Janome MC15000 Service Manual
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Janome MC15000 Service Manual

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SERVICE MANUAL
MC15000 (Ver.2.0)

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Summary of Contents for Janome MC15000

  • Page 1 SERVICE MANUAL MC15000 (Ver.2.0)

  • Page 2: Table Of Contents

    INDEX Changing External Parts Face cover .................................1 Belt cover ..................................1 Top cover ...................................2 Base plate ..................................3 Base cover .................................3 Bed cover ..................................3 Free arm cover ................................4 Front cover .................................5 Rear cover .................................6 Replacing Electronic Components Printed circuit board A ...............................7 Communication module ............................

  • Page 3: Changing External Parts

    Changing External Parts (1) 　 Face cover Face cover To remove: 1. Open the face cover. Disconnect the connector. 2. Remove the setscrews A (2 pcs.). Remove the face plate. To attach: 1. Follow the above procedure in reverse. Connector Belt cover To remove: 1.

  • Page 4: Top Cover

    Changing External Parts (2) 　 Top cover To remove: 1. Open the top cover. Remove the setscrew A. 2. Remove the setscrew B. 3. Close the top cover. Raise the carrying handle. Remove the setscrew C. 4. Detach the top cover for the machine. Be careful that the connector for the bobbin winding motor is still connected.

  • Page 5: Base Plate

    Changing External Parts (3 ) 　 Base plate To remove: 1. Remove the setscrews A (3 pcs.). 2. Remove the setscrews B (2 pcs.). 3. Remove the base plate. To attach: 1. Follow the above procedure in reverse. Base plate Base cover Base cover To remove:...

  • Page 6: Free Arm Cover

    Changing External Parts (4) Free arm cover To remove: 1. Remove the needle and presser foot holder. 2. Push down the needle plate release lever. Remove the needle plate. 3. Remove the bed cover (see page 3). 4. Remove the setscrew A and pin B. 5.

  • Page 7: Front Cover

    Changing External Parts (5) Front cover To remove: 1. Remove the belt cover and top cover (see page 1 and 2). 2. Loosen the setscrew (A, B, C, D, E and F). 3. Press down the rear cover through the holes (G and H) with a screwdriver to unlatch the front cover.

  • Page 8: Rear Cover

    Changing External Parts (6) Rear cover Face cover Connector To remove: 1. Remove the belt cover, top cover and base cover (see page 1, 2 and 3). 2. Open the face plate and disconnect the connector. 3. Loosen the setscrews A and B. 4.

  • Page 9: Replacing Electronic Components

    Replacing electronic components Printed circuit board A NOTE: Do not disconnect the connectors by pulling on cord. To disconnect the connectors, grasp the connector, not the cord. To remove: 1. Remove the front cover (see page 5). 2. Disconnect the connectors. Remove the setscrews A (4 pcs.) and printed circuit board A.

  • Page 10: Communication Module

    Symptom: The wireless LAN on/off function is grayed out and the network name and IP address are blank. When the machine is turned ON, MC15000 performs wireless LAN initialization according to either of the following procedures: a) An initialization according to the default setting value.
  • Page 11 Replacing electronic components Communication module (2) To remove: 1. Remove the the printed circuit board A from the machine (see page 7). Tune the printed circuit board A rear-side up. Hold the communication module lightly, and remove the nuts (2 pcs.). 2.

  • Page 12: Printed Circuit Board U1

    Replacing electronic components Printed circuit board U1 Printed circuit board U1 NOTE: Do not disconnect the connectors by pulling on cord. To disconnect the connectors, grasp the connector, not the cord. To remove: 1. Remove the top cover (see page 2). 2.

  • Page 13: Printed Circuit Board U2

    Replacing electronic components Printed circuit board U2 NOTE: Setscrew (A) Do not disconnect the connectors by pulling on cord. To disconnect the connectors, grasp the connector, not the Cord binder cord. To remove: 1. Remove the base plate (see page 2). 2.

  • Page 14: Printed Circuit Board K

    Replacing electronic components Printed circuit board K To remove: 1. Remove the front cover (see page 5). 2. Disconnect the connectors from the circuit board K. 3. Remove the setscrews (3 pcs), and the circuit board K. To attach: 1. Follow the above procedure in reverse. Circuit board K connection Printed circuit board A relay (30-pin)

  • Page 15: Printed Circuit Board F

    Replacing electronic components Printed circuit board F To remove: 1. Remove the front cover (see page 5). 2. Disconnect the connector A from the circuit board K. 3. Remove the setscrews (2 pcs), and the circuit board F. To attach: 1.

