Brother LS-2150 Service Manual
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Brother LS-2150 Service Manual

Brother LS-2150 Service Manual

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SERVICE MANUAL FOR
LS-2220 LS-2150
LS-2720 LS-2125i
LS-2820 LS-2125b
LS-2920 SL-7
LS-2320 JS-23
LS-2725 VX-1435
LS-2825 X-5
LS-1520 LX-3125
LS-2020 LS-3125
LS-2125
LS-2129
LS-2130
LS-3000
LS-5000
2.2001.
1.2011.

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Summary of Contents for Brother LS-2150

  • Page 1 SERVICE MANUAL FOR LS-2220 LS-2150 LS-2720 LS-2125i LS-2820 LS-2125b LS-2920 SL-7 LS-2320 JS-23 LS-2725 VX-1435 LS-2825 X-5 LS-1520 LX-3125 LS-2020 LS-3125 LS-2125 LS-3000 LS-2129 LS-5000 LS-2130 2.2001. 1.2011.
  • Page 2 • This service manual was compiled for use when repairing the LS-2220, 2720 Zigzag Stitch Sewing Machines. • Use this manual, together with the Parts Catalog, when making repairs. • This manual was written based on the most up-to-date product specifications at the time of printing. Some machine specifications may have been changed to improve the quality of the product.

  • Page 4: Table Of Contents

    CONTENTS Removing order of covers ............................ 1 Clearance between the needle and the shuttle hook point (Shuttle race position)........2 Clearance between the shuttle driver and the race way ................... 3 Needle swing (Parabola) ............................4 Needle down centering ............................5 Loop lift ..................................

  • Page 5: Removing Order Of Covers

    Removing order of covers • Remove accessory table (A). • Loosen and remove the screw then remove the face plate (B). • Loosen and remove the screws then remove the front cover (C). • Loosen and remove the screws lower the presser foot lifter, then remove the rear cover (D). - 1 -...

  • Page 6: Clearance Between The Needle And The Shuttle Hook Point (Shuttle Race Position)

    Clearance between the needle and the shuttle hook point (Shuttle race position) Standard • The shuttle race should be positioned correctly with respect to the turning direction of the shuttle race.. • Clearance between the needle and the shuttle hook point should be 0.02 to 0.1mm. Adjustment •...

  • Page 7: Clearance Between The Shuttle Driver And The Race Way

    Clearance between the shuttle driver and the race way Standard • The shuttle driver should rotate smoothly, no play should be felt in the race way. Adjustment 1. Loosen setscrews of the driver shaft gear 2. Adjust the clearance of the driver shaft 3.

  • Page 8: Needle Swing (Parabola)

    Needle swing (Parabola) Standard When the pattern selection dial is set at 4 (Zigzag), the needle swing should be 0.05 mm or less while the needle moves down from the needle plate to its lowest position. While the needle moves up from its lowest position to the needle plate, the needle swing should be 0.15 mm or less.

  • Page 9: Needle Down Centering

    Needle down centering Standard • When the pattern selection dial is set at 4 (Zigzag), the needle should move within a range of 5.0 to 5.4 mm across the needle plate. When the needle is lowered, it should not be too close to either the left or right edge of the needle plate hole.

  • Page 10: Loop Lift

    Loop lift Standard • When the pattern selection dial is set at 4 (Zigzag) and the needle is raised 1.7 to 2.1 mm from its lowest position on the left side, the shuttle hook point should align with the side of the needle. Adjustment 1.

  • Page 11: Height Of The Needle Bar

    Height of the needle bar Standard • When the pattern selection dial is set at 4 (Zigzag), and the needle is on the right side and contacts the shuttle hook, the clearance between the top of the needle eye and shuttle hook point should be within 0.8 and 1.2 mm.

  • Page 12: Tension Of The Timing Belt

    Tension of the timing belt Standard • The belt should slacken approx. 4 - 6mm under a 2N (200g) load. Adjustment 1. Loosen the setscrews on the motor holder 220/240V. 2. Loosen the nuts on the motor holder 120V. 3. Move the motor to make adjustment.

  • Page 13: Height Of The Feed Dogs

    Height of the feed dogs Standard • The feed dog teeth should be 0.9 - 1.1mm above the needle plate at the highest position. Adjustment 1. Loosen the setscrew on the vertical feed arm 2. Loosen the fixation screw of the eccentric nut 3.

  • Page 14: Height Of The Presser Bar

    Height of the presser bar Standard • The clearance between the presser foot and the needle plate should be between 6.0 and 6.5mm. Adjustment 1. Raise the presser foot. 2. Loosen the screw on the presser bar guide bracket. 3. Adjust the height of the presser bar. 4.

  • Page 15: Adjusting The Buttonhole's Left Backward Stitching And Right Forward Stitching

    Adjusting the buttonhole’s left backward stitching and right forward stitching Standard • When a buttonhole is sewn using the b d setting on the pattern selection dial, the left backward stitching and right forward stitching should appear identical. Adjustment 1. Set the buttonhole adjustment dial to 0°. 2.

  • Page 16: Adjusting The Buttonhole's Right Forward Stitching Width

    Adjusting the buttonhole’s right forward stitching width Standard • The width of the buttonhole’s right forward stitching should appear identical to that of the left backward stitching. (The difference should be less than 0.2 mm.) Adjustment 1. Install the darning plate onto the needle plate and lower the presser foot onto a piece of paper. 2.

  • Page 17: Upper Tension Control Dial

    Upper tension control dial Standard • A thread tension amount between 0.05 and 0.1N (5 and 10g) should be measured at dial position 0. Adjustment 1. Remove the tension dial sheet and the stopring 2. Remove the tension dial 3. Turn the adjusting nut left or right to make adjustment.

  • Page 18: Bobbin Winding

    Bobbin Winding Standard • The bobbin should wound evenly, up to 75 - 85% of the outer diameter of the bobbin. Adjustment 1. Loosen the set screw of the pretension slightly. 2. Shift the pretension up or down until even winding is achieved. 3.

  • Page 19: Adjustment Of Lower Thread Tension

    Adjustment of lower thread tension Standard Lower thread tension: 0.3 - 0.35N (30 - 35g) How to check the tension: Pull cotton thread #50 with tension gauge slowly. 1. Set cotton thread #50 in bobbin case and pull it with tension gauge. 2.
  • Page 20 HF885404-407 T1010134 Printed in Taiwan...
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This manual is also suitable for:

Ls-2220Ls-2720Ls-2125iLs-2820Ls-2125bLs-2920 ... Show all

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