Lervia KH 4001 Sewing Machine Manual

The Lervia KH 4001 is a versatile computerized sewing machine featuring 400 built-in stitches, automatic needle threader, LCD display, adjustable sewing speed, built-in needle plate, drop feed for free-motion sewing, automatic thread cutter, and multiple presser feet. Powered by 110-120V AC, 60Hz. Below are key sections for safety, features, setup, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: Computerized control panel, LCD display, automatic needle threader, built-in stitch patterns, drop-in bobbin system, adjustable presser foot pressure, free arm capability.

Installation & Setup

Unpack and inspect contents. Place on stable sewing table.

1. Remove packaging materials and protective covers
2. Attach power cord to machine and plug into AC outlet
3. Install foot controller in designated port
4. Set up thread stand and spool pins
5. Install needle following directional markings
6. Wind and insert bobbin into bobbin case

WARNING! Machine is electrical equipment; keep away from water and moisture. Ensure proper ventilation.

First-Time Operation

Power on machine; follow setup procedure.

1. Thread machine: Follow numbered threading path on machine
2. Use automatic needle threader for easy needle threading
3. Insert bobbin with thread running counterclockwise
4. Select basic straight stitch for initial testing
5. Adjust stitch length and width as needed
6. Test sew on scrap fabric to ensure proper operation

CAUTION! Always turn off power when changing needles or performing maintenance.

Specifications

• Stitch Capacity: 400 built-in stitches
• Stitch Types: Utility, decorative, quilting, heirloom, alphabets
• Max Sewing Speed: 850 stitches per minute
• Stitch Length: Adjustable 0-5mm
• Stitch Width: Adjustable 0-7mm
• Needle Positions: Multiple with needle up/down function
• Bobbin: Top loading, jam-proof
• Presser Feet: 8 included standard feet
• Power Source: 110-120V AC, 60Hz
• Machine Weight: 15.4 lbs (7 kg)

Controls and Settings

Access functions via LCD display and control buttons. Front Panel: Power switch, stitch selection dial, speed control slider, reverse stitch button.

Control Panel: Stitch selection buttons, length/width adjustment, mirror image, memory functions, automatic thread cutter, needle up/down.

Basic Settings: Stitch selection, length adjustment (0-5mm), width adjustment (0-7mm), tension control (0-9), speed control, presser foot pressure. Advanced: Memory functions for stitch combinations, mirror imaging, automatic reinforcement.

Stitch Selection

400 built-in stitches organized by category.

1. Utility Stitches: Straight, zigzag, stretch, overcast
2. Decorative Stitches: Scallops, waves, leaves, flowers
3. Quilting Stitches: Stippling, meandering, decorative quilting
4. Heirloom Stitches: Hemstitch, fagoting, smocking
5. Alphabets: 3 font styles, multiple sizes
6. Buttonholes: 10 automatic buttonhole styles

Tip: Use stitch chart reference guide for optimal stitch applications.

Basic Sewing Operations

Step-by-step sewing procedures.

1. Straight Stitching: Select stitch 01, adjust length 2.5mm
2. Zigzag Stitching: Select stitch 02, adjust width as needed
3. Buttonhole Making: Use automatic buttonhole function
4. Decorative Stitching: Select pattern, test on scrap fabric
5. Free-motion Sewing: Lower feed dogs, use darning foot
6. Quilting: Use walking foot for even fabric feeding
7. Blind Hem: Use blind hem foot and appropriate stitch
8. Zipper Installation: Use zipper foot for precise placement

WARNING! Keep fingers away from moving needle. Always use proper presser foot for each technique.

Maintenance & Cleaning

Regular maintenance ensures optimal performance.

1. Daily: Brush out lint from bobbin area and feed dogs
2. Weekly: Oil machine following lubrication points in manual
3. Monthly: Clean tension discs and thread path
4. As needed: Replace needle after 8-10 hours of sewing
5. Periodically: Check belt tension and motor brushes

CAUTION! Unplug machine before cleaning or maintenance. Use only recommended sewing machine oil.

Accessories

Included standard accessories.

Regulatory Information

UL Listed: Complies with UL 1278 standard for sewing machines. FCC Part 15: Class B digital device; complies with interference limits. Copyright © 2025 Lervia Sewing Machines; all rights reserved. For technical support, visit www.lerviasewing.com or contact 1-800-555-SEWING.

Troubleshooting

Reset: Turn machine off and on to reset computer functions.

Service: 1-800-555-SEWING; www.lerviasewing.com