  • Page 16: Switching Power Supply Unit

    Replacing electronic components Switching power supply unit • Before removing 1. Remove the belt cover, top cover, front cover and the rear cover (see pages 1, 2 and 5). • Removing the auxiliary power supply unit case 2. Disconnect the connector of the auxilliary power supply Tie band unit from the printed circuti board A (see page 7).

  • Page 17: Usb Unit

    Replacing electronic components USB unit • Before removing 1. Remove the belt cover, top cover and the front cover (see pages 1, 2 and 5). • Removing the USB unit 2. Disconnect the connector of the USB board from the printed circuti board A (see page 7).

  • Page 18: Driving Motor

    Replacing electronic components Driving motor To remove: 1. Remove the belt cover, the top cover, the front cover and auxiliary power supply unit case (see page 1, 2, 5 and 13). 2. Disconnect the connector of the foot control from the printed circuti board A (see page 7).

  • Page 19: Thread Tension Unit

    Replacing electronic components Thread tension unit Thread tension unit To remove: 1. Remove the belt cover and the top cover (see page 1 and 2). 2. Remove the front cover (see page 5). 3. Disconnect the thread cut detection connector and the thread tension motor connecter from the printed circuit board U1 (see page 9).

  • Page 20: Mechanical Adjustment

    Mechanical adjustment Feed dog height The highest position of the feed dog should be between 0.80 and 0.90 mm from the surface of the needle plate. Zigzag foot A 1. Attach the zigzag foot A. Remove the bed cover (see page 3). 0.8 –...

  • Page 21: Needle Drop Position

    Mechanical adjustment Needle drop position When the straight stitch is selected, the needle should be positioned in the center of the needle plate hole. When the needle drop position is set at "0.0" and "9.0", the clearance between the side of the needle and the needle hole should be 0.2 mm or more.

  • Page 22: Hook Timing

    Mechanical adjustment Hook timing The amount of ascending travel of the needle bar from its lowest position to the position (Needle drop position 0.0) where the tip of the rotary hook exactly meets the right side of the needle should be 3.70 to 4.00 mm (Needle drop position 0.0) 1.

  • Page 23: Needle Bar Height

    Mechanical adjustment Needle bar height The distance between the upper edge of the needle eye and the hook race should be in the range of 1.6 to 2.0 mm when the tip of the hook meets right side of the needle in the needle drop position "0.0" as the needle ascends from its lowest position. (Needle drop position 0.0) Tip of hook meets the 1.

  • Page 24: Clearance Between Needle And Tip Of Rotary Hook

    Mechanical adjustment Clearance between needle and tip of the rotary hook The clearance between the needle and the point of hook should be -0.1 to +0.05 mm. 1. Remove the top cover (see page 2). 2. Remove the presser foot, the needle plate and the bobbin Needle plate hole holder.
  • Page 25 Clearance adjustment 2 1. Remove the bed cover (see page 3). 2. Loosen the setscrews A, B and C. Tighten the setscrew C lightly. 3. Turn the handwheel toward you. Adjust the clearance between the needle and the tip of the rotary hook, by moving the hook base plate up or down, to adjust the clearance between the needle and the tip of the hook.

  • Page 26: Backlash Between Hook Drive Gear And Lower Shaft Gear

    Mechanical adjustment Backlash between hook drive gear and lower shaft gear The rotary play of the hook should be 0.8 mm or less when the tip of rotary hook is within the width of feed dog. 1. Remove the base cover and bed cover (see page 2 and 3). 2.

  • Page 27: Upper Shaft Shield Plate Position

    Mechanical adjustment Upper shaft shield plate position When the machine is set for zigzag stitch, the needle should start to swing 7.2 to 8.2 mm above the surface of the needle plate. To check: Needle #14 1. Attach the needle #14. 2.

  • Page 28: Upper Thread Tension

    Mechanical adjustment Upper thread tension The standard upper thread tension should be 59 to 67 grams when the machine is set for pattern No.1 and the thread tension is set at "3.4", measured with a #50 polyester thread being pulled at approximately 110 mm/sec. in the direction of arrow. 1 Turn the power switch ON while pressing the Start/Stop button and the Reverse stitch button to enter the factory setting mode.

