The Bernina 600 series is a professional-grade sewing machine known for its precision engineering, durability, and advanced features. This repair manual covers disassembly, troubleshooting, maintenance procedures, and reassembly for models including 600, 630, 640, and 650. Below are comprehensive sections for technical specifications, common issues, repair procedures, and maintenance guidelines.
Key components: Heavy-duty motor, precision stitch mechanism, electronic controls, built-in LED lighting, automatic thread cutter, and multiple stitch patterns.
| Specification | Details |
|---|---|
| Motor Type | DC servo motor with electronic speed control |
| Stitch Length | 0-5mm adjustable |
| Stitch Width | 0-9mm adjustable |
| Stitch Patterns | Up to 200 built-in patterns |
| Maximum Speed | 1000 stitches per minute |
| Needle System | HAx1 SP standard |
| Bobbin Type | Class 15 transparent |
| Power Requirements | 110-120V AC, 60Hz |
| Weight | Approximately 25 lbs |
| Dimensions | 18" W x 8" H x 12" D |
Always disconnect power before performing any repairs or maintenance.
WARNING! Electrical shock hazard - always disconnect power. Moving parts can cause injury.
Essential tools for Bernina 600 series repairs:
CAUTION! Use proper tools to avoid stripping screws or damaging delicate components.
Access repair procedures via step-by-step instructions. Front Panel: Power switch, stitch selection, speed control.
Common Issues: Motor not running, uneven stitches, thread breaking, needle breaking, error codes displayed.
Mechanical: Check timing, hook alignment, feed dog movement. Electrical: Test motor, switches, circuit board. Software: Reset to factory settings, update firmware if available.
DC servo motor with electronic speed control and belt drive system.
Tip: Replace drive belt every 5 years or if cracked/stretched.
Precision timing between needle bar and hook assembly critical for proper stitching.
WARNING! Always use genuine Bernina replacement parts for critical components.
Electronic controls with circuit board, foot pedal speed control, and LED display.
Reverse disassembly process with careful attention to alignment and connections.
CAUTION! Test all functions before final assembly. Ensure no wires are pinched.
Regular maintenance prevents costly repairs and ensures optimal performance.
| Maintenance Task | Frequency | Procedure |
|---|---|---|
| Cleaning lint and dust | After each project | Use soft brush around bobbin area |
| Oil moving parts | Every 3 months | Use sewing machine oil only |
| Check motor brushes | Annually | Replace if less than 1/4" remaining |
| Inspect electrical cords | Every 6 months | Check for fraying or damage |
| Professional service | Every 2 years | Complete overhaul and timing check |
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Machine won't start | Power cord, foot pedal, motor | Check power outlet, test foot pedal switch, verify motor connection |
| Uneven stitches | Timing, tension, feed dogs | Check hook timing, adjust upper/lower tension, clean feed dogs |
| Thread breaking | Needle, tension, burrs | Replace needle, reduce tension, check for sharp edges |
| Needle breaking | Timing, bent needle, fabric | Check hook clearance, use straight needles, proper needle for fabric |
| Error codes displayed | Sensor, board, software | Consult error code chart, reset machine, check sensors |
Reset Procedure: Turn off machine, hold specific buttons while turning on (varies by model).
Technical Support: Contact authorized Bernina service center for complex repairs.