushing up the link body q to engage the thread cutter blade w and bring it under the static blade e. Loosen the setscrews r and adjust the position of the static cutter blade e so that the distance between the center of the needle drop position t and the static...

  • Page 27: Needle To Cutter Cam Timing

    4. Needle to Cutter Cam Timing Remove the base. Remove the setscrews q and gear cover w. Lower the needle bar to the lowest position. Turn the handwheel toward you to raise the needle bar while pushing up the link body e. 10.5 mm Continue to turn the handwheel until the thread drawing arm r starts to move to the right.

  • Page 28: Thread Drawing Lever

    5. Thread Drawing Lever Remove the base. Loosen the setscrew q and free the stopper w. Turn the the handwheel toward you to raise the needle bar from the lowest position until the needle point is 10.5 mm above the upper surface of the needle plate.

  • Page 29: Auto Tension Release

    6. Auto Tension Release Turn the handwheel toward you to raise the needle bar until the needle point is just above the needle 0.5 to 1.0mm plate. Set the tension dial at 4 and push the solenoid disk q fully to the right. The tension disks should open 0.5 to 1 mm.

  • Page 30: Thread Cutter Troubleshooting

    Thread Cutter Troubleshooting The needle thread is not cut. The static cutter is dull. Replace or grind the static cutter blade. The static cutter blade is Adjust the position of the static cutter blade position out of position. (see page 24). Skipped stitch before thread cutting.

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