  • Page 29: Tension Release Mechanism

    Mechanical adjustment Tension release mechanism When the presser foot lifter is raised, the tension release mechanism should work correctly. 1 Remove the belt cover and top cover (see pages 1 and 2). 2. Remove the front cover (see page 5). Convex is NOT set at tension release claw 3.

  • Page 30: Needle Threader Holder (Threader Hook Replacement)

    Mechanical adjustment Needle threader holder (threader hook) replacement If the hook of the needle threader holder is damaged, change or adjust the part as follows: To remove: 1. Loosen the setscrew A to remove the needle threader holder. 2. Prepare the replacement parts (order them as necessary). q 858-266-009: Link plate 2 w 862-627-005: Hook holder (unit) e 862-626-004: Threader plate (unit)

  • Page 31: Needle Threader Hook Position Adjustment

    Mechanical adjustment Needle threader hook position adjustment The threader hook comes out through the needle eye from behind when the needle threader button is pressed. Check: 1. Turn the power switch ON while pressing the Start/Stop button and the Reverse stitch button to enter the factory setting mode.

  • Page 32: Needle Thread Motor Replacement

    Mechanical adjustment Needle thread motor replacement If the needle thread motor is damaged, change the part as follows: Motor cover 1. Remove the top cover (see page 2). Disconnect the connector form the face cover. Connecter 2. Loosen the setsrew A. 3.

  • Page 33: Thread Drawing Lever

    Mechanical adjustment Thread drawing lever The standard height of the thread drawing lever from the surface of bobbin holder should be in the range of 5.5 – 6.0 mm. Thread drawing lever 1. Remove the presser foot, the needle plate and the bobbin Hook race holder.

  • Page 34: Upper Feed Dog

    Mechanical adjustment Upper feed dog (1) The clearance between the upper feed link shaft and upper feed lower shaft should be 2.5 mm when the upper feed adjusting dial is set to "0". Needle up/down button To check: Drop feed key 1 Remove the belt cover and base cover (see page 1 and 2).
  • Page 35 To adjust: View from the base cover side 1 Loosen the setscrew on the upper feed adjusting arm (1). Adjust the clearance between the upper feed link shaft and upper feed lower shaft to 2.5 mm. Upper feed link shaft Upper feed lower shaft rear arm Upper feed lower shaft Setscrew...
  • Page 36 Mechanical adjustment Upper feed dog (2) The clearance between the dual feed foot and upper feed dog should be 4 mm when the stitch length is set at "0". * Check the upper feed dog (1) (see page 31) before this adjustment. To check: Presser foot lifter button 1 Attach the dual feed foot (see page 35).

  • Page 37: Attaching The Dual Feed Holder

    Attaching the dual feed holder: Attach the presser foot to the dual feed holder before attaching it. Presser foot lifter 1. Turn the power switch on. Press the lockout key to lockout the machine before replacing the foot holder. Needle Foot holder 2.
  • Page 38 Mechanical adjustment Upper feed dog (3) The tip of the needle height should be 0 to 1 mm above the surface of the needle plate when the toe of the dual feed foot touch the needle plate. To check: Presser foot lifter button Fig.
  • Page 39 To adjust: 1. Turn the power switch on and select ( ) stitch. Setscrew (Be sure that the machine is not locked.) Press the drop feed key to drop the feed dog. Turn the upper feed adjusting dial to set the dial at "0". Press the presser foot lifter button to lower the presser foot.

  • Page 40: Buttonhole Lever Adjustment

    Mechanical adjustment Buttonhole lever adjustment 1 Turn the power switch ON while pressing the Start/Stop button and the Reverse stitch button to enter the factory setting mode. Press "BH Sensor" key. 2. Open the face cover. Lower the Buttonhole lever. Loosen the setscrew of the buttonhole lever guide.

  • Page 41: Thread Cutter

    Mechanical adjustment Thread cutter The distance between the end of thread cutter plate slit and the edge of moving cutter should be in the range of 0.4 to 1.2 mm. To check: 1. Remove the bed cover and free arm cover (see page 3, 4). 2.

  • Page 42: Presser Bar Lifter Position

    Mechanical adjustment Presser bar lifter position The clearance between the presser foot and the surface of the needle plate should be 6 mm when the presser foot is raised. The presser foot (zigzag foot A) should be parallel to the slot of the feed dog teeth when attached. To adjust: Presser foot lifter button 1.

