Singer Legacy SE300 Service Manual
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Singer Legacy SE300 Service Manual

Singer Legacy SE300 Service Manual

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Legacy
™
Legacy
™
Service Manual
SE300
SE340
104 73 54-26
28 Aug 2015

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Summary of Contents for Singer Legacy SE300

  • Page 1 Legacy SE300 ™ Legacy SE340 ™ Service Manual 104 73 54-26 28 Aug 2015...

  • Page 2: Table Of Contents

    Table of contents 1. MOTOR BELT TENSION .......................3 2. TIMING BELT TENSION .......................3 3. BACKLASH OF HOOK GEAR....................4 4. TIMING OF THE UPPER AND LOWER SHAFT ..............5 5. GAP BETWEEN NEEDLE AND HOOK .................6 6. SETTING THE FEED DOG ....................7 7.

  • Page 3: Motor Belt Tension

    Settings 1. MOTOR BELT TENSION If the motor belt tension is too tight or too loose, machine will not run smoothly. Adjustment 1. Remove the front and rear enclosure. 2. Loosen the 2 screws (a, b) 3. Move the motor up or downward and tentatively tighten the screws.

  • Page 4: Backlash Of Hook Gear

    Settings 3. BACKLASH OF HOOK GEAR If there is too much play on the hook gear on the turning direction, it may be the cause for machine 0.1-0.3 mm not to sew properly and/or making excessive sewing noise. Check 1. Free play at the tip of hook may be 0.1-0.3 mm. Note: To do this check on least 3 different spots during the revolution of the hook by turning the handwheel.

  • Page 5: Timing Of The Upper And Lower Shaft

    ネジＡ Settings 4. TIMING OF THE UPPER AND LOWER SHAFT The upper and lower shaft must be positioned cor- rectly as follows. Check 1. Remove the front enclosure. 2. Turn the handwheel toward you until the needle is its lowest point. At this time, the mark (a - very small molded line on edge) on the lower shaft timing pulley must be facing toward you.

  • Page 6: Gap Between Needle And Hook

    Settings 5. GAP BETWEEN NEEDLE AND HOOK f the needle hits against the hook, it may be the cause of needle and thread breakages. If the gap between needle and hook is too big, it will cause to skip stitches. Check and adjust as follows: Prior to make this adjustment, check that the needle is not bent and the needle is inserted correctly.

  • Page 7: Setting The Feed Dog

    Settings 6. SETTING THE FEED DOG Check 1. Slideways the feed dog should be symmetrically set in relation to the needle plate slot. Adjustment 1. Remove the presser foot and holder. 2. Remove the needle plate. 3. Loosen the 2 screws tightening the feed dog. 4.

  • Page 8: Height Of The Feed Dog

    Settings 7. HEIGHT OF THE FEED DOG If the feed dog does not come up over the needle plate enough, it will result in insufficient and/or uneven feed of fabrics. Check 1. The feed dog should come up over the needle 0.9-1.0 mm plate (0.9-1.0 mm) when its highest position. If it does not come up enough, adjust as follows: Adjustment 2 View from backside...

  • Page 9: Height And Direction Of Presser Foot

    Settings 8. HEIGHT AND DIRECTION OF PRESSER FOOT Check 1. The height of the presser foot from the needle plate should be 6.5 mm when it is lifted up. 2. The presser foot should be facing frontward (the edge of foot is parallel with the feed dog slot on 6.5 mm needle plate).

  • Page 10: Needle Plate And Needle Position

    Settings 9. NEEDLE PLATE AND NEEDLE POSITION No. 1 Calibration Point No. 2 No. 3 Check 1. Remove the face plate. 2. Start the service program. ( See page 22) 3. In menu 1, Press Key No 2 (Step motor will move the calibration point.) 4.

  • Page 11: Position Of Needle Point Limiting Plate

    Settings 10. POSITION OF NEEDLE POINT LIMITING PLATE The needle point limiting plate is protecting the needle hits the needle plate. Check and adjust as follows. Check 0.25mm 1. Set the pattern to [Straight stitch No.0] and set the needle position to the extreme right (3.5). 2.

