Brother 2125i Sewing Machine Manual

The Brother 2125i is a versatile electronic sewing machine designed for home use, featuring 25 built-in stitches, a one-step buttonhole, automatic needle threader, drop-in bobbin system, adjustable stitch length and width, free arm capability, and multiple presser feet. It operates on 120V AC and is suitable for a wide range of fabrics. Below are key sections for safety, features, setup, operation, maintenance, and troubleshooting.

1. Features at a Glance 2. Unpacking and Setup 3. First-Time Operation 4. Specifications 5. Controls and Functions 6. Stitch Selection and Settings 7. Threading and Bobbin Winding 8. Maintenance and Cleaning 9. Accessories Included 10. Safety Information 11. Troubleshooting

Features at a Glance

Key components: Electronic stitch selection panel, automatic needle threader, drop-in bobbin system, free arm, built-in LED light, and multiple presser feet.

FeatureDescription
Built-in Stitches25 stitches including utility, decorative, and stretch
One-Step ButtonholeAutomatically creates buttonholes of consistent size
Automatic Needle ThreaderEasily threads the needle with a lever
Drop-in BobbinTop-loading, clear-view bobbin system
Stitch Length/Width AdjustmentDial controls for customizing stitch size
Free ArmRemovable flatbed for sewing cuffs and sleeves
LED LightIlluminates the sewing area
Presser FeetIncludes zigzag, buttonhole, zipper, and blind hem feet
Reverse Stitch LeverReinforces seams at beginning and end
Power SwitchTurns machine on/off

Unpacking and Setup

Unpack and inspect all contents. Place on a stable, flat surface.

  1. Remove machine from box and all packaging materials.
  2. Attach the removable flatbed accessory to the free arm if not already installed.
  3. Connect the foot control pedal to the machine and plug the power cord into a 120V outlet.
  4. Install the needle and presser foot as described in the manual.

WARNING! Handle with care; the machine is heavy. Ensure the work area is clean and well-lit.

First-Time Operation

Power on the machine; familiarize yourself with basic functions.

  1. Thread the machine: Follow the numbered threading path on the machine.
  2. Wind the bobbin: Use the built-in bobbin winder.
  3. Select a stitch: Turn the stitch selection dial to choose a stitch.
  4. Test sew: Use scrap fabric to adjust tension and stitch settings.

CAUTION! Keep fingers away from the needle area during operation. Always turn off the machine when threading or changing accessories.

Specifications

Controls and Functions

Main controls located on the front and top of the machine.

Front Panel: Stitch selection dial, stitch length dial, stitch width dial, reverse stitch lever, power switch.

Top Features: Automatic needle threader lever, handwheel, bobbin winder, thread tension dial, presser foot lifter.

Basic Operations: Use the stitch selection dial to choose a stitch pattern. Adjust length and width as needed. Engage reverse stitching to lock seams. Raise and lower the presser foot using the lever.

Stitch Selection and Settings

The stitch selection dial includes symbols for each stitch type.

  1. Turn the dial to align the desired stitch symbol with the indicator.
  2. Adjust stitch length: Higher numbers give longer stitches.
  3. Adjust stitch width: For zigzag and decorative stitches.
  4. For buttonholes: Select the buttonhole symbol, place fabric under foot, and press foot pedal; machine will complete the buttonhole automatically.

Tip: Refer to the stitch chart on the machine or manual for recommended settings for different fabrics.

Threading and Bobbin Winding

Proper threading is essential for smooth operation.

  1. Raise the presser foot and needle to highest position.
  2. Place spool on holder and follow numbered threading path to needle.
  3. Use the automatic needle threader: Lower the lever and hook thread through needle eye.
  4. Wind bobbin: Place empty bobbin on winder, guide thread through bobbin winder tension, press foot pedal to wind.
  5. Insert bobbin: Drop bobbin into case with thread running counterclockwise; pull thread through slot.

WARNING! Always turn off power when threading. Ensure bobbin is correctly inserted to avoid thread jams.

Maintenance and Cleaning

Regular maintenance ensures optimal performance.

  1. Unplug the machine before cleaning.
  2. Remove the needle plate and bobbin case to clean lint and dust with a small brush.
  3. Oil the machine as per manual instructions using only sewing machine oil.
  4. Wipe exterior with a soft, dry cloth.

CAUTION! Do not use compressed air or liquid cleaners. Store in a dry place away from dust.

Accessories Included

Safety Information

Read all instructions before use. Keep away from children. Always unplug when not in use or during maintenance. Use correct needle and thread for fabric. Do not sew over pins. Avoid touching moving parts. Ensure adequate ventilation.

Electrical Safety: Use only 120V outlet. Do not use damaged cords. Do not operate with wet hands.

Troubleshooting

SymptomPossible CauseCorrective Action
Machine does not runPower cord not connectedCheck power switch, outlet, and cord connection.
Needle breaksIncorrect needle or bent needleReplace needle; ensure it is inserted fully and tightened.
Thread bunches underneathIncorrect bobbin threadingRe-thread bobbin ensuring correct direction and tension.
Skips stitchesWrong needle type or sizeUse correct needle for fabric (e.g., ballpoint for knits).
Uneven stitchesIncorrect thread tensionAdjust upper thread tension dial; re-thread top and bobbin.
Buttonhole not formingImproper foot attachmentUse buttonhole foot; ensure fabric is stabilized.

Reset: Turn machine off and on. Re-thread completely if issues persist.

Service: For professional repair, contact authorized Brother service center. Visit www.brother-usa.com or call 1-877-276-8437.

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