  • Page 43: Presser Foot Lifter Stopper Position

    Mechanical adjustment Presser foot lifter stopper position (1) The distance between the presser foot spring release base and the presser foot lifter should be in the range of 39.4 mm to 39.8 mm when the presser foot is raised with the presser foot lifter. Preparation: Presser foot lifter button 1.
  • Page 44 Mechanical adjustment Presser foot lifter stopper position (2) Carrying handle supporter 6. Remove the setscrews D. Remove the thread motor unit from the carrying handle supporter. Be careful that the thread motor unit is still connected with the cables. (You may put the piece of soft fabric at the top of the machine and place the motor unit on it while working, or disconnect the needle threader motor cable from the printed circuit board U1 and remove them together.)

  • Page 45: Presser Foot Lifter Stopper Position

    Mechanical adjustment Presser foot lifter stopper position (3) To adjust: 1. Turn the handwheel toward you to lower the needle. Raise the presser foot lifter. Loosen the hexagonal socket screw of the presser foot lifter stopper from the front side of the machine. Front side of the machine 2.

  • Page 46: Automatic Presser Foot Lifter Initializing Sensor Position

    Mechanical adjustment Automatic presser foot lifter initializing sensor position To adjust: 1. Remove the top cover. 2. Turn the power switch ON while pressing the Start/Stop button and the Reverse stitch button to enter the factory setting mode. Press "Foot Sensor" key. Reverse stitch button Start/Stop button...

  • Page 47: Presser Bar Height

    Mechanical adjustment Presser bar height To adjust: 1. Turn the power switch ON while pressing the Start/Stop button and the Reverse stitch button to enter the factory setting mode. Press "Foot Up/Down" key. 2. Attach the foot holder lightly (Do not tighten the thumbscrew.).

  • Page 48: Embroidery Foot Height

    Mechanical adjustment Embroidery foot height The distance between the embroidery foot and the surface of the needle plate should be in the range of 1.7 mm to 1.9 mm when the presser bar is lowered. To adjust: 1. Attach the embroidery foot (P). 2.

  • Page 49: Presser Foot Lifter Switch

    Mechanical adjustment Presser foot lifter switch Presser foot lifter button To check: 1. Attach the zigzag foot (A) . 2. Turn the power switch ON while pressing the Start/Stop button and the Reverse stitch button to enter the factory setting mode. Press "Foot Sensor"...

  • Page 50: Stretch Stitch Balance

    Mechanical adjustment Stretch stitch balance When the stretch pattern "8" is sewn 8 times with the stretch stitch balancing dial at the standard setting mark, the length of five of stretch patterns should be in the range of 33 to 39 mm. Fig.

  • Page 51: Knee Lifter

    Mechanical adjustment Knee lifter To adjust: 1. Attach the knee lifter. 3. Turn the power switch ON while pressing the Start/Stop button and the Reverse stitch button to enter the factory setting mode. Press "Knee lifter" key. 3. Attach the knee lifter. Press "MEM1"...

  • Page 52: Remaining Bobbin Thread Sensor

    Mechanical adjustment Remaining bobbin thread sensor 1. Prepare the empty bobbin (diameter: 8.4 mm) and the gauge bobbins (diameter: 12.5 mm and diameter: 18.9 mm). 2. Remove the presser foot and needle plate. (see page 4) Reverse * You may use a fabric to prevent damaging the stitch button needle plate.

  • Page 53: Needle Plate Sensor

    Mechanical adjustment Needle plate sensor Fig. 1 To remove: Needle plate sensor 1. Remove the base cover, bed cover and the free-arm cover (see page 2 to 4). 2. Disconnect the connector from the needle plate sensor switch from the printed circuit board U2 (see page 10). 3.
  • Page 54 4. Turn the power switch ON while pressing the Start/Stop button and the Reverse stitch button to enter the factory setting mode. Press "Other sensor" key. 5. Be sure that "Straight" indicates "L", and "ZigZag" indicates "H" when the needle plate is attached. Reverse 6.

  • Page 55: Y-Carriage Play Adjustment

    Mechanical adjustment Y-carriage play adjustment There should be no play in the direction of arrow A (see fig. 1). Fig. 1 1. Push down the lever to open the Y-carriage. X-carriage 2. Remove the cap under the embroidery unit (see fig. 2). 3.

  • Page 56: Cloth Guide Start Position

    Mechanical adjustment Cloth guide start position The distance between the cloth guide and center needle position should be 15 mm when the cloth guide is at the start position. 1. Turn the power switch off. Attach the embroidery hoop. (Do not open the Y-carriage.) 2.

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