  • Page 12: Height Of Needle Bar

    Settings 11. HEIGHT OF NEEDLE BAR Height of needle bar could be the cause for stitches to skip. Check as the following procedures. Check 1. Set the pattern to [Straight stitch No.0] which is straight stitch on center needle position. 2.

  • Page 13: Height Of Needle Threader

    Settings 12. HEIGHT OF NEEDLE THREADER If the height of needle threader is not correct, the hook on threader will not enter the needle eye. Check and adjust as follows: Check 1. Insert a new #70 needle. 2. Raise the needle to its highest point by turning the handwheel.

  • Page 14: Timing Of The Hook

    Settings 13. TIMING OF THE HOOK Check 1. Set a new needle size 90 universal into the ma- chine. 2. Remove the needle plate and bobbin holder. 3. Set the pattern at [Straight stitch No.0] (Straight stitch on center needle postion.) 4.

  • Page 15: Adjusting The Feed Regulator

    Settings 14. ADJUSTING THE FEED REGULATOR Check 1. Remove the front cover. No. 1 2. Take the front cover and connected it. Lay it on top No. 2 of the casting. No. 3 3. Go to the service program and in menu 2. Press the Key No.

  • Page 16: Adjusting The Forward Reverse Stitch

    Settings 15. ADJUSTING THE FORWARD REVERSE STITCH When stretch stitch sewing, the lengths of the for- ward and reverse stitches should be the same. Check and adjust as follows. • We recommend checking “Height of the Feed-dog (Sec. 4)” before you make this adjustment. Check 1.

  • Page 17: Adjusting The Lower Thread Tension

    Settings 16. ADJUSTING THE LOWER THREAD TENSION Check 1. Insert a full bobbin into the bobbin case, use nor- mal polyester thread. 2. The thread tension spring of the bobbin case shall give a resistance of 17g (Polyester #50 White ) when pulling the thread slowly.

  • Page 18: Upper Thread Tension

    Settings 17. UPPER THREAD TENSION No. 1 STEP 1 No. 2 Check No. 3 No. 4 1. Remove the thread tension cover. No. 5 2. In service program, Menu 1, press the Key No. 4. 3. At this time, the projection (a) should be touching the stopper (b) of the bracket.

  • Page 19: Flatness Of The Base

    Settings 18. FLATNESS OF THE BASE Adjustment 1. Remove the Embroidery unit. 2. Place the machine on flat stable table. 3. Adjust the height of the rubber feet (a, b) by turn- ing the adjusting center screws (a, b) so that the base will be stabilized.

  • Page 20: Adjustments For Buttonhole Lever Position

    Settings 19. ADJUSTMENTS FOR BUTTONHOLE LEVER POSITION Check 1. If the machine dose not sew even with the but- tonhole lever all the way down, it means that the buttonhole lever is not positioned properly. Also, if the buttonhole lever is not positioned properly, the machine will sew buttonhole as shown or incor- rectly.

  • Page 21: Bobbin Winder

    Settings 20. BOBBIN WINDER BOBBIN WINDS Adjustment If bobbin winds unevenly, adjust as follows: 1. If bobbin winds as shown, turn the screw (a) to the left (-). 2. If bobbin winds as shown, turn the screw (a) to the right (+).

  • Page 22: Service Program

    Service Program Service program Embroidery mode In order to facilitate the checking and setting of the different functions of the machine, there is a service Push program. Sewing mode Slide Push Press Turn on Handling Enter the service program by: 1.

  • Page 23: Service Menu 1 - Step Motor

    Service Program Service menu 2 Service menu 1 - Step Motors 2 - Step Motors 1 Entering service menu 2. 1. Enter the service program by pushing bobbin stopper to the right and pressing the “ - “ button 1. Press button “ ”.

  • Page 24: Service Menu 3 - Display Test, Sensor Test, Hardkey Test

    Service Program Service menu 3 2. Contrast adjustment Set the default contrast of the machine. - Display test, Sensor test, The setting interval is between -4 to 4 in steps of 1 and the value is shown above the contrast icon. Hardkey test The value shall be adjusted by pressing the –...
  • Page 25 Service Program 2. Cut sequence, Thread cut sensor 2. One step buttonhole sw. When these buttons are used, it shall be a possible This view shall show the current status for the one to run the cut sequence in steps. Step 0 shall be the step buttonhole switch.
  • Page 26 Service Program 6. Hardkey test 3. Togle LED on/off When the keyboard test is active, the keys listed in All of the LEDs on the left keypad (sewing head the display shall be pressed one at a time. When a keypad) light up.

  • Page 27: Service Menu 4 - Tension, Test Program

    Service Program Service menu 4 No. 5 Test pattern # 5 : The machine sews Zig-zag 4x6 - Tension, Test Pattern No. 6 Test pattern # 6 Entering service menu 4. The machine sews Zig-zag 2x3mm. 1. Press button “ ”. 2. The display shows the service menu 4 according No. 7 to below picture. Test pattern # 7 3.

  • Page 28: Service Menu 5 - Timers

    Service Program Service menu 5 - Timers Entering service menu 5. 1. Press button “ ”. 2. The display shows the service menu 5 according to below picture. a. Total on time = Indicates how many hours and minutes the machine has been switched on. b.

  • Page 29: Embroidery Service Menu 1 - Info

    Service Program Embroidery Service menu 1 1. Belt tension test : Test the belt tension for booth x- and y-motor - Info Is used to test the belt tension for booth x- y-motor. By pressing the , switches to 3 functions: 1. Attach the embroidery unit. 2. Enter the embroidery service program by pushing off (idle mode), belt -x, belt -y. Each motor moves bobbin stopper to the right and pressing the “...

  • Page 30: Embroidery Service Menu 3 - Test Embroidery

    Service Program Embroidery Service menu 3 Bobbin winder When the bobbin winder switch is the state of bobbin - Test embroidery winder mode by pushing bobbin stopper to the right, LCD will indicate the bobbin winder mode. Press the Start/Stop button on the LCD to start winding. You Entering embroidery service menu 3.

  • Page 31: Embroidery Service Menu 4 - Thread Tension

    Service Program Embroidery Service menu 4 - Thread tension Entering embroidery service menu 4. 1. Press the button “ ”. 2. The display shows the service menu 4 according to below picture. Step 1 By pressing the Mechanical setting/ adjustment point SET button, machine thread tension will go to mechanical adjustment point.

  • Page 32: Electrical Parts Connection

    Service Program Electrical Parts Connection a. LED Board Assy.(CN18) k. Thread Cutter Assy.(CN8) b. Thread Check Spring Cord(CN1) l. Tension Release Pulse Motor(CN7) c. Presser Foot Switch Assy.(CN4) d. Bobbin Winder Switch Assy.(CN3) e. Display Board Assy.(CN11) f. Power Circuit Unit(CN14) g.

  • Page 33: Removing The Exterior Parts

    Covers REMOVING THE EXTERIOR PARTS Remove the embroidery unit ar first. To remove the exterior parts, remove from A to H. A. Light Cover 1. Remove the screw cap (a) and screw. 2. Open the top cover (G). 3. Remove the screw (b). 4. Loosen the screw (c) with 2.5 mm hex. wrench located inside of light cover. View from downward 5. Loosen the screw (d).

  • Page 34: Thread Tension Cover

    Covers 6. Put your finger on the e and pull it toward you. 7. Release the hook-f. 8. Remove the light cover. B. Thread Tension Cover 1. Remove the screw cap (a) and screw. 2. Remove the thread tension cover. C. Needle Plate 1. Raise the presser foot and remove it. 2.

  • Page 35: Base

    Covers D. Base 1. Tilt the machine backward and remove the 10 set screws (a-j). NOTE: Note the screw type and position. 2. Remove the base. E. Front Enclosure 1. Remove the 2 screws (a, b). 2. Loosen the screw (c). 3.

  • Page 36: Unit Cover

    Covers 5. Pull up the front enclosure to come off the hook-f. Pull the enclosure to the left and come off the hook-g. 6. Pull the enclosure toward you and come off the hook-h. 7. Pull up the both black parts located on the connector (i) and pull off the cable.

  • Page 37: Top Cover

    Covers 4. Remove 2 connectors (c, d). G. Top cover 1. Pull the top cover to both right and left side hinges toward outside, remove the top cover. H. Rear Enclosure 1. Disconnected the 2 connectors (a, b) from the machine.

  • Page 38: Replacing The Exterior Parts

    Covers REPLACING THE EXTERIOR PARTS H. Rear Enclosure 1. Lower the presser foot lifter. 2. Replace the rear enclosure. 3. Replace the 3 screws (c, d, e), Replace the cap. 4. Connect the connecter so that the hook (a, b) will fit into place.

  • Page 39: Unit Cover

    Covers F. Unit Cover 1. Replace the unit cover so that the hook-b will fit into place. 2. Replace the screw (a). 3. Replace 2 connectors (c, d). E. Front Enclosure 1. Connect the cable to the connector (i) as follows. Pull up the both black parts located on the connector (i) lightly.

  • Page 40: Base

    Covers 3. Replace the screw (d). 4. Replace the screw (c). 5. Replace the screw (a, b). D. Base 1. Tilt the machine backward. 2. Replace the base and retighten the 10 base set screws (a-j). NOTE: The 2 screws (d, g) have the rubber foot (k).

  • Page 41: Needle Plate

    Covers C. Needle Plate 1. Insert the hook of needle plate to the machine. 2. Retighten the screws (a, b). B. Thread Tension Cover 1. Remove the screw cap (a), remove the screw. 2. Remove the thread tension cover. A. Light Cover 1.
  • Page 42 Covers 2. Retighten the screw (d). 3. Retighten the screw (c). 4. Replace the screw (b). 5. Replace the screw (a).

  • Page 43: Embroidery Unit Removing The Exterior Parts

    Embroidery Unit EMBROIDERY UNIT REMOVING THE EXTERIOR PARTS To remove the exterior parts, remove from A to D. A. Drawer 1. Until stopping, pull the drawer and go to the order 2. 2. While pulling up upper side (a), pull the drawer to come off the hook-b,c. Remove the drawer. B.

  • Page 44: Y Carriage Cover B

    Embroidery Unit 6. Pull up the cover and slide it and pull it until stopping. 7. Pick up with the fingers the edge of the cover, slide it, remove it. C. Y carriage cover B 1. Turn the embroidery unit over. (reverse) 2. Remove the screw (a). 3. Remove the X carriage cover B. D.

  • Page 45: Embroidery Unit Replacing The Exterior Parts

    Embroidery Unit EMBROIDERY UNIT REPLACING THE EXTERIOR PARTS C. Y carriage cover B 1. Turn the embroidery unit over. (reverse) 2. The hook (a) will fit into place. 3. Tentatively tighten the screw (b). D. Y carriage cover A 1. Turn the embroidery unit over. (obverse) 2. The hook (a) will fit into place. 3.
  • Page 46 Embroidery Unit 2. Pick up with the fingers the edge of the cover, slide it until stopping. 3. Slide the cover by pushing the position of the mark and The hook (b) will fit into place. 4. Push the carriage (c) to return the origin position.

  • Page 47: Drawer

    Embroidery Unit 5. Turn the embroidery unit over. (reverse) 6. Replace the 7 screws. A. Drawer 1. The hook (a,b) will fit into place by pulling upper side (a) and replace it.

  • Page 48: Belt Tension Of X, Y Carriage

    Embroidery Unit Belt Tension of X, Y Carriage If the belt tension of X, Y carriage is too loose, the step motor gear may spined out. The belt is too tight, the carriage moves difficulty. Check 1. Attach the embroidery unit to the machine and start the embroidery service program, Menu 2. (Page 29) 2.

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